package dao;import java.util.List;import model.User;public interface UserDao {	public User getUser(int i);		public List<User> getAllUser();		public int insertUser(User u);		public int updateUser(User u);		public int deleteUser(int i);	}

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="dao.UserDao"> 	<select id="getUser" parameterType="int" 		resultType="User">		select * from t_user where id=#{id}	</select>	<select id="getAllUser" resultType="User">	select * from t_user	</select>	<delete id="deleteUser" parameterType="int" >	delete from t_user where id=#{id}	</delete>	<update id="updateUser" parameterType="User">	update t_user set username=#{username}, password=#{password} where id=#{id}	</update>	<insert id="insertUser" parameterType="User">	insert into t_user(username,password) values(#{username},#{password})	</insert>	</mapper>

package model;import org.springframework.context.annotation.Scope;import org.springframework.stereotype.Component;@Component@Scope("prototype")public class User {	private int id;	private String username;	private String password;	public User() {		super();			}		public User(String username, String password) {		super();		this.username = username;		this.password = password;	}	public int getId() {		return id;	}	public void setId(int id) {		this.id = id;	}	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 service;import java.util.List;import model.User;public interface IUserSrv {	public User getUser(int i);		public List<User> getAllUser();		public int insertUser(User u);		public int updateUser(User u);		public int deleteUser(int i);}

package service;import java.util.List;import javax.annotation.Resource;import org.springframework.stereotype.Component;import org.springframework.transaction.annotation.Transactional;import dao.UserDao;import model.User;@Component@Transactionalpublic class UserSrv implements IUserSrv {@Resourceprivate  UserDao userDao;		@Override		public User getUser(int i) {		// TODO 自动生成的方法存根				return userDao.getUser(i);	}	@Override	public List<User> getAllUser() {		// TODO 自动生成的方法存根		return userDao.getAllUser();	}	@Override	public int insertUser(User u) {		// TODO 自动生成的方法存根		return userDao.insertUser(u);	}	@Override	public int updateUser(User u) {		// TODO 自动生成的方法存根		return userDao.updateUser(u);	}	@Override	public int deleteUser(int i) {		// TODO 自动生成的方法存根		return userDao.deleteUser(i);	}}

package test;import javax.annotation.Resource;import org.springframework.stereotype.Component;import model.User;import service.IUserSrv;import util.BeanHelper;@Componentpublic class Test {	@Resource	private User user;	public static void main(String[] args) {		IUserSrv userSrv = (IUserSrv) BeanHelper.getBean("userSrv");		System.out.println(userSrv.getUser(1).getUsername());		Test t = (Test) BeanHelper.getBean("test");		t.user.setUsername("dd");		t.user.setPassword("xxx");		System.out.println(userSrv.insertUser(t.user));	}}

package util;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class BeanHelper {	private BeanHelper(){}	private static ApplicationContext ac = new ClassPathXmlApplicationContext("spring.xml"); 			public static Object getBean(String beanName){	return ac.getBean(beanName);			}}

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"	xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"	xsi:schemaLocation="		http://www.springframework.org/schema/beans		http://www.springframework.org/schema/beans/spring-beans-3.2.xsd		http://www.springframework.org/schema/context		http://www.springframework.org/schema/context/spring-context-3.2.xsd		http://www.springframework.org/schema/tx		http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">			<!-- 1. 数据源 : DriverManagerDataSource -->	<context:annotation-config></context:annotation-config>	<bean id="datasource"		class="org.springframework.jdbc.datasource.DriverManagerDataSource">		<property name="driverClassName" value=http://www.mamicode.com/"com.mysql.jdbc.Driver" />>
Spring+Mybatis J2SE小例总结