Spring学习笔记（七）模拟实际开发过程的调用过程XML版-Setter方式注入

模拟实际开发过程的调用过程XML版-Setter方式注入

源码获取github

1.项目结构

2.jar包跟上个一样

3.重写set方法

UserServiceImpl.java

private UserDao userDao;

public void setUserDao(UserDao userDao) {
   this.userDao = userDao;
}

beans.xml

<bean id="userDaoImpl" class="com.hs.dao.impl.UserDaoImpl"/>
<!--相当于userDao = new userDaoImpl()-->
<bean id="userServiceImpl" class="com.hs.service.impl.UserServiceImpl">
   <property name="userDao">
      <ref bean="userDaoImpl"/>
   </property>
</bean>

在set方法里代替完成了，private UserDao userDao = new userDaoImpl();

UserController.java

private UserService userService;

public void setUserService(UserService userService) {
   this.userService = userService;
}

beans.xml

<bean id="userServiceImpl" class="com.hs.service.impl.UserServiceImpl">
   <property name="userDao">
      <ref bean="userDaoImpl"/>
   </property>
</bean>
<!--先UserController = new UserController() 再userService = new userServiceImpl(); -->
<bean id="userController" class="com.hs.web.UserController" p:userService-ref="userServiceImpl">
   <!--<property name="userService" ref="userServiceImpl"/>-->
</bean>

在set方法里代替完成了private UserService userService = new userServiceImpl();

4.测试

package com.hs.test;

import com.hs.web.UserController;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MethodTest {
   @Test
   public void test01() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("beans.xml");
      UserController controller = applicationContext.getBean("userController", UserController.class);
      controller.add();
   }
}

控制台输出：

UserController层—>ADD
UserService层的实现类—>ADD
UserDao层的实现类—>ADD