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1、映射接口

public interface MonsterMapper {
    //添加方法

    public void addMonster(Monster monster);
    public void delMonster(Integer monster_id);
    public  void updateMonster(Monster monster);
    public Monster findById(Integer monster_id);
    public List<Monster> findAllMonster();
}

2、映射文件

<mapper namespace="com.bin.mybatis.mapper.MonsterMapper">
    <insert id="addMonster" parameterType="com.bin.mybatis.entity.Monster">
        INSERT INTO mybatis_monster_ (monster_id,age,birthday,email,gender,name,salary)
        VALUES (#{monster_id},#{age},#{birthday},#{email},#{gender},#{name},#{salary})
    </insert>
    <delete id="delMonster" parameterType="Integer">
        DELETE FROM mybatis_monster_ WHERE monster_id=#{monster_id}
    </delete>
    <update id="updateMonster" parameterType="com.bin.mybatis.entity.Monster">
        UPDATE mybatis_monster_ SET age=#{age},birthday=#{birthday},email=#{email},gender=#{gender},name=#{name},salary=#{salary}
        WHERE monster_id=#{monster_id}
    </update>
    <select id="findById" parameterType="Integer" resultType="com.bin.mybatis.entity.Monster">
        SELECT * FROM mybatis_monster_ WHERE monster_id=#{monster_id}
    </select>
    <select id="findAllMonster" resultType="com.bin.mybatis.entity.Monster">
        SELECT * FROM mybatis_monster_
    </select>
</mapper>

3、JUNIT测试


import com.bin.mybatis.entity.Monster;
import com.bin.mybatis.mapper.MonsterMapper;
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 org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.InputStream;
import java.util.Date;
import java.util.List;

public class testMybatis {
    private SqlSessionFactory sqlSessionFactory;
    private SqlSession session;
    private MonsterMapper monsterMapper;
    @Before
    public void init() throws Exception{
//        得到myBatis-config.xml,转换成一个inputStream
        InputStream inputStream = Resources.getResourceAsStream("myBatis-config.xml");
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

        //通过sqlSessionFactory对象获取一个回话
        session = sqlSessionFactory.openSession();
        //通过session获取到 monsterMapper这个接口对象
       monsterMapper = session.getMapper(MonsterMapper.class);

    }
    @Test
    public void testAdd() {
        Monster monster = new Monster();
        for(int i=0;i<10;i++) {
            monster.setAge(100+i);
            monster.setBirthday(new Date());
            monster.setEmail("123@qq.com");
            monster.setGender(1);
            monster.setSalary(8928.00);
            monster.setName("银角"+i);

            monsterMapper.addMonster(monster);
        }

    }
    @Test
    public void testDel() {
        monsterMapper.delMonster(1);
    }
    @Test
    public void testUpdate() {
        Monster monster = new Monster();
        monster.setMonster_id(2);
        monster.setAge(200);
        monster.setBirthday(new Date());
        monster.setEmail("123@qq.com");
        monster.setGender(1);
        monster.setSalary(8928.00);
        monster.setName("牛魔怪");
        monsterMapper.updateMonster(monster);
    }
    @Test
    public void testFindById(){
        Monster monster = new Monster();
        monster = monsterMapper.findById(11);
        System.out.println(monster);
    }
    @Test
    public void testFindAllMonster () {
        List<Monster> allMonster = monsterMapper.findAllMonster();
        for (Monster monster: allMonster){
            System.out.println(monster);
        }
    }
    @After
    public void destory() throws Exception{
        if (session != null) {
            session.commit();
            session.close();
        }
    }
}

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