Spring2.5.6开发环境搭建图文教程

package com.bjsxt.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;
 }
}

package com.bjsxt.dao;

import com.bjsxt.model.User;

public interface UserDAO {
 public void save(User u);
}

package com.bjsxt.dao.impl;

import com.bjsxt.dao.UserDAO;
import com.bjsxt.model.User;

public class UserDAOImpl implements UserDAO{

 public void save(User u) {
 System.out.println("a user saved!");
 }

}

package com.bjsxt.service;

import com.bjsxt.dao.UserDAO;
import com.bjsxt.model.User;

public class UserService {
 
 private UserDAO userDAO;
 
 public void addUser(User u){
 this.userDAO.save(u);
 }

 public UserDAO getUserDAO() {
 return userDAO;
 }

 public void setUserDAO(UserDAO userDAO) {
 this.userDAO = userDAO;
 }
}

<?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.bjsxt.dao.impl.UserDAOImpl"></bean>

 <bean id="userService" class="com.bjsxt.service.UserService">
 <property name="userDAO">
 <ref bean="u"/>
 </property>
 </bean>

</beans>

package com.bjsxt.service;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.bjsxt.model.User;

public class UserServiceTest {

 @Test
 public void testAddUser() throws Exception {
 ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");//初始化ApplicationContext对象，加载配置文件beans.xml
 
 UserService service = (UserService)ctx.getBean("userService");//从容器中取
 User u = new User();
 u.setUsername("zhangsan");
 u.setPassword("zhangsan");
 service.addUser(u);//容器中已经配置了UserDAOImpl了，并把DAOImpl注入到service之中，所以service直接就可以保存了
 }

}