上接入门案例（看之前的《mybatis基本介绍及入门案例》篇）

1、映射接口

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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;@Beforepublic void init() throws Exception{
//        得到myBatis-config.xml,转换成一个inputStreamInputStream 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);}@Testpublic 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);}}@Testpublic void testDel() {monsterMapper.delMonster(1);}@Testpublic 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);}@Testpublic void testFindById(){Monster monster = new Monster();monster = monsterMapper.findById(11);System.out.println(monster);}@Testpublic void testFindAllMonster () {List<Monster> allMonster = monsterMapper.findAllMonster();for (Monster monster: allMonster){System.out.println(monster);}}@Afterpublic void destory() throws Exception{if (session != null) {session.commit();session.close();}}
}