1장: 스프링의 IoC - 오브젝트 팩토리를 이용한 스프링 IoC

ApplicationContext 를 통해, annotation으로 설정하기

어플리케이션컨텍스트는 빈의 생성, 관계설정 등의 제어를 총괄한다.

build.gradle

@@ -20,6 +20,12 @@ dependencies {
 
     /* oracle jdbc driver */
     compile files('libs/ojdbc6-11.2.0.3.jar')
+    compile group: 'cglib', name: 'cglib', version: '2.2.2'
+    compile group: 'commons-logging', name: 'commons-logging', version: '1.2'
+    compile group: 'org.springframework', name: 'spring-beans', version: '5.2.1.RELEASE'
+    compile group: 'org.springframework', name: 'spring-context', version: '5.2.2.RELEASE'
+    compile group: 'org.springframework', name: 'spring-expression', version: '5.2.4.RELEASE'
+    compile group: 'org.springframework', name: 'spring-core', version: '5.2.1.RELEASE'
 
     testRuntimeOnly("org.junit.platform:junit-platform-launcher:1.6.0")
     testRuntimeOnly("org.junit.platform:junit-platform-engine:1.6.0")

src/main/java/com/toby/tobyspring/MainTest.java

@@ -1,16 +1,17 @@
 package com.toby.tobyspring;
 
-import com.toby.tobyspring.user.dao.ConnectionMaker;
-import com.toby.tobyspring.user.dao.DUserConnectionMaker;
 import com.toby.tobyspring.user.dao.DaoFactory;
 import com.toby.tobyspring.user.dao.UserDao;
 import com.toby.tobyspring.user.domain.User;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
 
 import java.sql.SQLException;
 
 public class MainTest {
     public static void main(String[] args) throws SQLException, ClassNotFoundException {
-        UserDao userDao = new DaoFactory().userDao();
+        ApplicationContext context = new AnnotationConfigApplicationContext(DaoFactory.class);
+        UserDao userDao = context.getBean("userDao", UserDao.class);
 
         User user = new User();
         user.setId("dahyekim");

src/main/java/com/toby/tobyspring/user/dao/DUserConnectionMaker.java

@@ -8,7 +8,7 @@ public class DUserConnectionMaker implements ConnectionMaker {
     @Override
     public Connection makeNewConnection() throws ClassNotFoundException, SQLException {
         Class.forName("oracle.jdbc.driver.OracleDriver");
-        Connection connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "dahye", "dahye");
+        Connection connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "dahye", "test");
         return connection;
     }
 }

src/main/java/com/toby/tobyspring/user/dao/DaoFactory.java

@@ -1,10 +1,16 @@
 package com.toby.tobyspring.user.dao;
 
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
 public class DaoFactory {
+    @Bean
     public UserDao userDao() {
         return new UserDao(connectionMaker());
     }
 
+    @Bean
     public ConnectionMaker connectionMaker() {
         return new DUserConnectionMaker();
     }