now-study · pear1220 · Jul 24, 2023 · Jul 28, 2023
diff --git a/.gitignore b/.gitignore
@@ -15,3 +15,130 @@ buildNumber.properties
 .project
 # JDT-specific (Eclipse Java Development Tools)
 .classpath
+### Java template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*
+
+### Maven template
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+# https://github.com/takari/maven-wrapper#usage-without-binary-jar
+.mvn/wrapper/maven-wrapper.jar
+
+# Eclipse m2e generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
+
+### JetBrains template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+.idea/*
+*.iml
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
diff --git a/pom.xml b/pom.xml
@@ -0,0 +1,88 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>jpa-basic</groupId>
+    <artifactId>ex1-hello-jpa</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <!-- 기본 설정 -->
+        <java.version>17</java.version>
+        <!-- 프로젝트 코드 인코딩 설정 -->
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+
+        <!-- JPA, 하이버네이트 버전 -->
+        <hibernate.version>5.5.7.Final</hibernate.version>
+        <!-- 데이터베이스 버전 -->
+        <h2db.version>2.2.220</h2db.version>
+        <slf4j-version>2.0.6</slf4j-version>
+        <logback.version>1.4.7</logback.version>
+    </properties>
+    <dependencies>
+        <!-- JPA, 하이버네이트 -->
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-entitymanager</artifactId>
+            <version>${hibernate.version}</version>
+        </dependency>
+        <!-- H2 데이터베이스 -->
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <version>${h2db.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.28</version>
+            <scope>provided</scope>
+        </dependency>
+        <!-- Logging -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j-version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>jcl-over-slf4j</artifactId>
+            <version>${slf4j-version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-log4j12</artifactId>
+            <version>${slf4j-version}</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>${logback.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>RELEASE</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
diff --git a/src/main/java/hellojpa/Jpa2.java b/src/main/java/hellojpa/Jpa2.java
@@ -0,0 +1,85 @@
+package hellojpa;
+
+
+import hellojpa.model.Member;
+import lombok.extern.slf4j.Slf4j;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.EntityTransaction;
+import javax.persistence.Persistence;
+import java.util.List;
+
+@Slf4j
+public class Jpa2 {
+    public Jpa2(EntityManagerFactory emf) {
+        EntityManager em = emf.createEntityManager();
+        EntityTransaction tx = em.getTransaction();
+        tx.begin();
+        try{
+            // 추가
+//            insertMember(em, tx);
+            // 조회
+//            selectMember(em);
+            // 수정
+//            updateMember(em, tx);
+
+            // 삭제
+//            deleteMember(em, tx);
+
+            // JPQL
+            jpql(em);
+
+
+//            tx.commit();
+        } catch (Exception e){
+            tx.rollback();
+        } finally {
+            em.close();
+        }
+        emf.close();
+    }
+
+    // JPQL
+    private void jpql(EntityManager em) {
+        List<Member> result = em.createQuery("select m from Member as m", Member.class)
+                .setFirstResult(5)
+                .setMaxResults(8)
+                .getResultList();
+
+        for (Member member : result) {
+            System.out.println("member.name = " + member.getName());
+        }
+    }
+
+    // 추가
+    private static void insertMember(EntityManager em, EntityTransaction tx) {
+        Member member = new Member();
+        member.setId(1L);
+        member.setName("HelloA");
+        em.persist(member);
+        tx.commit();
+    }
+
+    // 조회
+    private static void selectMember(EntityManager em) {
+        Member findMember = em.find(Member.class, 1L);
+    }
+
+    // 수정
+    private static void updateMember(EntityManager em, EntityTransaction tx) {
+        Member findMember = em.find(Member.class, 1L);
+        findMember.setName("HelloJPA");
+        tx.commit();
+    }
+
+    // 삭제
+    private static void deleteMember(EntityManager em, EntityTransaction tx) {
+        // 엔티티 조회, 영속 상태
+        Member memberA = em.find(Member.class, "memberA");
+        em.remove(memberA);
+        tx.commit();
+    }
+
+
+}