1.添加相应的jar包

2.创建持久化类

在src目录下创建一个名为com.mybatis.po的包

创建持久化类MyUser,包含三个属性（uid,uname,usex)

package com.mybatis.po;
/**
 *springtest数据库中user表的持久化类
 */
public class MyUser {
	private Integer uid;//主键
	private String uname;
	private String usex;
	public Integer getUid() {
		return uid;
	}
	public void setUid(Integer uid) {
		this.uid = uid;
	}
	public String getUname() {
		return uname;
	}
	public void setUname(String uname) {
		this.uname = uname;
	}
	public String getUsex() {
		return usex;
	}
	public void setUsex(String usex) {
		this.usex = usex;
	}
	@Override
	public String toString() {
		return "User [uid=" + uid +",uname=" + uname + ",usex=" + usex +"]";
	}
}

3.创建映射文件

在src目录下创建一个名为com.mybatis.mapper的包

创建映射文件UserMapper.xml

<?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="com.mybatis.mapper.UserMapper">
	<!-- 根据uid查询一个用户信息 -->
	<select id="selectUserById" parameterType="Integer" 
		resultType="com.mybatis.po.MyUser">
		select * from user where uid = #{uid}
	</select>
	<!-- 查询所有用户信息 -->
	<select id="selectAllUser"  resultType="com.mybatis.po.MyUser">
		select * from user
	</select>
	<!-- 添加一个用户 ，#{uname}为com.mybatis.po.MyUser的属性值-->
	<insert id="addUser" parameterType="com.mybatis.po.MyUser">
		insert into user (uname,usex) values(#{uname},#{usex})
	</insert>
	<!-- 修改一个用户 -->
	<update id="updateUser" parameterType="com.mybatis.po.MyUser">
		update user set uname = #{uname},usex = #{usex} where uid = #{uid}
	</update>
	<!-- 删除一个用户 -->
	<delete id="deleteUser" parameterType="Integer"> 
		delete from user where uid = #{uid}
	</delete>
</mapper>

4.创建Mybatis的配置文件

在src目录下创建Mybatis的核心配置文件（mybatis-config.xml)

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<!-- 配置环境 -->
	<environments default="development">
		<environment id="development">
			<!-- 使用JDBC的事务管理 -->
			<transactionManager type="JDBC"/>
			<dataSource type="POOLED">
				<!-- MySQL数据库驱动 -->
				<property name="driver" value="com.mysql.jdbc.Driver"/>
				<!-- 连接数据库的URL -->
				<property name="url" value="jdbc:mysql://localhost:3306/数据库名?characterEncoding=utf8"/>
				<property name="username" value=" 账号名 "/>
				<property name="password" value=" 密码 "/>
			</dataSource>
		</environment>
	</environments>
	<mappers>
	<!-- 映射文件的位置 -->
	<mapper resource="com/mybatis/mapper/UserMapper.xml"/>
	</mappers>
</configuration>

5.创建测试类

在src目录下创建一个名为com.mybatis.test的包，在该包中创建MyBatisTest测试类

package com.mybatis.test;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.mybatis.po.MyUser;
public class MyBatisTest {
	public static void main(String[] args) {
		try {
			//读取配置文件mybatis-config.xml
			InputStream config = Resources.getResourceAsStream("mybatis-config.xml");
			//根据配置文件构建SqlSessionFactory
			SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(config);
			//通过SqlSessionFactory创建SqlSession
			SqlSession ss = ssf.openSession();
			//SqlSession执行映射文件中定义的SQL，并返回映射结果
			//com.mybatis.mapper.UserMapper.selectUserById为UserMapper.xml中的命名空间+select的id
			//查询一个用户
			MyUser mu = ss.selectOne("com.mybatis.mapper.UserMapper.selectUserById", 1);
			System.out.println(mu);
			//添加一个用户
			MyUser addmu = new MyUser();
			addmu.setUname("张三");
			addmu.setUsex("男");
			ss.insert("com.mybatis.mapper.UserMapper.addUser",addmu);
			//修改一个用户
			MyUser updatemu = new MyUser();
			updatemu.setUid(1);
			updatemu.setUname("李四");
			updatemu.setUsex("女");
			ss.update("com.mybatis.mapper.UserMapper.updateUser", updatemu);
			//删除一个用户
			ss.delete("com.mybatis.mapper.UserMapper.deleteUser", 3);
			//查询所有用户
			List<MyUser> listMu = ss.selectList("com.mybatis.mapper.UserMapper.selectAllUser");
			for (MyUser myUser : listMu) {
				System.out.println(myUser);
			}
			//提交事务
			ss.commit();
			//关闭SqlSession
			ss.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

通过SqlSessionFactory对象创建SqlSwssion对象，并使用SqlSession对象的方法进行执行

数据库操作

调式：

在src目录下创建创建日志文件（log4j.properties)

作用：便于开发者查看控制台输出的SQL语句

代码如下：

# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
log4j.logger.com.mybatis=DEBUG
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

效果如下