used-querydsl

pom.xml

@@ -111,6 +111,24 @@
             <scope>test</scope>
         </dependency>
 
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.4.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.querydsl</groupId>
+            <artifactId>querydsl-apt</artifactId>
+            <version>5.0.0</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.querydsl</groupId>
+            <artifactId>querydsl-jpa</artifactId>
+            <version>5.0.0</version>
+        </dependency>
+
     </dependencies>
 
     <build>
@@ -145,6 +163,22 @@
 
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>com.mysema.maven</groupId>
+                <artifactId>apt-maven-plugin</artifactId>
+                <version>1.1.3</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>process</goal>
+                        </goals>
+                        <configuration>
+                            <outputDirectory>target/generated-sources/java</outputDirectory>
+                            <processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
 
         </plugins>
     </build>

src/main/java/com/school/project/controller/QueryDslController.java

+package com.school.project.controller;
+
+import com.querydsl.core.types.Predicate;
+import com.school.project.model.Student;
+import com.school.project.service.student.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.querydsl.binding.QuerydslPredicate;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/query")
+public class QueryDslController {
+
+    @Autowired
+    private StudentService studentService;
+
+
+    @GetMapping
+    public Iterable<Student> getStudent(@QuerydslPredicate(root = Student.class) Predicate predicate) {
+        return studentService.getStudentByPredicate(predicate);
+    }
+
+}

src/main/java/com/school/project/repository/StudentRepository.java

@@ -2,14 +2,16 @@ package com.school.project.repository;
 
 import com.school.project.model.Student;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.querydsl.QuerydslPredicateExecutor;
 
-import java.util.List;
 
-public interface StudentRepository extends JpaRepository<Student, Long> {
+public interface StudentRepository extends JpaRepository<Student, Long>, QuerydslPredicateExecutor<Student> {
 
     Student findByStudentId(Long id);
 
     Student findByStudentName(String name);
 
     Student findByRollNumber(String rollNumber);
+
+
 }

src/main/java/com/school/project/repository/userRegistration/UserRepository.java

@@ -2,12 +2,16 @@ package com.school.project.repository.userRegistration;
 
 import com.school.project.model.userRegistration.User;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.querydsl.QuerydslPredicateExecutor;
+import org.springframework.data.querydsl.binding.QuerydslBinderCustomizer;
+import org.springframework.data.querydsl.binding.QuerydslPredicateBuilder;
 import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
 
 @Repository
-public interface UserRepository extends JpaRepository<User, Long> {
+public interface UserRepository extends JpaRepository<User, Long>, QuerydslPredicateExecutor<User> {
     Optional<User> findUserByEmail(String email);
+
     User findOneByUserId(Long id);
 }

src/main/java/com/school/project/security/OAuth2ServerConfiguration.java

@@ -49,7 +49,7 @@ public class OAuth2ServerConfiguration {
                     .and()
                     .authorizeRequests()
                     .antMatchers("/register/**").permitAll()
-                    .antMatchers("/student/**").hasAuthority("STUDENT")
+                    .antMatchers("/student/**") .hasAuthority("STUDENT")
                     .antMatchers("/department/**", "/course/**","/admin/**").hasAuthority("ADMIN");
         }
     }

src/main/java/com/school/project/service/student/StudentService.java

 package com.school.project.service.student;
 
+import com.querydsl.core.types.Predicate;
 import com.school.project.dto.student.StudentCoursesDTO;
 import com.school.project.dto.student.StudentViewDataDTO;
+import com.school.project.model.Student;
 
 public interface StudentService {
 
@@ -10,4 +12,6 @@ public interface StudentService {
     public Long getUserId(String username);
 
     public StudentCoursesDTO viewCourses(Long id);
+
+    Iterable<Student> getStudentByPredicate(Predicate predicate);
 }

src/main/java/com/school/project/service/student/StudentServiceImpl.java

 package com.school.project.service.student;
 
+import com.querydsl.core.types.Predicate;
 import com.school.project.dto.student.StudentCoursesDTO;
 import com.school.project.dto.student.StudentViewDataDTO;
 import com.school.project.mapper.StudentCoursesMapper;
 import com.school.project.mapper.StudentViewDataMapper;
+import com.school.project.model.Student;
 import com.school.project.model.userRegistration.User;
 import com.school.project.repository.StudentRepository;
 import com.school.project.repository.userRegistration.UserRepository;
@@ -47,6 +49,11 @@ public class StudentServiceImpl implements StudentService {
 
         return studentCoursesMapper.modelToDto(studentRepository.findByStudentId(id));
     }
+
+    @Override
+    public Iterable<Student> getStudentByPredicate(Predicate predicate) {
+        return studentRepository.findAll(predicate);
+    }
 }
 
 

src/main/resources/application.properties

-
 spring.jpa.hibernate.ddl-auto=update
-spring.datasource.url=jdbc:mysql://localhost:3306/school-portal
-spring.datasource.username=root
-spring.datasource.password=charlie123
-
-
-spring.security.user.name= sulemantalpur6@gmail.com
+spring.datasource.url=jdbc:postgresql://localhost:5432/school-portal
+spring.datasource.username=postgres
+spring.datasource.password=root
+spring.jpa.database=postgresql
+spring.jpa.properties.hibernate.default_schema=public
+#spring.sql.init.mode=always
+spring.jpa.defer-datasource-initialization=true
+spring.datasource.data=classpath:data.sql
+spring.security.user.name=sulemantalpur6@gmail.com
 spring.security.user.password=charlie
-
 spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration
 spring.mvc.view.prefix=/static
-
 server.error.include-message=always
 
-spring.datasource.data=classpath:data.sql
\ No newline at end of file