需要jar包：mybatis-3.x.x.jar 、假设需要和spring综合，此外，我们需要增加相关的包

1：看到项目文件夹 不要在意红色

2：依照步骤：

1：增加jar包

2：创建数据源（configuration.xml）创建数据库（此处省略）

<?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>

	<typeAliases>

		<!--给实体类起一个别名 user -->

		<typeAlias type="com.forum.po.User" alias="User" />

	</typeAliases>

	<!--数据源配置  这块用 BD2数据库 -->

	<environments default="development">

		<environment id="development">

			<transactionManager type="jdbc" />

			<dataSource type="POOLED">

				<property name="driver" value="com.ibm.db2.jcc.DB2Driver" />

				<property name="url" value="jdbc:db2://localhost:50000/forum" />

				<property name="username" value="DB2ADMIN" />

				<property name="password" value="admin" />

			</dataSource>

		</environment>

	</environments>

	<mappers>

		<!--userMapper.xml装载进来  同等于把“dao”的实现装载进来 -->

		<mapper resource="myBatis/userMapper.xml" />

	</mappers>

</configuration> 

3：创建实体类USER

package com.forum.po;

/**

 * 用户类

 *

 * @author db2admin

 *

 */

public class User extends Entity {

	private String name;

	private Integer age;

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public Integer getAge() {

		return age;

	}

	public void setAge(Integer age) {

		this.age = age;

	}

	public User() {

	}

}

4：创建dao接口、能够说是Mapper接口：UserMapper

package com.forum.dao;

import com.forum.po.User;

public interface UserMapper {

	public User findById(String Id);

}

5:创建dao的实现，不同于hibernarte的此处的实现为一个xml文件，也就是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">

	<!--这块等于dao接口的实现  namespace必须和接口的类路径一样-->

<mapper namespace="com.forum.dao.UserMapper">

	<!-- findById必须和接口中的方法名一样  返回一个User  就是刚才的别名  假设不弄别名要连类路径一起写 麻烦-->

	<select id="findById" parameterType="HashMap" resultType="User">

		select

		* from butone.student where id=#{id}

    </select>

</mapper>

6:測试类，MyBatisTest

package com.forum.test;

import java.io.IOException;

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.forum.dao.UserMapper;

import com.forum.po.User;

/**

 * myBatis数据库连接測试

 *

 * @author db2admin

 *

 */

public class MyBatisTest {

	/**

	 * 获得MyBatis SqlSessionFactory

	 * SqlSessionFactory负责创建SqlSession，一旦创建成功。就能够用SqlSession实例来运行映射语句。commit，rollback，close等方法。

	 * @return

	 */

	private static SqlSessionFactory getSessionFactory() {

		SqlSessionFactory sessionFactory = null;

		String resource = "configuration.xml";

		try {

			sessionFactory = new SqlSessionFactoryBuilder().build(Resources

					.getResourceAsReader(resource));

		} catch (IOException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		return sessionFactory;

	}

	public static void main(String[] args) {

		SqlSession sqlSession = getSessionFactory().openSession();

		UserMapper userMapper = sqlSession.getMapper(UserMapper.class);

		User user = userMapper.findById("1");

		System.out.println(user.getName());

	}

}