springboot整合queryDSL最新

springboot2.5整合queryDSL5.0最新

主要配置

1. idea下載JPA Buddy插件

2. 依賴引入

           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-data-jpa</artifactId>
           </dependency>
   
           <dependency>
               <groupId>com.querydsl</groupId>
               <artifactId>querydsl-jpa</artifactId>
               <version>5.0.0</version>
           </dependency>
   
           <dependency>
               <groupId>com.querydsl</groupId>
               <artifactId>querydsl-apt</artifactId>
               <version>5.0.0</version>
           </dependency>
   
           <dependency>
               <groupId>com.querydsl</groupId>
               <artifactId>querydsl-core</artifactId>
               <version>5.0.0</version>
           </dependency>
   
   

       <build>
           <plugins>
               <plugin>
                   <groupId>org.springframework.boot</groupId>
                   <artifactId>spring-boot-maven-plugin</artifactId>
               </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>
   

3. 代碼配置

   @Configuration
   public class JPAQueryFactoryConfiguration {
   
       @PersistenceContext
       private EntityManager entityManager;
   
       @Bean
       public JPAQueryFactory jpaQueryFactory() {
           return new JPAQueryFactory(entityManager);
       }
   }
   

4. SQL工具類

   @Component
   public class Dsl {
   
       public static JPAQueryFactory factory;
       @Resource
       private JPAQueryFactory jpaQueryFactory;
   
       @PostConstruct
       private void init() {
           factory = jpaQueryFactory;
       }
   
   }
   

5. sql調用樣例

   @Service
   public class UserInfoServiceImpl implements UserInfoService {
   
   
       QUserInfo qUserInfo = QUserInfo.userInfo;
   
       @Override
       public List<UserInfo> getUserList() {
   
           return Dsl.factory
                   .select(qUserInfo)
                   .from(qUserInfo)
                   .fetch();
       }
   }
   

6. 代碼啟動前先點擊maven compile在target -> generated-sources -> java下會生成實體類的Q類