initial commit

crud/.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml

crud/.idea/compiler.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="crud" />
+      </profile>
+    </annotationProcessing>
+  </component>
+  <component name="JavacSettings">
+    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
+      <module name="crud" options="-parameters" />
+    </option>
+  </component>
+</project>
\ No newline at end of file

crud/.idea/encodings.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file

crud/.idea/jarRepositories.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.maven.apache.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file

crud/.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_18" default="true" project-jdk-name="openjdk-18" project-jdk-type="JavaSDK" />
+</project>
\ No newline at end of file

crud/HELP.md

+# Getting Started
+
+### Reference Documentation
+For further reference, please consider the following sections:
+
+* [Official Apache Maven documentation](https://maven.apache.org/guides/index.html)
+* [Spring Boot Maven Plugin Reference Guide](https://docs.spring.io/spring-boot/docs/2.7.0/maven-plugin/reference/html/)
+* [Create an OCI image](https://docs.spring.io/spring-boot/docs/2.7.0/maven-plugin/reference/html/#build-image)
+* [Spring Web](https://docs.spring.io/spring-boot/docs/2.7.0/reference/htmlsingle/#web)
+* [Spring Data JPA](https://docs.spring.io/spring-boot/docs/2.7.0/reference/htmlsingle/#data.sql.jpa-and-spring-data)
+
+### Guides
+The following guides illustrate how to use some features concretely:
+
+* [Building a RESTful Web Service](https://spring.io/guides/gs/rest-service/)
+* [Serving Web Content with Spring MVC](https://spring.io/guides/gs/serving-web-content/)
+* [Building REST services with Spring](https://spring.io/guides/tutorials/bookmarks/)
+* [Accessing data with MySQL](https://spring.io/guides/gs/accessing-data-mysql/)
+* [Accessing Data with JPA](https://spring.io/guides/gs/accessing-data-jpa/)
+

crud/mvnw

+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /usr/local/etc/mavenrc ] ; then
+    . /usr/local/etc/mavenrc
+  fi
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`\\unset -f command; \\command -v java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  $MAVEN_DEBUG_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" \
+  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

crud/mvnw.cmd

+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.1.0/maven-wrapper-3.1.0.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+  %JVM_CONFIG_MAVEN_PROPS% ^
+  %MAVEN_OPTS% ^
+  %MAVEN_DEBUG_OPTS% ^
+  -classpath %WRAPPER_JAR% ^
+  "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+  %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%

crud/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.7.0</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>com.arham</groupId>
+	<artifactId>crud</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>Spring Boot Crud</name>
+	<description>Spring Boot Crud example</description>
+	<properties>
+		<java.version>1.8</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>mysql</groupId>
+			<artifactId>mysql-connector-java</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.18.22</version>
+			<scope>provided</scope>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.mapstruct/mapstruct -->
+		<dependency>
+			<groupId>org.mapstruct</groupId>
+			<artifactId>mapstruct</artifactId>
+			<version>1.4.2.Final</version>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.mapstruct/mapstruct-processor -->
+		<dependency>
+			<groupId>org.mapstruct</groupId>
+			<artifactId>mapstruct-processor</artifactId>
+			<version>1.4.2.Final</version>
+		</dependency>
+		<dependency>
+			<groupId>org.jetbrains</groupId>
+			<artifactId>annotations</artifactId>
+			<version>RELEASE</version>
+			<scope>compile</scope>
+		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.11</version>
+			<scope>test</scope>
+		</dependency>
+
+		<!-- https://mvnrepository.com/artifact/io.rest-assured/rest-assured -->
+		<dependency>
+			<groupId>io.rest-assured</groupId>
+			<artifactId>rest-assured</artifactId>
+			<version>4.4.0</version>
+			<scope>test</scope>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/org.testng/testng -->
+		<dependency>
+			<groupId>org.testng</groupId>
+			<artifactId>testng</artifactId>
+			<version>7.1.0</version>
+			<scope>test</scope>
+		</dependency>
+		<!-- https://mvnrepository.com/artifact/com.googlecode.json-simple/json-simple -->
+		<dependency>
+			<groupId>com.googlecode.json-simple</groupId>
+			<artifactId>json-simple</artifactId>
+			<version>1.1.1</version>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-validation</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.hibernate.validator</groupId>
+			<artifactId>hibernate-validator</artifactId>
+			<version>6.0.16.Final</version>
+		</dependency>
+
+		<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter -->
+<!--		<dependency>-->
+<!--			<groupId>org.junit.jupiter</groupId>-->
+<!--			<artifactId>junit-jupiter</artifactId>-->
+<!--			<version>5.8.2</version>-->
+<!--			<scope>test</scope>-->
+<!--		</dependency>-->
+
+
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+
+<!--			<plugin>-->
+<!--				<groupId>org.apache.maven.plugins</groupId>-->
+<!--				<artifactId>maven-compiler-plugin</artifactId>-->
+<!--				<version>3.5.1</version>-->
+<!--				<configuration>-->
+<!--					<source>8</source> &lt;!&ndash; depending on your project. In this example, Java 8 is used &ndash;&gt;-->
+<!--					<target>8</target> &lt;!&ndash; depending on your project. In this example, Java 8 is used &ndash;&gt;-->
+<!--					<annotationProcessorPaths>-->
+<!--						<path>-->
+<!--							<groupId>org.mapstruct</groupId>-->
+<!--							<artifactId>mapstruct-processor</artifactId>-->
+<!--							<version>1.4.2.Final</version>-->
+<!--						</path>-->
+<!--					</annotationProcessorPaths>-->
+<!--				</configuration>-->
+<!--			</plugin>-->
+		</plugins>
+	</build>
+
+</project>

crud/src/main/java/com/arham/crud/SpringBootCrudApplication.java

+package com.arham.crud;
+
+import lombok.Builder;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootCrudApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringBootCrudApplication.class, args);
+	}
+
+}

crud/src/main/java/com/arham/crud/controller/StudentController.java

+package com.arham.crud.controller;
+
+import com.arham.crud.dto.StudentDTO;
+import com.arham.crud.model.Student;
+import com.arham.crud.service.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.*;
+
+import javax.validation.Valid;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.Pattern;
+import javax.validation.constraints.Positive;
+import java.net.URI;
+import java.util.List;
+
+@RestController
+@RequestMapping("/student")
+@Validated
+public class StudentController {
+    @Autowired
+    private StudentService service;
+
+    @GetMapping
+    public ResponseEntity<List<StudentDTO>> getAllStudents() {
+        List<StudentDTO> studentDTOList = service.getAllStudents();
+        ResponseEntity responseEntity;
+        if (studentDTOList.size() <= 0) {
+            responseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        else {
+            responseEntity = ResponseEntity.ok(studentDTOList);
+//            responseEntity = ResponseEntity.of(Optional.of(studentDTOList));
+        }
+        return responseEntity;
+    }
+
+    @GetMapping("/{id}")
+    public ResponseEntity<StudentDTO> getStudentById(@PathVariable @Positive long id) {
+        StudentDTO studentDTO = service.getStudentById(id);
+        ResponseEntity responseEntity;
+        if (studentDTO == null) {
+            responseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        else {
+            responseEntity = ResponseEntity.ok(studentDTO);
+        }
+        return responseEntity;
+    }
+
+    @GetMapping("/{id}/{name}")
+    public ResponseEntity<StudentDTO> getStudentByName(@PathVariable @NotEmpty @Pattern(regexp = "^[a-zA-Z ]*$") String name) {
+        StudentDTO studentDTO = service.getStudentByName(name);
+        ResponseEntity responseEntity;
+        if (studentDTO == null) {
+            responseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        else {
+            responseEntity = ResponseEntity.ok(studentDTO);
+        }
+        return responseEntity;
+    }
+
+    @PostMapping
+    public ResponseEntity<List<StudentDTO>> addStudentsList(@Valid @RequestBody List<StudentDTO> studentDTOList) {
+        List<StudentDTO> dtoList = service.saveStudentsList(studentDTOList);
+        ResponseEntity responseEntity;
+        if (dtoList.size() <= 0) {
+            responseEntity = ResponseEntity.status(HttpStatus.CONFLICT).build();
+        }
+        else {
+            responseEntity = ResponseEntity.created(URI.create("/student")).body(dtoList);
+        }
+        return responseEntity;
+    }
+
+    @PutMapping("/{id}")
+    public ResponseEntity<StudentDTO> updateStudent(@PathVariable @Positive long id, @Valid @RequestBody StudentDTO studentDTO) {
+        StudentDTO studDTO = service.updateStudent(id, studentDTO);
+        ResponseEntity responseEntity;
+        if (studDTO != null) {
+            responseEntity = ResponseEntity.ok(studDTO);
+        }
+        else {
+            responseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        return responseEntity;
+    }
+
+    @DeleteMapping("/{id}")
+    public ResponseEntity<StudentDTO> deleteStudent(@PathVariable @Positive long id) {
+        Boolean isDeleted = service.deleteStudent(id);
+        ResponseEntity responseEntity;
+        if (isDeleted) {
+            responseEntity = ResponseEntity.status(HttpStatus.NO_CONTENT).build();
+        }
+        else {
+            responseEntity = ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+        }
+        return responseEntity;
+    }
+}

crud/src/main/java/com/arham/crud/dto/StudentDTO.java

+package com.arham.crud.dto;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import org.springframework.format.annotation.NumberFormat;
+
+import javax.validation.constraints.*;
+
+@Getter
+@Setter
+@NoArgsConstructor
+@AllArgsConstructor
+public class StudentDTO {
+
+//    @Positive
+    private long id;
+
+    @NotEmpty(message = "name can not be empty")
+    @Size(min = 3, max = 25, message = "name should contain at least 3 characters and at most 25")
+    @Pattern(regexp = "^[a-zA-Z ]*$", message = "Please enter a valid name")
+    //    @Pattern(regexp = "^[A-Za-z]*$", message = "Please enter a valid name")
+    private String name;
+
+    @NotEmpty(message = "Class Name can not be empty")
+    private String className;
+}

crud/src/main/java/com/arham/crud/mapper/StudentMapper.java

+package com.arham.crud.mapper;
+
+import com.arham.crud.dto.StudentDTO;
+import com.arham.crud.model.Student;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.Mappings;
+
+import java.util.List;
+
+@Mapper(componentModel = "spring")
+public interface StudentMapper {
+
+//    @Mappings({ @Mapping(target = "id", source = "student.id"), @Mapping(target = "studentName", source = "student.name"), @Mapping(target = "studentClassName", source = "student.className") })
+    StudentDTO toStudentDTO(Student student);
+
+    List<StudentDTO> toStudentDTO(List<Student> studentList);
+
+    //    @Mappings({ @Mapping(target = "id", source = "studentDTO.studentId"), @Mapping(target = "name", source = "studentDTO.studentName"), @Mapping(target = "className", source = "studentDTO.studentClassName") })
+    Student toStudent(StudentDTO studentDTO);
+
+    List<Student> toStudent(List<StudentDTO> studentDTOList);
+}

crud/src/main/java/com/arham/crud/model/Student.java

+package com.arham.crud.model;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.validation.constraints.NotEmpty;
+import javax.validation.constraints.Pattern;
+import javax.validation.constraints.Positive;
+import javax.validation.constraints.Size;
+
+@AllArgsConstructor
+@NoArgsConstructor
+@Getter
+@Setter
+@Entity
+public class Student {
+    @Id
+    @GeneratedValue(strategy = GenerationType.AUTO)
+    private long id;
+
+    private String name;
+
+    private String className;
+}

crud/src/main/java/com/arham/crud/repository/StudentRepo.java

+package com.arham.crud.repository;
+
+import com.arham.crud.model.Student;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface StudentRepo extends JpaRepository<Student, Long> {
+    Student findByName(String name);
+}

crud/src/main/java/com/arham/crud/service/IStudentService.java

+package com.arham.crud.service;
+import com.arham.crud.dto.StudentDTO;
+
+import java.util.List;
+
+public interface IStudentService {
+    List<StudentDTO> saveStudentsList(List<StudentDTO> studentDTOList);
+    List<StudentDTO> getAllStudents();
+    StudentDTO getStudentById(long id);
+    StudentDTO getStudentByName(String name);
+    boolean deleteStudent(long id);
+    StudentDTO updateStudent(long id, StudentDTO studentDTO);
+}

crud/src/main/java/com/arham/crud/service/StudentService.java

+package com.arham.crud.service;
+
+import com.arham.crud.dto.StudentDTO;
+import com.arham.crud.mapper.StudentMapper;
+import com.arham.crud.model.Student;
+import com.arham.crud.repository.StudentRepo;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class StudentService implements IStudentService {
+    @Autowired
+    private StudentRepo studentRepo;
+    @Autowired
+    private StudentMapper mapper;
+
+    @Override
+    public List<StudentDTO> saveStudentsList(List<StudentDTO> studentDTOList) {
+        List<StudentDTO> newStudentList = new ArrayList<>();
+        List<StudentDTO> dtoList = new ArrayList<>();
+        for (StudentDTO studentDTO : studentDTOList) {
+            if (studentRepo.findByName(studentDTO.getName()) == null) {
+                newStudentList.add(studentDTO);
+            }
+        }
+        if (newStudentList.size() > 0) {
+            List<Student> studentList = mapper.toStudent(newStudentList);
+            dtoList = mapper.toStudentDTO(studentRepo.saveAll(studentList));
+        }
+        return dtoList;
+
+        /*
+        try{
+            List<StudentDTO> newStudentList = new ArrayList<>();
+            int count = 0;
+            for (StudentDTO studentDTO : studentDTOList) {
+                // in if statement, we should check unique id such as email
+                if (studentRepo.findByName(studentDTO.getName()) == null) {
+                    newStudentList.add(studentDTO);
+                }
+                else {
+                    count++;
+                }
+            }
+            if (newStudentList.size() <= 0) {
+                return new ResponseEntity<>(newStudentList, HttpStatus.BAD_REQUEST);
+//                return ResponseEntity.status(HttpStatus.BAD_REQUEST).build();
+//                return ResponseEntity.status(HttpStatus.CONFLICT).build();
+            }
+            List<Student> studentList = mapper.toStudent(newStudentList);
+            List<StudentDTO> dtoList = mapper.toStudentDTO(studentRepo.saveAll(studentList));
+//            return ResponseEntity.status(HttpStatus.CREATED).build(); // returns status only
+            return ResponseEntity.created(URI.create("/student"))
+                    .header("Students already present", ""+count).body(dtoList);
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).build();
+        }
+     */
+    }
+
+    @Override
+    public List<StudentDTO> getAllStudents() {
+
+        List<Student> studentList = studentRepo.findAll();
+        List<StudentDTO> studentDTOList = mapper.toStudentDTO(studentList);
+        return studentDTOList;
+
+//        List<Student> studentList = null;
+//        try {
+//            studentList = studentRepo.findAll();
+//            List<StudentDTO> studentDTOList = mapper.toStudentDTO(studentList);
+//            return studentDTOList;
+//        } catch (Exception e) {
+//            e.printStackTrace();
+//            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+//        }
+
+    }
+
+    @Override
+    public StudentDTO getStudentById(long id) {
+
+        Optional<Student> student = studentRepo.findById(id);
+        StudentDTO studentDTO = mapper.toStudentDTO(student.orElse(null));
+        return studentDTO;
+
+//       Optional<Student> student;
+//        try {
+//            student = studentRepo.findById(id);
+//            StudentDTO studentDTO = mapper.toStudentDTO(student.get()); // .get() will convert optional to object
+//            return ResponseEntity.of(Optional.of(studentDTO));
+//        } catch (Exception e) {
+//            e.printStackTrace();
+//            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+//        }
+    }
+
+    @Override
+    public StudentDTO getStudentByName(String name) {
+        Student student = studentRepo.findByName(name);
+        StudentDTO studentDTO = mapper.toStudentDTO(student);
+        return studentDTO;
+
+//        Student student = null;
+//        try{
+//            student = studentRepo.findByName(name);
+//            StudentDTO studentDTO = mapper.toStudentDTO(student);
+//            return ResponseEntity.of(Optional.of(studentDTO));
+//        } catch (Exception e) {
+//            e.printStackTrace();
+//            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+//        }
+
+//        return mapper.toStudentDTO(studentRepo.findByName(name));
+    }
+
+    @Override
+    public boolean deleteStudent(long id) {
+        Boolean isDeleted = false;
+        if (studentRepo.findById(id).isPresent()) {
+            studentRepo.deleteById(id);
+            isDeleted = true;
+        }
+        return isDeleted;
+
+//        try{
+//            studentRepo.findById(id);
+//            studentRepo.deleteById(id);
+//            return ResponseEntity.status(HttpStatus.NO_CONTENT).build();
+//        } catch (Exception e) {
+//            e.printStackTrace();
+//            return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+//        }
+
+//        if (studentRepo.findById(id).isPresent())
+//            studentRepo.deleteById(id);
+//        else
+//            return "Student with id = " + id + " is not present!";
+//        return "Student with id = " + id + " is successfully deleted!";
+    }
+
+    @Override
+    public StudentDTO updateStudent(long id, StudentDTO studentDTO) {
+        Student student = studentRepo.findById(id).orElse(null);
+        StudentDTO updateStudentDTO = mapper.toStudentDTO(student);
+        if (student != null) {
+            updateStudentDTO.setName(studentDTO.getName());
+            updateStudentDTO.setClassName(studentDTO.getClassName());
+            studentRepo.save(mapper.toStudent(updateStudentDTO));
+        }
+        // this else is to save a new student if it was not present
+//        else {
+//            updateStudentDTO = mapper.toStudentDTO(studentRepo.save(student));
+//        }
+        return updateStudentDTO;
+
+/*
+        StudentDTO updateStudentDTO = mapper.toStudentDTO(studentRepo.findById(id).orElse(null));
+        //instead of using try/catch, we've used if statement
+        if (updateStudentDTO != null) {
+            updateStudentDTO.setName(studentDTO.getName());
+            updateStudentDTO.setClassName(studentDTO.getClassName());
+            studentRepo.save(mapper.toStudent(updateStudentDTO));
+
+            // returns the updated student and status OK
+            return ResponseEntity.ok().body(updateStudentDTO);
+
+            // returns the updatedStudent as well as default success status 200 (OK)
+//            return ResponseEntity.of(Optional.of(updateStudentDTO));
+
+            // just returns the status 200 (OK)
+//            return ResponseEntity.status(HttpStatus.OK).build();
+        }
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).build();
+
+ */
+    }
+
+}

crud/src/main/resources/application.properties

+spring.datasource.driver-classname=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://localhost:3306/StudentCrud
+spring.datasource.username=root
+spring.datasource.password=arham@123
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
\ No newline at end of file

crud/src/test/java/com/arham/crud/SpringBootCrudApplicationTests.java

+package com.arham.crud;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SpringBootCrudApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

crud/src/test/java/com/arham/crud/controller/RestAssuredApi.java

+package com.arham.crud.controller;
+
+import io.restassured.RestAssured;
+import io.restassured.http.ContentType;
+import org.json.simple.JSONObject;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.testng.annotations.Ignore;
+import org.testng.annotations.Test;
+
+import java.io.File;
+//@RunWith(SpringRunner.class)
+//@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+//@Ignore
+public class RestAssuredApi {
+
+//    @BeforeAll
+//    public static void setup(){
+//        RestAssured.baseURI = "http://localhost:8080/student";
+//    }
+
+    private static final String STUDENT_BASE_URI = "http://localhost:8080/student";
+
+    @Test
+    public void getAllStudents() {
+//        RestAssured.baseURI = "http://localhost:8080/student";
+        RestAssured.given().get(STUDENT_BASE_URI).then().statusCode(200).log().all();
+    }
+
+    @Test
+    public void getStudentById() {
+//        RestAssured.baseURI = "http://localhost:8080/student";
+        RestAssured.given().get(STUDENT_BASE_URI + "/1").then().statusCode(200).log().all();
+    }
+
+    @Test
+    public void getStudentByName() {
+//        RestAssured.baseURI = "http://localhost:8080/student";
+        RestAssured.given()
+                .get(STUDENT_BASE_URI + "/4/Murtaza")
+                .then()
+                .statusCode(200)
+                .log()
+                .all();
+    }
+
+    @Test
+    public void saveStudent() {
+
+        // Correct method
+//        RestAssured.baseURI = "http://localhost:8080/student";
+        File file = new File("/Users/ashafiq/Documents/postFile.json");
+        RestAssured.given()
+                .contentType(ContentType.JSON)
+                .accept(ContentType.JSON)
+                .log()
+                .all()
+                .body(file)
+                .post(STUDENT_BASE_URI)
+                .then()
+                .assertThat()
+                .statusCode(201);
+
+        // Method 2
+//        StudentDTO studentDTO = RestAssured.get().as(StudentDTO.class);
+
+//        StudentDTO studentDTO = new StudentDTO();
+//        studentDTO.setId(22);
+//        studentDTO.setName("Moses");
+//        studentDTO.setClassName("MS");
+//        RestAssured.given().body(studentDTO)
+//                .when().post()
+//                .then().statusCode(200);
+
+        //Method 3
+//        RestAssured.baseURI = "http://localhost:8080/student";
+//        JSONObject request = new JSONObject();
+//        request.put("name", "Test3"); // we may also use hash map here for (key, value) pair
+//        request.put("className", "MS");
+////        request.put("id", "22");
+////        request.put("name", "Test 2");
+////        request.put("className", "MS");
+//
+//        RestAssured.given().
+//                contentType(ContentType.JSON).
+//                body(request.toJSONString()).
+////                accept(ContentType.JSON).
+////                body(request.toJSONString()).
+//                when().post().
+//                then().assertThat().statusCode(200);
+    }
+
+    @Test
+    public void updateStudent() {
+//        RestAssured.baseURI = "http://localhost:8080/student";
+        JSONObject request = new JSONObject();
+        request.put("name", "Testing Name"); // we may also use hash map here for (key, value) pair
+        request.put("className", "BS");
+
+        RestAssured.given().
+                contentType(ContentType.JSON).
+                accept(ContentType.JSON).
+                body(request.toJSONString()).
+                when().put(STUDENT_BASE_URI + "/21").
+                then().statusCode(200);
+    }
+
+    @Test
+    public void deleteStudentById() {
+//        RestAssured.baseURI = "http://localhost:8080/student";
+        RestAssured.given().delete(STUDENT_BASE_URI + "/58").
+                then().statusCode(204).
+                log().all();
+    }
+}

crud/src/test/java/com/arham/crud/service/StudentServiceUnitTest.java

+package com.arham.crud.service;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyList;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.arham.crud.dto.StudentDTO;
+import com.arham.crud.mapper.StudentMapper;
+import com.arham.crud.model.Student;
+import com.arham.crud.repository.StudentRepo;
+
+import com.arham.crud.utils.MockStudent;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import java.util.List;
+import java.util.Optional;
+
+@Ignore
+@RunWith(MockitoJUnitRunner.Silent.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)
+public class StudentServiceUnitTest {
+    @Mock
+    private StudentRepo studentRepo;
+    @Mock
+    private StudentMapper mapper;
+    @InjectMocks
+    private StudentService studentService;
+
+    @Before
+    public void setup(){
+        MockitoAnnotations.openMocks(this);
+    }
+
+    @Test
+    public void testAddStudent() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        when(studentRepo.saveAll(anyList())).thenReturn(aMockStudentEntityList);
+        when(mapper.toStudentDTO(anyList())).thenReturn(aMockStudentDTOList);
+        when(mapper.toStudent(anyList())).thenReturn(aMockStudentEntityList);
+
+        List<StudentDTO> newStudentList = studentService.saveStudentsList(aMockStudentDTOList);
+
+//        Assert.assertEquals(201, statusCode.getStatusCodeValue());
+//        Assert.assertEquals(ResponseEntity.status(HttpStatus.CREATED.value()), newStudentList.getStatusCode().value());
+        Assert.assertEquals(aMockStudentDTOList.get(0).getName(), newStudentList.get(0).getName());
+        Assert.assertEquals(aMockStudentDTOList.get(1).getClassName(), newStudentList.get(1).getClassName());
+        Assert.assertNotEquals("murtaza", newStudentList.get(1).getName());
+    }
+
+    @Test
+    public void testGetAllStudents() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        when(studentRepo.findAll()).thenReturn(aMockStudentEntityList);
+        when(mapper.toStudentDTO(anyList())).thenReturn(aMockStudentDTOList);
+        when(mapper.toStudent(anyList())).thenReturn(aMockStudentEntityList);
+
+        List<StudentDTO> newStudentList = studentService.getAllStudents();
+
+        Assert.assertEquals(aMockStudentDTOList.get(0).getName(), newStudentList.get(0).getName());
+        Assert.assertEquals(aMockStudentDTOList.get(1).getClassName(), newStudentList.get(1).getClassName());
+
+        Assert.assertNotEquals("Masters", newStudentList.get(0).getClassName());
+    }
+
+    @Test
+    public void testGetStudentByIdIfFound() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        long testId = aMockStudentEntity.getId();
+
+        when(studentRepo.findById(testId)).thenReturn(Optional.of(aMockStudentEntity)); // for checking the value
+        when(mapper.toStudentDTO(any(Student.class))).thenReturn(aMockStudentDTO);
+
+        StudentDTO newStudent = studentService.getStudentById(testId);
+        Assert.assertEquals(aMockStudentDTO.getName(), newStudent.getName()); // for asserting the actual value
+    }
+
+    @Test
+    public void testGetStudentByIdIfNotFound() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        long testId = aMockStudentEntity.getId();
+
+        when(studentRepo.findById(testId)).thenReturn(Optional.empty()); // this is for Optional.orElse(null)
+        when(mapper.toStudentDTO(any(Student.class))).thenReturn(aMockStudentDTO);
+
+        StudentDTO newStudent = studentService.getStudentById(testId);
+//        Assert.assertEquals(404, newStudent.getStatusCodeValue());
+        Assert.assertNull(newStudent); // part of Optional.orElse(null)
+    }
+
+    @Test
+    public void testGetStudentByName() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        String testName = aMockStudentEntity.getName();
+
+        when(studentRepo.findByName(testName)).thenReturn(aMockStudentEntity);
+        when(mapper.toStudentDTO(any(Student.class))).thenReturn(aMockStudentDTO);
+
+        StudentDTO newStudent = studentService.getStudentByName(testName);
+        Assert.assertEquals(aMockStudentDTO.getClassName(), newStudent.getClassName());
+    }
+
+    @Test
+    public void testDeleteStudentIfIdFound() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        long testId = aMockStudentEntity.getId();
+
+        when(studentRepo.findById(testId)).thenReturn(Optional.of(aMockStudentEntity));
+//        when(mapper.toStudentDTO(any(Student.class))).thenReturn(aMockStudentDTO); // mapper was not used in delete
+
+        Boolean isDeleted = studentService.deleteStudent(testId);
+//        ResponseEntity<StudentDTO> statusCode = studentService.deleteStudent(testId);
+
+        // verify is used to check if the method was invoked or not, we use verify when there is no return type
+        verify(studentRepo).deleteById(aMockStudentEntity.getId()); // for repo, we use entity, not DTO
+        Assert.assertTrue(isDeleted);
+
+//        Assert.assertEquals(ResponseEntity.status(HttpStatus.NO_CONTENT), statusCode.getStatusCode());
+
+//        Assert.assertTrue(message.contains(testId + " is successfully deleted!"));
+//        Assert.assertFalse(message.contains(testId + " is not successfully deleted!"));
+    }
+
+    @Test
+    public void testDeleteStudentIfIdNotFound() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        long testId = 3L;
+
+        when(studentRepo.findById(testId)).thenReturn(Optional.ofNullable(null));
+
+        Boolean isDeleted = studentService.deleteStudent(testId);
+        Assert.assertFalse(isDeleted);
+
+//        ResponseEntity<StudentDTO> statusCode = studentService.deleteStudent(testId);
+//        Assert.assertEquals(ResponseEntity.status(HttpStatus.NOT_FOUND), statusCode.getStatusCode());
+//        Assert.assertTrue(message.contains(testId + " is not present"));
+//        Assert.assertFalse(message.contains(testId + "is present"));
+    }
+
+    @Test
+    public void testUpdateStudentIfIdFound() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        long testId = aMockStudentEntity.getId();
+
+        when(studentRepo.findById(testId)).thenReturn(Optional.of(aMockStudentEntity));
+        when(mapper.toStudentDTO(any(Student.class))).thenReturn(aMockStudentDTO);
+        when(mapper.toStudent(any(StudentDTO.class))).thenReturn(aMockStudentEntity);
+
+        StudentDTO newStudent = studentService.updateStudent(testId, aMockStudentDTO);
+        // verify is used to check if the method was invoked or not, we use verify when there is no return type
+        verify(studentRepo).save(aMockStudentEntity);
+        Assert.assertEquals(newStudent.getName(), aMockStudentDTO.getName());
+
+//        Assert.assertEquals(ResponseEntity.status(HttpStatus.OK), statusCode.getStatusCode());
+//        Assert.assertTrue(message.contains(testId + " has been updated successfully!"));
+//        Assert.assertFalse(message.contains(testId + " has not been updated successfully!"));
+    }
+
+    @Test
+    public void testUpdateStudentIfIdNotFound() {
+        List<Student> aMockStudentEntityList = MockStudent.createStudentEntityList();
+        List<StudentDTO> aMockStudentDTOList = MockStudent.createStudentDTOList();
+
+        Student aMockStudentEntity = aMockStudentEntityList.get(0);
+        StudentDTO aMockStudentDTO = aMockStudentDTOList.get(0);
+
+        long testId = 4L;
+
+        when(studentRepo.findById(testId)).thenReturn(Optional.ofNullable(null));
+        Mockito.doReturn(aMockStudentDTO).when(mapper).toStudentDTO(any(Student.class));
+
+   // when(mapper.toStudentDTO(any(Student.class))).thenReturn(aMockStudentDTO);
+
+        when(mapper.toStudent(any(StudentDTO.class))).thenReturn(aMockStudentEntity);
+
+        StudentDTO newStudent = studentService.updateStudent(testId, aMockStudentDTO);
+        Assert.assertNull(newStudent);
+
+//        Assert.assertEquals(ResponseEntity.status(HttpStatus.NOT_FOUND), statusCode.getStatusCode());
+//        Assert.assertTrue(message.contains(testId + " is not present."));
+//        Assert.assertFalse(message.contains(testId + " is present."));
+    }
+}

crud/src/test/java/com/arham/crud/utils/MockStudent.java

+package com.arham.crud.utils;
+
+import com.arham.crud.dto.StudentDTO;
+import com.arham.crud.model.Student;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MockStudent {
+
+    public static Student createMockStudentEntity (long id, String name, String className) {
+        Student student = new Student(id, name, className);
+        return student;
+    }
+
+    public static List<Student> createStudentEntityList() {
+        List<Student> studentList = new ArrayList<>();
+        studentList.add(createMockStudentEntity(1, "Arham", "BE"));
+        studentList.add(createMockStudentEntity(2, "Murtaza", "BS"));
+        return studentList;
+    }
+
+    public static StudentDTO createMockStudentDTO (long id, String name, String className) {
+        StudentDTO studentDTO = new StudentDTO(id, name, className);
+        return studentDTO;
+    }
+
+    public static List<StudentDTO> createStudentDTOList() {
+        List<StudentDTO> studentList = new ArrayList<>();
+        studentList.add(createMockStudentDTO(1, "Arham", "BE"));
+        studentList.add(createMockStudentDTO(2, "Murtaza", "BS"));
+        return studentList;
+    }
+
+}

crud/target/classes/application.properties

+spring.datasource.driver-classname=com.mysql.cj.jdbc.Driver
+spring.datasource.url=jdbc:mysql://localhost:3306/StudentCrud
+spring.datasource.username=root
+spring.datasource.password=arham@123
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
\ No newline at end of file

crud/target/generated-sources/annotations/com/arham/crud/mapper/StudentMapperImpl.java

+package com.arham.crud.mapper;
+
+import com.arham.crud.dto.StudentDTO;
+import com.arham.crud.model.Student;
+import java.util.ArrayList;
+import java.util.List;
+import javax.annotation.Generated;
+import org.springframework.stereotype.Component;
+
+@Generated(
+    value = "org.mapstruct.ap.MappingProcessor",
+    date = "2022-06-23T22:27:27+0500",
+    comments = "version: 1.4.2.Final, compiler: javac, environment: Java 1.8.0_333 (Oracle Corporation)"
+)
+@Component
+public class StudentMapperImpl implements StudentMapper {
+
+    @Override
+    public StudentDTO toStudentDTO(Student student) {
+        if ( student == null ) {
+            return null;
+        }
+
+        StudentDTO studentDTO = new StudentDTO();
+
+        studentDTO.setId( student.getId() );
+        studentDTO.setName( student.getName() );
+        studentDTO.setClassName( student.getClassName() );
+
+        return studentDTO;
+    }
+
+    @Override
+    public List<StudentDTO> toStudentDTO(List<Student> studentList) {
+        if ( studentList == null ) {
+            return null;
+        }
+
+        List<StudentDTO> list = new ArrayList<StudentDTO>( studentList.size() );
+        for ( Student student : studentList ) {
+            list.add( toStudentDTO( student ) );
+        }
+
+        return list;
+    }
+
+    @Override
+    public Student toStudent(StudentDTO studentDTO) {
+        if ( studentDTO == null ) {
+            return null;
+        }
+
+        Student student = new Student();
+
+        student.setId( studentDTO.getId() );
+        student.setName( studentDTO.getName() );
+        student.setClassName( studentDTO.getClassName() );
+
+        return student;
+    }
+
+    @Override
+    public List<Student> toStudent(List<StudentDTO> studentDTOList) {
+        if ( studentDTOList == null ) {
+            return null;
+        }
+
+        List<Student> list = new ArrayList<Student>( studentDTOList.size() );
+        for ( StudentDTO studentDTO : studentDTOList ) {
+            list.add( toStudent( studentDTO ) );
+        }
+
+        return list;
+    }
+}