Adding customer crud app

.gitignore

+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file

.idea/.gitignore

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

.idea/checkstyle-idea.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CheckStyle-IDEA" serialisationVersion="2">
+    <checkstyleVersion>10.12.5</checkstyleVersion>
+    <scanScope>JavaOnly</scanScope>
+    <copyLibs>true</copyLibs>
+    <option name="thirdPartyClasspath" />
+    <option name="activeLocationIds" />
+    <option name="locations">
+      <list>
+        <ConfigurationLocation id="bundled-sun-checks" type="BUNDLED" scope="All" description="Sun Checks">(bundled)</ConfigurationLocation>
+        <ConfigurationLocation id="bundled-google-checks" type="BUNDLED" scope="All" description="Google Checks">(bundled)</ConfigurationLocation>
+      </list>
+    </option>
+  </component>
+</project>
\ No newline at end of file

.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" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file

.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>
+    <option name="workspaceImportForciblyTurnedOn" value="true" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+    <mapping directory="$PROJECT_DIR$/spring-mvc" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.example</groupId>
+    <artifactId>customer-app</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>war</packaging>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-webmvc</artifactId>
+      <version>5.2.7.RELEASE</version>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-orm</artifactId>
+      <version>5.2.7.RELEASE</version>
+    </dependency>
+    <dependency>
+      <groupId>jstl</groupId>
+      <artifactId>jstl</artifactId>
+      <version>1.2</version>
+    </dependency>
+    <dependency>
+      <groupId>mysql</groupId>
+      <artifactId>mysql-connector-java</artifactId>
+      <version>8.0.20</version>
+    </dependency>
+    <dependency>
+      <groupId>org.hibernate</groupId>
+      <artifactId>hibernate-core</artifactId>
+      <version>5.4.24.Final</version>
+    </dependency>
+    <dependency>
+      <groupId>org.hibernate.validator</groupId>
+      <artifactId>hibernate-validator</artifactId>
+      <version>6.1.5.Final</version>
+    </dependency>
+    <dependency>
+      <groupId>javax.validation</groupId>
+      <artifactId>validation-api</artifactId>
+      <version>1.0.0.GA</version>
+    </dependency>
+    <dependency>
+      <groupId>com.mchange</groupId>
+      <artifactId>c3p0</artifactId>
+      <version>0.9.5.5</version>
+    </dependency>
+    <dependency>
+      <groupId>jakarta.persistence</groupId>
+      <artifactId>jakarta.persistence-api</artifactId>
+      <version>3.0.0</version> <!-- Choose the appropriate version -->
+    </dependency>
+    <dependency>
+      <groupId>jakarta.transaction</groupId>
+      <artifactId>jakarta.transaction-api</artifactId>
+      <version>2.0.0</version> <!-- Choose the appropriate version -->
+    </dependency>
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.13.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+  <build>
+    <finalName>customer-app</finalName>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+      <plugins>
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.1.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.8.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>2.22.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-war-plugin</artifactId>
+          <version>3.2.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>2.5.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>2.8.2</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>
\ No newline at end of file

src/main/java/com/customerdemo/controller/CustomerController.java

+package com.customerdemo.controller;
+
+import com.customerdemo.entity.Customer;
+import com.customerdemo.service.CustomerService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@Controller
+@RequestMapping("/customer")
+public class CustomerController {
+    private final CustomerService customerService;
+
+    @Autowired
+    public CustomerController(CustomerService customerService) {
+        this.customerService = customerService;
+    }
+
+    @GetMapping("/list")
+    public String listCustomer(Model model){
+        // if record not available in database then getCustomers() given an error
+        try{
+            List<Customer> customers = customerService.getCustomers();
+            model.addAttribute("customers", customers);
+        }catch (Exception e){
+            model.addAttribute("customers", null);
+        }
+        return "customers-list";
+    }
+
+    @GetMapping("/show-customer-form")
+    public String showCustomerForm(Model model){
+        model.addAttribute("customer", new Customer());
+        return "customer-form";
+    }
+
+    @GetMapping("/update-form")
+    public String updateCustomerForm(@RequestParam("id")int id, Model model){
+        model.addAttribute("customer", customerService.getCustomer(id));
+        return "customer-form";
+    }
+
+    @PostMapping("/save")
+    public String saveCustomer(@ModelAttribute("customer") Customer customer){
+        customerService.saveOrUpdate(customer);
+        return "redirect:/customer/list";
+    }
+
+    @GetMapping("/delete")
+    public String deleteCustomer(@RequestParam("id") int id){
+        customerService.delete(id);
+        return "redirect:/customer/list";
+    }
+}

src/main/java/com/customerdemo/dao/CustomerDAO.java

+package com.customerdemo.dao;
+
+import com.customerdemo.entity.Customer;
+
+import java.util.List;
+
+public interface CustomerDAO {
+    List<Customer> getCustomers();
+    void saveOrUpdate(Customer customer);
+    Customer getCustomer(int id);
+    void delete(int id);
+}
+

src/main/java/com/customerdemo/dao/CustomerDAOImpl.java

+package com.customerdemo.dao;
+
+import com.customerdemo.entity.Customer;
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.query.Query;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@Repository
+class CustomerDAOImpl  implements  CustomerDAO{
+
+    private final SessionFactory sessionFactory;
+
+    @Autowired
+    public CustomerDAOImpl(SessionFactory sessionFactory) {
+        this.sessionFactory = sessionFactory;
+    }
+
+    @Override
+    public List<Customer> getCustomers() {
+        Session session = sessionFactory.getCurrentSession();
+        Query<Customer> query;
+        query = session.createQuery("from Customer", Customer.class);
+        return query.getResultList();
+    }
+
+    @Override
+    public void saveOrUpdate(Customer customer) {
+        Session session = sessionFactory.getCurrentSession();
+        session.saveOrUpdate(customer);
+    }
+
+    @Override
+    public Customer getCustomer(int id) {
+        Session session = sessionFactory.getCurrentSession();
+        return session.get(Customer.class,id);
+    }
+
+    @Override
+    public void delete(int id) {
+        Session session = sessionFactory.getCurrentSession();
+        Query query = session.createQuery("delete from Customer c where c.Id =:id");
+        query.setParameter("id",id);
+        query.executeUpdate();
+    }
+}

src/main/java/com/customerdemo/entity/Customer.java

+package com.customerdemo.entity;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
+public class Customer {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private int id;
+    private String name;
+    private String email;
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+}
+

src/main/java/com/customerdemo/service/CustomerService.java

+package com.customerdemo.service;
+
+import com.customerdemo.entity.Customer;
+
+import java.util.List;
+
+public interface CustomerService {
+    List<Customer> getCustomers();
+    void saveOrUpdate(Customer customer);
+    Customer getCustomer(int id);
+    void delete(int id);
+}
+

src/main/java/com/customerdemo/service/impl/CustomerServiceImpl.java

+package com.customerdemo.service.impl;
+
+import com.customerdemo.dao.CustomerDAO;
+import com.customerdemo.entity.Customer;
+import com.customerdemo.service.CustomerService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+
+@Service
+public class CustomerServiceImpl implements CustomerService {
+    private final CustomerDAO customerDAO;
+
+    @Autowired
+    public CustomerServiceImpl(CustomerDAO customerDAO) {
+        this.customerDAO = customerDAO;
+    }
+
+    @Override
+    @Transactional
+    public List<Customer> getCustomers() {
+        return customerDAO.getCustomers();
+    }
+
+    @Override
+    @Transactional
+    public void saveOrUpdate(Customer customer) {
+        customerDAO.saveOrUpdate(customer);
+    }
+
+    @Override
+    @Transactional
+    public Customer getCustomer(int id) {
+        return customerDAO.getCustomer(id);
+    }
+
+    @Override
+    @Transactional
+    public void delete(int id) {
+        customerDAO.delete(id);
+    }
+}

src/main/webapp/WEB-INF/spring-mvc-crud-demo-servlet.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
+	xmlns:context="http://www.springframework.org/schema/context"
+    xmlns:tx="http://www.springframework.org/schema/tx"
+	xmlns:mvc="http://www.springframework.org/schema/mvc"
+	xsi:schemaLocation="
+		http://www.springframework.org/schema/beans
+		http://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context
+		http://www.springframework.org/schema/context/spring-context.xsd
+		http://www.springframework.org/schema/mvc
+		http://www.springframework.org/schema/mvc/spring-mvc.xsd
+		http://www.springframework.org/schema/tx 
+		http://www.springframework.org/schema/tx/spring-tx.xsd">
+
+	<!-- Add support for component scanning -->
+	<context:component-scan base-package="com.customerdemo" />
+
+	<!-- Add support for conversion, formatting and validation support -->
+	<mvc:annotation-driven/>
+
+	<!-- Define Spring MVC view resolver -->
+	<bean
+		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
+		<property name="prefix" value="/WEB-INF/view/" />
+		<property name="suffix" value=".jsp" />
+	</bean>
+
+    <!-- Step 1: Define Database DataSource / connection pool -->
+	<bean id="myDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
+          destroy-method="close">
+        <property name="driverClass" value="com.mysql.cj.jdbc.Driver" />
+        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/customercrud" />
+        <property name="user" value="root" />
+        <property name="password" value="root" />
+
+        <!-- these are connection pool properties for C3P0 -->
+		<property name="initialPoolSize" value="5"/>
+        <property name="minPoolSize" value="5" />
+        <property name="maxPoolSize" value="20" />
+        <property name="maxIdleTime" value="30000" />
+	</bean>  
+	
+    <!-- Step 2: Setup Hibernate session factory -->
+	<bean id="sessionFactory"
+		class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
+		<property name="dataSource" ref="myDataSource" />
+		<property name="packagesToScan" value="com.customerdemo" />
+		<property name="hibernateProperties">
+		   <props>
+		      <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</prop>
+		      <prop key="hibernate.show_sql">true</prop>
+			   <prop key="hibernate.hbm2ddl.auto">update</prop>
+		   </props>
+		</property>
+   </bean>	  
+
+    <!-- Step 3: Setup Hibernate transaction manager -->
+	<bean id="myTransactionManager"
+            class="org.springframework.orm.hibernate5.HibernateTransactionManager">
+        <property name="sessionFactory" ref="sessionFactory"/>
+    </bean>
+    
+    <!-- Step 4: Enable configuration of transactional behavior based on annotations -->
+	<tx:annotation-driven transaction-manager="myTransactionManager" />
+
+	<!-- Add support for reading web resources: css, images, js, etc ... -->
+	<mvc:resources location="/resources/" mapping="/resources/**"/>
+
+</beans>
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src/main/webapp/WEB-INF/view/customer-form.jsp

+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
+<html>
+<head>
+    <title>Add Customer</title>
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/resources/css/style.css">
+</head>
+
+<body>
+<div class="container">
+    <div class="wrapper">
+        <header class="header">
+            <h2>Customer Detail</h2>
+        </header>
+        <div class="form-wrapper">
+            <form:form cssClass="form" action="save" modelAttribute="customer" method="post">
+                <form:hidden path="id"/>
+                <div class="form-group">
+                    Name: <form:input path="name" class="form-control"/>
+                </div>
+                <div class="form-group">
+                    Email: <form:input path="email" class="form-control"/>
+                </div>
+                <div class="form-group">
+                    <input type="submit" class="btn">
+                </div>
+            </form:form>
+        </div>
+    </div>
+</div>
+</body>
+</html>

src/main/webapp/WEB-INF/view/customers-list.jsp

+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<html>
+
+<head>
+    <title>Customers List</title>
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/resources/css/style.css">
+</head>
+
+<body>
+    <div class="container">
+        <div class="wrapper">
+            <header class="header">
+                <h2>Customer Details</h2>
+            </header>
+            <div class="content">
+                <a href="show-customer-form" class="btn">Add Customer</a>
+                <table>
+                    <tr>
+                        <th>Name</th>
+                        <th>Email</th>
+                        <th>Action</th>
+                    </tr>
+                    <c:forEach var="customer" items="${customers}">
+                        <c:url var="updateLink" value="/customer/update-form">
+                            <c:param name="id" value="${customer.id}"/>
+                        </c:url>
+                        <c:url var="deleteLink" value="/customer/delete">
+                            <c:param name="id" value="${customer.id}"/>
+                        </c:url>
+                        <tr>
+                            <td>${customer.name}</td>
+                            <td>${customer.email}</td>
+                            <td>
+                                <a href="${updateLink}" class="btn-link">Update</a> |
+                                <a href="${deleteLink}" class="btn-link" onclick="if(!(confirm('Are you sure you want to delete this customer?'))) return false">Delete</a>
+                            </td>
+                        </tr>
+                    </c:forEach>
+                </table>
+            </div>
+        </div>
+    </div>
+</body>
\ No newline at end of file

src/main/webapp/WEB-INF/view/index.html

+<html>
+
+<head>
+    <title>Customer List</title>
+    <link rel="stylesheet" href="../../resources/css/style.css">
+</head>
+
+<body>
+    <div class="container">
+        <div class="wrapper">
+            <header class="header">
+                <h2>CRM Customer Relation Manager</h2>
+            </header>
+            <div class="form-wrapper">
+                <form action="save-customer" class="form">
+                    <div class="form-group">
+                        Name: <input type="text" class="form-control">
+                    </div>
+                    <div class="form-group">
+                        Email: <input type="text" class="form-control">
+                    </div>
+                    <div class="form-group">
+                        <input type="submit" class="btn">
+                    </div>
+                </form>
+            </div>
+        </div>
+    </div>
+</body>
+
+</html>
\ No newline at end of file

src/main/webapp/WEB-INF/web.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
+  <display-name>spring-mvc-customer-demo</display-name>
+
+  <welcome-file-list>
+    <welcome-file>index.jsp</welcome-file>
+    <welcome-file>index.html</welcome-file>
+  </welcome-file-list>
+
+  <servlet>
+    <servlet-name>dispatcher</servlet-name>
+    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
+    <init-param>
+      <param-name>contextConfigLocation</param-name>
+      <param-value>/WEB-INF/spring-mvc-crud-demo-servlet.xml</param-value>
+    </init-param>
+    <load-on-startup>1</load-on-startup>
+  </servlet>
+
+  <servlet-mapping>
+    <servlet-name>dispatcher</servlet-name>
+    <url-pattern>/</url-pattern>
+  </servlet-mapping>
+</web-app>
\ No newline at end of file

src/main/webapp/index.jsp

+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Customer List</title>
+</head>
+<body>
+    <% response.sendRedirect("customer/list"); %>
+</body>
+</html>

src/main/webapp/resources/css/style.css

+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+.container {
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+}
+.wrapper {
+  padding: 0 6rem;
+  width: 100%;
+}
+
+.header {
+  color: #ffffff;
+  text-align: center;
+  background-color: rgb(36, 114, 5);
+  padding: 1.6rem 0;
+}
+
+
+.btn {
+  display: inline-block;
+  color: #ffffff;
+  background-color: #2280ec;
+  padding: 0.6rem 1rem;
+  margin: 1rem 0;
+  border-radius: 3px;
+  text-decoration: none;
+  font-weight: 600;
+  border: none;
+  outline: none;
+  cursor: pointer;
+}
+
+.btn:hover {
+  background-color: #136dd3;
+}
+
+.content table {
+  width: 100%;
+  border-collapse: collapse;
+  text-align: left;
+}
+
+.content table tr,
+th,
+td {
+  padding: 1rem;
+  color: #000000;
+}
+
+.content table tr th {
+  background-color: rgb(221, 26, 26);
+  font-weight: bold;
+  font-size: 18px;
+  color: #000000;
+}
+
+.content table tr:nth-child(even) {
+  background-color: #c4c4c4;
+}
+.content table tr:nth-child(odd) {
+  background-color: #FF8A65;
+}
+.form-wrapper {
+  background-color: #f0ffff;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+}
+.form {
+  display: flex;
+  justify-content: center;
+  flex-direction: column;
+}
+
+.form-group {
+  margin-top: 1rem;
+}
+.form-control {
+  padding: 0.6rem 0.2rem;
+}
+
+.error{
+  color: #ff0000;
+}
+
+.btn-link{
+  text-decoration: none;
+  font-weight: 600;
+  color: #3b3b3b;
+}
+
+.btn-link:hover{
+  color: #000000;
+}
\ No newline at end of file