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 +
                 '}';
     }
 }

User

 <?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>

UserMapper.xml

 <?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>

SqlMapConfig

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

jdbc.properties

 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);
     }
 }

CRUDTest