1.看一下我們接口

package cn.bdqn.mybatis.dao;

import org.apache.ibatis.annotations.Select;

import cn.bdqn.mybatis.been.Emp;
/**
 * 這個接口不用寫實現類,是用來給empMapper.xml進行動態綁定的
 * @author Administrator
 *
 */
public interface EmpMapper {
	
	public Emp getEmpById(Integer id);
	public void addEmp(Emp emp);
	/**
	 * MyBatis允許增刪改直接定義一下類型返回值
	 * int long boolean 以及相應的包裝類,
	 * 在接口中定義方法的時候,直接定義相應的返回值即可,無其他操作
	 * @param emp
	 * @return
	 */
	public boolean updateEmp(Emp emp);
	public void deleteEmpById(Integer id);
}

2.編寫mapper

<?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">
<!--namespace:名稱空間 -->
<mapper namespace="cn.bdqn.mybatis.dao.EmpMapper">
	<!-- id,唯一標識 resultType:返回值類型,bean的全限定名稱 #{id},從傳遞過來的參數中取出id值,相當於換位符 public 
		Emp getEmpById(Integer id); -->
	<select id="getEmpById" resultType="cn.bdqn.mybatis.been.Emp"
		databaseId="mysql">
		select * from emp where id = #{id}
	</select>
 

	<select id="getEmpById" resultType="cn.bdqn.mybatis.been.Emp"
		databaseId="oracle">
		select * from emp where id = #{id}
	</select>
	<!-- public void addEmp(Emp emp); insert標簽: id:對應我們javaBean的方法名 parameterType 
		可以省略,如果要寫就是javaBean的全限定名稱 insert into emp(last_name,gender,email) values(#{last_name},#{gender},#{email}) 
		結尾不需要分號,values值的#{對應的javaBean的屬性名} -->
	<insert id="addEmp" parameterType="cn.bdqn.mybatis.been.Emp">
		insert into emp(last_name,email,gender)
		values(#{last_name},#{email},#{gender})
	</insert>
 

	<!-- update標簽: public void updateEmp(Emp emp); id:對應我們javaBean的方法名 parameterType 
		可以省略,如果要寫就是javaBean的全限定名稱 update emp set last_name=#{last_name},email=#{email},gender=#{gender} 
		while id=#{id} 結尾不需要分號,#{}相當於占位符,等於我們傳過來的值 -->
	<update id="updateEmp">
		update emp set last_name=#{last_name},email=#{email},gender=#{gender}	where
		id=#{id}
	</update>
	<!-- delet標簽: public void deleteEmpById(Integer id); -->
	<delete id="deleteEmpById">
		delete from emp where id=#{id}
	</delete>

</mapper>

　　3.編寫測試類

package cn.bdqn.mybatis.test;

import java.io.IOException;
import java.io.InputStream;

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 cn.bdqn.mybatis.been.Emp;
import cn.bdqn.mybatis.dao.EmpMapper;

public class MyBatisTest_02 {
	public static void main(String[] args) throws IOException {
		//獲取SqlSessionFactory實例
		String resource="mybatis-config.xml";
		InputStream is = Resources.getResourceAsStream(resource);
		 SqlSessionFactory build = new SqlSessionFactoryBuilder().build(is);
		 //獲取到的sqlsession不會自動提交
		 SqlSession openSession = build.openSession();
		 try{
			 //測試添加
			 EmpMapper mapper = openSession.getMapper(EmpMapper.class);
		 /*	 Emp emp = new Emp(null,"liyuanfeng","[email protected]","1");
			 mapper.addEmp(emp);*/
			 //測試修改
			 Emp emp = new Emp(1,"liyuanfeng","[email protected]","1");
			 mapper.updateEmp(emp);
			 
			 
			 //進行手動提交
			 openSession.commit();
		 }finally{
			 openSession.close(); 
		 }
		
	}

}

MyBatis編寫映射文件實現增刪改操作 附說明即源碼