原始注解的使用案例

src/main/java/Main.java

@@ -1,3 +1,4 @@
+import com.Config.JdbcData;
 import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.pool.DruidPooledConnection;
 import com.controller.UserController;
@@ -20,6 +21,7 @@ public class Main {
         UserService bean = applicationContext.getBean(UserServiceImpl.class);
 //        DruidDataSource dataSource = (DruidDataSource) beanFactory.getBean("dataSource");
         DruidDataSource dataSource = beanFactory.getBean(DruidDataSource.class);
+ //       JdbcData bean1 = beanFactory.getBean(JdbcData.class);
         DruidPooledConnection connection = dataSource.getConnection();
         connection.close();
         // userService1 在 xml文件中定义

src/main/java/StudentMain.java

@@ -0,0 +1,12 @@
+import com.service.StudentService;
+import com.service.impl.StudentServiceImpl;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+public class StudentMain {
+    public static void main(String[] args) {
+        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("context.xml");
+        StudentService service = applicationContext.getBean(StudentServiceImpl.class);
+        service.showStudent();
+    }
+}

src/main/java/com/Config/JdbcData.java

@@ -0,0 +1,10 @@
+package com.Config;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+@Component
+public class JdbcData {
+    @Value("${jdbc.url}")
+    private String url;
+}

src/main/java/com/controller/UserController.java

@@ -1,7 +1,16 @@
 package com.controller;
 
+import com.Config.JdbcData;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Controller;
 
 @Controller
 public class UserController {
+    @Autowired
+    private JdbcData jdbcData;
+    @Value("zxy")
+    private String name;
+    @Value("1971")
+    private Integer age;
 }

src/main/java/com/dao/StudentDao.java

@@ -0,0 +1,5 @@
+package com.dao;
+
+public interface StudentDao {
+    public void showStudent();
+}

src/main/java/com/dao/imp/StudentDaoImpl.java

@@ -0,0 +1,13 @@
+package com.dao.imp;
+
+import com.dao.StudentDao;
+import org.springframework.stereotype.Repository;
+
+//<bean id="studentDao" class="com.dao.imp.StudentDaoImpl"></bean>
+@Repository
+public class StudentDaoImpl implements StudentDao {
+    @Override
+    public void showStudent() {
+        System.out.println("show...");
+    }
+}

src/main/java/com/service/StudentService.java

@@ -0,0 +1,5 @@
+package com.service;
+
+public interface StudentService {
+    public void showStudent();
+}

src/main/java/com/service/impl/StudentServiceImpl.java

@@ -0,0 +1,24 @@
+package com.service.impl;
+
+import com.dao.StudentDao;
+import com.service.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Service;
+
+import javax.annotation.Resource;
+
+//<bean id="studentService" class="com.service.impl.StudentServiceImpl">
+@Service
+public class StudentServiceImpl implements StudentService {
+//    <property name="studentDao" ref="studentDao"></property>
+//    @Autowired
+//    @Qualifier("studentDao") // 按照id名称值从容器中进行匹配 配合autowired一起使用
+//    @Resource(name = "studentDao") // resource相当于 autowired+qualifier
+    @Autowired
+    private StudentDao studentDao;
+    @Override
+    public void showStudent() {
+        studentDao.showStudent();
+    }
+}

src/main/java/com/service/impl/UserServiceImpl.java

@@ -5,4 +5,5 @@ import org.springframework.stereotype.Service;
 @Service("UserServiceImpl")
 public class UserServiceImpl implements UserService {
 
+
 }

src/main/resources/context.xml

@@ -18,5 +18,6 @@
         <property name="username" value="${jdbc.username}"></property>
         <property name="password" value="${jdbc.password}"></property>
     </bean>
+    <!--    组件扫描-->
     <context:component-scan base-package="com"></context:component-scan>
 </beans>

src/test/java/CommonTest1.java

@@ -0,0 +1,13 @@
+import com.Config.JdbcData;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+
+public class CommonTest1 {
+    @Autowired
+    JdbcData jdbcData;
+    @Test
+    public void testValue() {
+        System.out.println(jdbcData);
+    }
+}

src/test/java/DataSourceTest.java

@@ -2,6 +2,7 @@ import com.alibaba.druid.pool.DruidDataSource;
 import com.alibaba.druid.pool.DruidPooledConnection;
 import com.mchange.v2.c3p0.ComboPooledDataSource;
 import org.junit.Test;
+import org.springframework.beans.factory.annotation.Value;
 
 import java.sql.Connection;
 import java.util.ResourceBundle;
@@ -14,6 +15,8 @@ public class DataSourceTest {
      * 测试c3p0数据源
      * @throws Exception
      */
+
+
     @Test
     public void c3p0Test() throws Exception{
         ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();