mybatis增删改

package com.rzk.dao;

import com.rzk.pojo.User;

import java.util.List;
import java.util.Map;

public interface UserMapper {

    //模糊查詢
    List getUserLike(String value);
    //查询全部用户
    List getUserList();
    //根据ID查询用户
    User getUserById(int id);
    //插入一个用户
    int addUser(User user);
    //修改用户
    int updateUser(User user);
    //删除一个用户
    int deleteUser(int id);
    //插入的Map--------有帮助------------
    int addUser1(Map map);
    //查询的Map
    User getUserId1(Map map);

}

-------
对应的Mapper.xml
"1.0" encoding="UTF-8" ?>
DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

namespace="com.rzk.dao.UserMapper">
    
    <select id="getUserLike" resultType="com.rzk.pojo.User">
  睿共享      select * from mybatis.user where name like "%"#{value}"%";
    select>
    
   <select id="getUserList" resultType="com.rzk.pojo.User">
       select * from mybatis.user
   select>
    
    <select id="getUserById" parameterType="int" resultType="com.rzk.pojo.User">
        select * from mybatis.user where id = #{id}
    select>
    
    "addU睿共享ser" parameterType="com.rzk.pojo.User" >
        insert into mybatis.user (id, name, pwd) values (#{id},#{name},#{pwd})
    
    
    "updateUser" parameterType="com.rzk.pojo.User">
        update mybatis.user set name=#{name},pwd=#{pwd} where id=#{id};
    
    
    "deleteUser" parameterType="int">
        delete from mybatis.user where id = #{id}
    


    
    "ad睿共享dUser1" parameterType="map">
        insert into mybatis.user(id, name, pwd) values(#{userid},#{username},#{userpassword});
    
    
    <select id="getUserId1" parameterType="map" resultType="com.rzk.pojo.User">
        select * from mybatis.user where id = #{id} and pwd =#{password};
    select>



-----------------------------
实体类
package com.rzk.pojo;

public class User {
    private int id;
    private String name;
    private String pwd;
    public User(){

    }
    public User(int id,String name,String pwd){
        this.id=id;
        this.name=name;
        this.pwd=pwd;
    }
    public int getId(){
        return id;
    }
    public void setId(int id){
        this.id=id;
    }
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name=name;
    }
    public String getPwd(){
        return pwd;
    }
    public void setPwd(String pwd){
        this.pwd=pwd;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + ''' +
                ", pwd='" + pwd + ''' +
                '}';
    }
}
-
------------------------------
package com.rzk.util;

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 java.io.IOException;
import java.io.InputStream;
public class MybatisUtils {
    private static SqlSessionFactory sqlSessionFactory;
    static{
        try {
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory =  new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static SqlSession getSqlSession(){
        return sqlSessionFactory.openSession();

    }
}

--------------------------------

测试类
package com.rzk.dao;

import com.rzk.pojo.User;
import com.rzk.util.MybatisUtils;
import com.sun.corba.se.spi.ior.ObjectKey;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.junit.Test;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class UserDaoTest {
    @Test
    public void getUserLike(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMappe睿共享r mapper = sqlSession.getMapper(UserMapper.class);
        List userList = mapper.getUserLike("李");
        for (User user : userList){
            System.out.println(user);
        }
        sqlSession.close();
    }

    @Test
    public void test(){
        睿共享//获得sqlSession对象
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        //方式一：getMapper
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        List userList = mapper.getUserList();
        for (User user : userList) {
            System.out.println(user);
        }

        sqlSession.close();
    }

    @Test
    public void getUserById(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        User userById = mapper.getUserById(1);
        System.out.println(userById);

        sqlSession.close();
    }

    @Test
    public void addUser(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        int i = mapper.addUser(new User(4,"赵柳","1234556"));
        sqlSession.commit();
        System.out.println("插入成功");

        sqlSession.close();
    }

    @Test
    public void updateUser(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        int user = mapper.updateUser(new User(1, "李倩", "123123"));
        if (user>0){
            System.out.println("修改成功");
        }
        sqlSession.commit();
        sqlSession.close();
    }

    @Test
    public void deleteUser(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        int i = mapper.deleteUser(5);
        if (i>0){
            System.out.println("删除成功");
        }else{
            System.out.println("删除失败");
        }
        sqlSession.commit();

        sqlSession.close();
    }

    @Test
    public void getUserId1(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        Map map = new HashMap();
        map.put("id",1);
        map.put("password","123123");

        User user = mapper.getUserId1(map);
        System.out.println(user);
        sqlSession.close();
    }
}
------------------------------------

        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">