스프링 Querydsl 설치

build.gradle Querydsl 설정 추가

plugins {
	id 'org.springframework.boot' version '2.4.12'
	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
	//querydsl 추가
	id "com.ewerk.gradle.plugins.querydsl" version "1.0.10"
	id 'java'
}

group = 'study'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}

repositories {
	mavenCentral()
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
	implementation 'org.springframework.boot:spring-boot-starter-web'

	//querydsl 추가
	implementation 'com.querydsl:querydsl-jpa'
	
	compileOnly 'org.projectlombok:lombok'
	runtimeOnly 'com.h2database:h2'
	annotationProcessor 'org.projectlombok:lombok'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
	useJUnitPlatform()
}

//querydsl 추가 시작
def querydslDir = "$buildDir/generated/querydsl"
querydsl {
	jpa = true
	querydslSourcesDir = querydslDir
}
sourceSets {
	main.java.srcDir querydslDir
}
configurations {
	querydsl.extendsFrom compileClasspath
}
compileQuerydsl {
	options.annotationProcessorPath = configurations.querydsl
}

최신버전은 이렇게 설정(위 버전은 예전에 됐는데 현재 모르게 에러난다.)

buildscript {
   ext {
      queryDslVersion = "5.0.0"
   }
}

plugins {
   id 'org.springframework.boot' version '2.6.0'
   id 'io.spring.dependency-management' version '1.0.11.RELEASE'
   //querydsl 추가
   id "com.ewerk.gradle.plugins.querydsl" version "1.0.10"
   id 'java'
}

group = 'study'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '11'

configurations {
   compileOnly {
      extendsFrom annotationProcessor
   }
}

repositories {
   mavenCentral()
}

dependencies {
   implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
   implementation 'org.springframework.boot:spring-boot-starter-web'
   compileOnly 'org.projectlombok:lombok'
   runtimeOnly 'com.h2database:h2'
   //querydsl 추가
   implementation "com.querydsl:querydsl-jpa:${queryDslVersion}"
   implementation "com.querydsl:querydsl-apt:${queryDslVersion}"


   annotationProcessor 'org.projectlombok:lombok'
   testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
   useJUnitPlatform()
}

//querydsl 추가 시작
def querydslDir = "$buildDir/generated/querydsl"

querydsl {
   jpa = true
   querydslSourcesDir = querydslDir
}
sourceSets {
   main.java.srcDir querydslDir
}
compileQuerydsl{
   options.annotationProcessorPath = configurations.querydsl
}
configurations {
   compileOnly {
      extendsFrom annotationProcessor
   }
   querydsl.extendsFrom compileClasspath
}
//querydsl 추가 끝

 

 

테스트 Entity 생성

package study.querydsl.entity;

import lombok.Getter;
import lombok.Setter;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
@Getter @Setter
public class Hello {

    @Id
    @GeneratedValue
    private Long id;
}

그래들 설치 끝나면 gradle -> Tasks -> other -> compileQuerydsl  더블클릭

build -> generated -> querydsl -> 패키지 확인 -> QHello 확인

 

Querydsl 테스트 코드 작성

package study.querydsl;

import com.querydsl.jpa.impl.JPAQueryFactory;
import org.assertj.core.api.Assertions;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.transaction.annotation.Transactional;
import study.querydsl.entity.Hello;
import study.querydsl.entity.QHello;

import javax.persistence.EntityManager;

import static org.assertj.core.api.Assertions.assertThat;

@SpringBootTest
@Transactional
class QuerydslApplicationTests {

	@Autowired
	EntityManager em;



	@Test
	void contextLoads() {
		Hello hello = new Hello();
		em.persist(hello);

		JPAQueryFactory query = new JPAQueryFactory(em);
		QHello qHello = new QHello("h");
		// QHello 생성코드
//		QHello qHello = QHello.hello;

		Hello result = query
				.selectFrom(qHello)
				.fetchOne();


		assertThat(result).isEqualTo(hello);
		assertThat(result.getId()).isEqualTo(hello.getId());
	}

}

 

빈등록해서 편하게 사용

@Bean
JPAQueryFactory jpaQueryFactory(EntityManager entityManager) {
   return new JPAQueryFactory(entityManager);
}