Spring_Demo1 使用XMl配置IOC

 实例说明IoC注入方式

      IoC有3种注入方式：接口注入、Setter方法注入、构造器注入。由于接口注入不推荐使用，所以只介绍setter方法注入和构造器注入(后面介绍)。

利用spring一步一步搭建起一个例子(本人采用eclipse)

/**
 * Dao主要做数据库的交互工作
 * Modle 是模型 存放你的实体类
 *Service 做相应的业务逻辑处理
 *Action是一个控制器
 * @author syw
 *
 */

Bean.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">  <bean id="u" class="com.dao.impl.UserDaoImpl">  </bean>  <bean id="userService" class="com.service.UserService">  <property name="userDAO" ref="u" />    </bean>  </beans>

modle:实体类

package com.model;public class User {private String username;private String password;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

 Dao 数据库

package com.dao;import com.model.User;public interface UserDAO {public void saveMySql(User user);public void saveOracle(User user);}

DaoImpl 实现（数据不一样，不一样的实现）

package com.dao.impl;import com.dao.UserDAO;import com.model.User;public class UserDaoImpl implements UserDAO{@Overridepublic void saveMySql(User user) {System.out.println("Mysql: " + user.getUsername());}@Overridepublic void saveOracle(User user) {System.out.println("Oracle: " + user.getPassword());}}

service 业务逻辑处理

package com.service;import com.dao.UserDAO;import com.model.User;public class UserService {private UserDAO userDAO;  public void add(User user) {userDAO.saveMySql(user);}public UserDAO getUserDAO() {return userDAO;}public void setUserDAO(UserDAO userDAO) {this.userDAO = userDAO;}}

service 测试类

package com.service;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.model.User;/** * Dao主要做数据库的交互工作 * Modle 是模型 存放你的实体类 *Service 做相应的业务逻辑处理 *Action是一个控制器 * @author tao.zeng * */public class UserServiceTest {@Testpublic void testAdd() throws Exception {ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");UserService service = (UserService)ctx.getBean("userService");User u = new User();u.setUsername("syw");u.setPassword("syw");service.add(u);}}

代码运行：Mysql: syw

源码地址：点击下载