黑马MyBatis入门day1

package com.itheima.domain;

/*
CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(50) DEFAULT NULL,
  `password` varchar(50) DEFAULT NULL,
  `birthday` bigint(20) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
 */
public class User {
    private int id;
    private String username;
    private String password;
    private Long birthday;

    public User() {
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Long getBirthday() {
        return birthday;
    }

    public void setBirthday(Long birthday) {
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", birthday=" + birthday +
                '}';
    }
}

<?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="com.itheima.mapper.UserMapper">
    <!--查询全部-->
    <select id="findAll" resultType="User">
        select * from user
    </select>

    <!--根据id进行查询-->
    <select id="findById" resultType="User" parameterType="int">
        select * from user where id=#{id}
    </select>

    <!--增-->
    <insert id="add" parameterType="User">
        insert into user(username, password) values(#{username}, #{password})
    </insert>

    <!--删-->
    <delete id="delete" parameterType="java.lang.Integer">
        delete from user where id=#{id}
    </delete>

    <!--改-->
    <update id="update" parameterType="User">
        update user set username=#{username}, password=#{password} where id=#{id}
    </update>
</mapper>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <!--外部的配置文件-->
    <properties resource="jdbc.properties"></properties>

    <!--别名-->
    <typeAliases>
        <!--<typeAlias type="com.itheima.domain.User" alias="User"/>-->
        <package name="com.itheima.domain"/>
    </typeAliases>

    <!--配置数据源和事务管理-->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}" />
                <property name="url" value="${jdbc.url}" />
                <property name="username" value="${jdbc.username}" />
                <property name="password" value="${jdbc.password}" />
            </dataSource>
        </environment>

        <environment id="test">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3307/test" />
                <property name="username" value="root" />
                <property name="password" value="root" />
            </dataSource>
        </environment>
    </environments>

    <!--映射配置-->
    <mappers>
        <!--<mapper resource="com.itheima.mapper.UserMapper.xml"/>-->
        <mapper resource="com/itheima/mapper/UserMapper.xml"/>
    </mappers>

</configuration>

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3307/test
jdbc.username=root
jdbc.password=root

package com.itheima;

import com.itheima.domain.User;
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.Test;

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

public class CRUDTest {

    @Test
    public void findAll() throws IOException {
//        String config = "com/itheima/mapper/UserMapper.xml";
        String config = "SqlMapConfig.xml";
        InputStream resource = Resources.getResourceAsStream(config);
        //根据xml配置创建SqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resource);
        //创建SqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession();
        //执行语句
        List<User> userList = sqlSession.selectList("com.itheima.mapper.UserMapper.findAll");
        for (User user : userList) {
            System.out.println(user);
        }
    }

    @Test
    public void findById() throws IOException {
        //加载配置
        String mybatisConfig = "SqlMapConfig.xml";
        InputStream mybatisConfigStream = Resources.getResourceAsStream(mybatisConfig);
        //创建SqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(mybatisConfigStream);
        //创建SqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession();
        //语句
        User user = sqlSession.selectOne("com.itheima.mapper.UserMapper.findById", 1);
        System.out.println(user);
    }

    @Test
    public void add() throws IOException {
        //准备对象
        User user = new User();
        user.setUsername("liubei");
        user.setPassword("123");

//        String config = "com/itheima/mapper/UserMapper.xml";
        String config = "SqlMapConfig.xml";
        InputStream resource = Resources.getResourceAsStream(config);
        //根据xml配置创建SqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resource);
        //创建SqlSession
//        SqlSession sqlSession = sqlSessionFactory.openSession();
        SqlSession sqlSession = sqlSessionFactory.openSession(false);
        //执行语句
        int rows = sqlSession.insert("com.itheima.mapper.UserMapper.add", user);
        //提交事务
//        sqlSession.commit();
        System.out.println(rows);
    }

    @Test
    public void delete() throws IOException {
        String config = "SqlMapConfig.xml";
        InputStream resourceStream = Resources.getResourceAsStream(config);
        //创建SqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceStream);
        //创建SqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession();
        //删除
        int rows = sqlSession.delete("com.itheima.mapper.UserMapper.delete", 10);
        //提交事务
        sqlSession.commit();
        System.out.println(rows);
    }

    @Test
    public void update() throws IOException {
        //准备对象
        User user = new User();
        user.setId(1);
        user.setUsername("root1");
        user.setPassword("root");

        //加载核心配置
        String mybatisConfig = "SqlMapConfig.xml";
        InputStream mybatisConfigStream = Resources.getResourceAsStream(mybatisConfig);
        //创建SqlSessionFactory
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(mybatisConfigStream);
        //创建SqlSession
        SqlSession sqlSession = sqlSessionFactory.openSession();
        //语句
        int rows = sqlSession.update("com.itheima.mapper.UserMapper.update", user);
        //手动提交事务
        sqlSession.commit();
        System.out.println(rows);
    }
}