Spring Data JPA Simple Example

Transcription

1 Spring Data JPA Simple Example Spring Boot, WEB MVC, Spring Data JPA, Maria DB 를이용하여간단히예제를만들어보자. 프로젝트생성 마리아 DB 설치는아래 URL 참조 STS 에서 File -> New Project -> Spring Starter Project 다음화면에서 Data -> JPA, DataBase -> MySQL, WEB -> Web 선택

2 src/main/resources/application.properties spring.datasource.platform=mysql spring.datasource.sql-script-encoding=utf-8 spring.datasource.url=jdbc:mysql://localhost/jpa_emp?createdatabaseifnotexist=true spring.datasource.username=root spring.datasource.password=1111 spring.datasource.driver-class-name=com.mysql.jdbc.driver spring.datasource.test-on-borrow=true spring.jpa.show-sql=true # 엔티티클래스를기반으로테이블을자동갱신 / 생성하도록 spring.jpa.hibernate.ddl-auto=update logging.level.jpa=debug spring.mvc.view.prefix=/web-inf/views/ spring.mvc.view.suffix=.jsp 도메인클래스 (Emp.java) 테이블구조와동일하다. package jpa.domain; import javax.persistence.entity; import javax.persistence.generatedvalue; import public class private Integer empno; private String ename; public Emp() { public Emp(String ename) { this.ename = ename; public Integer getempno() { return empno; public void setempno(integer empno) { this.empno = empno; public String getename() { return ename; public void setename(string ename) { this.ename = ename; 레포지토리클래스 (EmpRepository.java)

3 package jpa.repository; import org.springframework.data.jpa.repository.jparepository; //JpaRepository를상속받으며매개변수로도메인클래스와키타입을기술한다. public interface EmpRepository extends JpaRepository<Emp, Integer> { 서비스인터페이스및구현클래스 (EmpService.java, EmpServiceImpl.java) package jpa.service; import java.util.list; public interface EmpService { Emp save(emp e); void delete(integer empno); Emp getemp(integer empno); List<Emp> getallemp(); package jpa.service; import java.util.list; import org.springframework.beans.factory.annotation.autowired; import org.springframework.stereotype.service; import public class EmpServiceImpl implements EmpService EmpRepository emprepository; public Emp save(emp e) { return emprepository.save(e); public void delete(integer empno) { emprepository.delete(empno);

4 public Emp getemp(integer empno) { return emprepository.findone(empno); public List<Emp> getallemp() { return emprepository.findall(); 컨트롤러클래스 (EmpController.java) package jpa.controller; import java.util.list; import org.springframework.beans.factory.annotation.autowired; import org.springframework.web.bind.annotation.pathvariable; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestmethod; import org.springframework.web.bind.annotation.restcontroller; public class EmpController EmpService empservice; // = "/get/{empno", method = RequestMethod.GET) public Emp get(@pathvariable Integer empno) { return empservice.getemp(empno); // = "/save", method = RequestMethod.GET) public Emp add(emp emp) { return empservice.save(emp);

5 // = "/save/{ename", method = RequestMethod.GET) public Emp add2(@pathvariable String ename) { return empservice.save(new Emp(ename)); // = "/delete/{empno", method = RequestMethod.GET) public void delete(@pathvariable Integer empno) { empservice.delete(empno); // = "/getall", method = RequestMethod.GET) public List<Emp> getall() { return empservice.getallemp(); 스프링부트메인클래스 (SpringJpaExamApplication.java) package jpa; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.commandlinerunner; import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication; import public class SpringjpaexamApplication implements CommandLineRunner { public static void main(string[] args) { SpringApplication.run(SpringjpaexamApplication.class, EmpService empservice;

6 // 초기데이터생성 public void run(string...args) { empservice.save(new Emp(" 가길동 ")); empservice.save(new Emp(" 나길동 ")); empservice.save(new Emp(" 다길동 "));