fix : Change to JPA function

build.gradle

@@ -1,27 +1,28 @@
 plugins {
-	id 'java'
-	id 'org.springframework.boot' version '2.7.7'
-	id 'io.spring.dependency-management' version '1.0.15.RELEASE'
+    id 'java'
+    id 'org.springframework.boot' version '2.7.7'
+    id 'io.spring.dependency-management' version '1.0.15.RELEASE'
 }
 
 group = 'hello'
 version = '0.0.1-SNAPSHOT'
 sourceCompatibility = '8'
 
 repositories {
-	mavenCentral()
+    mavenCentral()
 }
 
 dependencies {
-	implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
-	implementation 'org.springframework.boot:spring-boot-starter-web'
-	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
 
-	implementation 'org.springframework.boot:spring-boot-starter-jdbc'
-	runtimeOnly 'com.h2database:h2'
+    //	implementation 'org.springframework.boot:spring-boot-starter-jdbc'
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    runtimeOnly 'com.h2database:h2'
 
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 
 tasks.named('test') {
-	useJUnitPlatform()
+    useJUnitPlatform()
 }

src/main/java/hello/hellospring/SpringConfig.java

@@ -1,20 +1,24 @@
 package hello.hellospring;
 
+import javax.persistence.EntityManager;
 import javax.sql.DataSource;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
-import hello.hellospring.repository.JdbcTemplateMemberRepository;
+import hello.hellospring.repository.JpaMemberRepository;
 import hello.hellospring.repository.MemberReository;
 import hello.hellospring.service.MemberService;
 
 @Configuration
 public class SpringConfig {
 
 	private final DataSource dataSource;
-	public SpringConfig(DataSource dataSource) {
+	private final EntityManager em;
+
+	public SpringConfig(DataSource dataSource, EntityManager em) {
 		this.dataSource = dataSource;
+		this.em = em;
 	}
 
 	@Bean
@@ -25,6 +29,7 @@ public MemberService memberService() {
 	public MemberReository memberRepository() {
 		// return new MemoryMemberRepository();
 		// return new JdbcMemberRepository(dataSource);
-		return new JdbcTemplateMemberRepository(dataSource);
+		// return new JdbcTemplateMemberRepository(dataSource);
+		return new JpaMemberRepository(em);
 	}
 }

src/main/java/hello/hellospring/domain/Member.java

@@ -1,6 +1,14 @@
 package hello.hellospring.domain;
 
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+
+@Entity
 public class Member {
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
 	private Long id;
 	private String name;
 

src/main/java/hello/hellospring/repository/JpaMemberRepository.java

@@ -0,0 +1,42 @@
+package hello.hellospring.repository;
+
+import java.util.List;
+import java.util.Optional;
+
+import javax.persistence.EntityManager;
+
+import hello.hellospring.domain.Member;
+
+public class JpaMemberRepository implements MemberReository {
+	private final EntityManager em;
+
+	public JpaMemberRepository(EntityManager em) {
+		this.em = em;
+	}
+
+	@Override
+	public Member save(Member member) {
+		em.persist(member);
+		return member;
+	}
+
+	@Override
+	public Optional<Member> findById(Long id) {
+		Member member = em.find(Member.class, id);
+		return Optional.ofNullable(member);
+	}
+
+	@Override
+	public Optional<Member> findByName(String name) {
+		List<Member> result = em.createQuery("select m from Member m where m.name = :name", Member.class)
+			.setParameter("name", name)
+			.getResultList();
+		return result.stream().findAny();
+	}
+
+	@Override
+	public List<Member> findAll() {
+		return em.createQuery("select  m from Member m", Member.class) // 객체 대상으로 날리는 쿼리
+			.getResultList();
+	}
+}

src/main/java/hello/hellospring/service/MemberService.java

@@ -3,10 +3,12 @@
 import java.util.List;
 import java.util.Optional;
 
+import org.springframework.transaction.annotation.Transactional;
+
 import hello.hellospring.domain.Member;
 import hello.hellospring.repository.MemberReository;
 
-
+@Transactional
 public class MemberService {
 
 	// private final MemberReository memberReository = new MemoryMemberRepository();

src/main/resources/application.properties

@@ -2,4 +2,7 @@ spring.output.ansi.enabled=always
 spring.datasource.url=jdbc:h2:tcp://localhost/~/test
 spring.datasource.driver-class-name=org.h2.Driver
 spring.datasource.username=sa
-spring.datasource.password=
+spring.datasource.password=
+
+spring.jpa.show-sql=true
+spring.jpa.hibernate.ddl-auto=none