mybatis学习之二 增删改查

<?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="mapper.GrilsMapper">

    <select id="getGril" parameterType="int" resultType="domain.Grils">
        select * from grils where id=#{id}
    </select>
    
    <resultMap type="domain.Grils" id="grilsMap">
        <id column="id" property="id"/>
        <result column="name" property="name"/>
        <result column="nationality" property="nationality"/>
    </resultMap>
    <select id="getGrils" resultMap="grilsMap">
        select * from grils
    </select>
    
    <insert id="addGril" parameterType="domain.Grils">
        insert into grils values (#{id},#{name},#{nationality})
    </insert>
    
    <update id="updateGril" parameterType="domain.Grils">
        update grils set name=#{name},nationality=#{nationality} where id=#{id}
    </update>
    
    <delete id="deleteGril" parameterType="int">
        delete from grils where id=#{id}
    </delete>
</mapper>

package test;

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

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import domain.Grils;
import mapper.GrilsMapper;

public class GrilsTest2 {
    private static SqlSession sqlSession;
    private static GrilsMapper grilsMapper;
    
    static {
        String resource = "conf.xml";
        InputStream in = GrilsTest.class.getClassLoader().getResourceAsStream(resource);
        //创建SqlSessionFactory
        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(in);
        sqlSession = sessionFactory.openSession();
        grilsMapper = sqlSession.getMapper(GrilsMapper.class);
    }

    public static void main(String[] args) {
        GrilsTest2 grilsTest2 = new GrilsTest2();
        grilsTest2.getGril();
        grilsTest2.addGril();
        grilsTest2.getGrils();
        grilsTest2.updateGril();
        grilsTest2.getGrils();
        grilsTest2.deleteGril();
        grilsTest2.getGrils();
        
    }
    
    //查询一条
    public void getGril() {
        Grils gril = grilsMapper.getGril(1);
        System.out.println("查询一条记录:"+gril);
    }
    
    //添加一条
    public void addGril() {
        Grils gril = new Grils();
        gril.setId(2);
        gril.setName("章子怡");
        gril.setNationality("中国"); 
        grilsMapper.addGril(gril);
        sqlSession.commit();
        System.out.println("增加一条记录:"+gril);
    }
    
    //查询全部
    public void getGrils() {
        List<Grils> grils = grilsMapper.getGrils();    
        System.out.println("查询全部:"+grils);
    }
    
    //更新某条记录
    public void updateGril() {
        Grils gril = new Grils();
        gril.setId(1);
        gril.setName("苍老师");
        gril.setNationality("日本"); 
        grilsMapper.updateGril(gril);
        sqlSession.commit();
        System.out.println("更新了一条记录:"+gril);
    }
    
    //删除
    public void deleteGril() {
        grilsMapper.deleteGril(2);
        System.out.println("删除了一条记录");
        sqlSession.commit();
    }
}