MyBatis crud操作

Posted 2020-07-02 纸上得来终觉浅，绝知此事要躬行

Test2.java

package com.mycom.mybatis_1.crud;

import java.util.List;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.junit.Test;

import com.mycom.mybatis_1.bean.User;
import com.mycom.mybatis_1.util.MyBatisUtils;

public class Test2 {
    
    @Test
    public void testAdd(){
        SqlSessionFactory factory = MyBatisUtils.getFactory();
        //默认是手动提交的
        SqlSession session = factory.openSession();
        
        String statement = "com.mycom.mybatis_1.bean.userMapper.addUser";
        int ins = session.insert(statement, new User(-1,"KK",23, "男"));
        //提交
        session.commit();
        session.close();
        
        System.out.println(ins);
    }
    
    @Test
    public void testUpd(){
        SqlSessionFactory factory = MyBatisUtils.getFactory();
        //默认是手动提交的
//        SqlSession session = factory.openSession();
//        
//        String statement = "com.mycom.mybatis_1.bean.userMapper.updUser";
//        int ins = session.update(statement, new User(4,"KK444",27));
//        //提交
//        session.commit();
        
        //默认是自动提交的
        SqlSession session = factory.openSession(true);
        
        String statement = "com.mycom.mybatis_1.bean.userMapper.updUser";
        int upd = session.update(statement, new User(4,"KK444",28, "男"));
        session.close();
        System.out.println(upd);
    }
    
    @Test
    public void testDel(){
        SqlSessionFactory factory = MyBatisUtils.getFactory();
        //默认是自动提交的
        SqlSession session = factory.openSession(true);
        
        String statement = "com.mycom.mybatis_1.bean.userMapper.delUser";
        int del = session.delete(statement, 4);
        session.close();
        System.out.println(del);
    }
    
    @Test
    public void testgetUser(){
        SqlSessionFactory factory = MyBatisUtils.getFactory();
        //默认是自动提交的
        SqlSession session = factory.openSession(true);
        
        String statement = "com.mycom.mybatis_1.bean.userMapper.getUser";
        User user = session.selectOne(statement, 1);
        session.close();
        System.out.println(user);
    }
    
    @Test
    public void testgetAll(){
        SqlSessionFactory factory = MyBatisUtils.getFactory();
        //默认是自动提交的
        SqlSession session = factory.openSession(true);
        
        String statement = "com.mycom.mybatis_1.bean.userMapper.getAllUsers";
        List<User> list = session.selectList(statement);
        session.close();
        System.out.println(list);
    }

}

MyBatisUtils.java

package com.mycom.mybatis_1.util;

import java.io.InputStream;

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

import com.mycom.mybatis_1.select.Test1;

public class MyBatisUtils {
    
    public static SqlSessionFactory getFactory(){
        String resource = "conf.xml";
        InputStream is = Test1.class.getClassLoader().getResourceAsStream(resource);
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
        return factory;
    }

}