数据层框架应用--Mybatis（二） 基于注解实现数据的CRUD

<!--        数据库  start-->
        <!--        引入jdbc与mysql依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>
        <!--        mybatis-->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.6</version>
        </dependency>
        <!--        数据库 end-->

/**
 * @Author: LOMTOM
 * @Date: 2020/4/20
 * @Time: 15:12
 * @Email: lomtom@qq.com
 */
@Data
public class UserInfo {

    private Integer id;

    private String userName;

    private String passWord;

    private Date regDate;

}

请根据自己mysql版本，确认之后再食用

1、mysql for version 8
jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/javaweb2?characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

2、mysql for version 5
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/javaweb2?characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

<configuration>
    <!--加载属性文件-->
    <properties resource="jdbc.properties"></properties>

    <!--给包中的类注册别名,注册后可以直接使用类名,而不用使用全限定的类名就是不用包含包名)。-->
    <typeAliases>
        <package name="com.lomtom.mybatis.entity"/>
    </typeAliases>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driverClassName}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper class="com.lomtom.mybatis.mapper.UserInfoMapperAnnotation"></mapper>
    </mappers>
</configuration>

/**
 * @Author: LOMTOM
 * @Date: 2020/4/26
 * @Time: 16:16
 * @Email: lomtom@qq.com
 */
public interface UserInfoMapperAnnotation {

    /**
     * 插入
     * @param userInfo
     * @return
     */
    @Insert(" insert into user_info(userName, passWord, regDate)\n" +
            "        values(#{userName},#{passWord}, #{regDate})")
    int addUserInfo(UserInfo userInfo);

    /**
     * 删除
     * @param id
     * @return
     */
    @Delete("delete from user_info where id = #{id}")
    int deleteUserInfo(Integer id);

    /**
     * 获取
     * @param id
     * @return
     */
    @Select("select * from user_info where id = #{id}")
    UserInfo getUserInfoById(Integer id);

    /**
     * 获取全部
     * @return
     */
    @Select("select * from user_info")
    List<UserInfo> getALLUserInfo();

    /**
     * 更新
     * @param userInfo
     * @return
     */
    @Update("update user_info set userName = #{userName}, passWord = #{passWord}, regDate = #{regDate} where id = #{id}")
    void updateUserInfo(UserInfo userInfo);
}

/**
 * @Author: LOMTOM
 * @Date: 2020/4/20
 * @Time: 15:49
 * @Email: lomtom@qq.com
 */
public class MybatisUtils {
    private static SqlSessionFactory sqlSessionFactory = null;
    static {
        try {
            Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
            sqlSessionFactory =  new SqlSessionFactoryBuilder().build(reader);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static SqlSession getSession() {
        return sqlSessionFactory.openSession();
    }
}

<!--        测试-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

/**
 * @Author: LOMTOM
 * @Date: 2020/4/20
 * @Time: 15:44
 * @Email: lomtom@qq.com
 */



public class MybatisTest {


    @Test
    public void testAddUserInfoAnnotation(){
        SqlSession sqlSession= MybatisUtils.getSession();
        UserInfoMapperAnnotation userInfoMapper = sqlSession.getMapper(UserInfoMapperAnnotation. class);
        UserInfo userInfo= new UserInfo();
        userInfo.setUserName("qq小冰");
        userInfo.setPassWord("123");
        userInfo.setRegDate(new Date());
        int i= userInfoMapper.addUserInfo(userInfo);
        System. out. println (i+ " record has inserted !");
        sqlSession.commit();
        sqlSession.close();
    }


    @Test
    public void testGetUserInfoByIdAnnotation(){
        SqlSession sqlSession= MybatisUtils.getSession();
        UserInfoMapperAnnotation userInfoMapper = sqlSession.getMapper(UserInfoMapperAnnotation. class);
        System.out.println(userInfoMapper.getUserInfoById(1));
        System. out. println ("record has got !");
        sqlSession.commit();
        sqlSession.close();
    }

    @Test
    public void testGetAllUserInfoAnnotation(){
        SqlSession sqlSession= MybatisUtils.getSession();
        UserInfoMapperAnnotation userInfoMapper = sqlSession.getMapper(UserInfoMapperAnnotation. class);
        System.out.println(userInfoMapper.getALLUserInfo());
        System. out. println ("record has got !");
        sqlSession.commit();
        sqlSession.close();
    }

    @Test
    public void testUpdateUserInfoAnnotation(){
        SqlSession sqlSession= MybatisUtils.getSession();
        UserInfoMapperAnnotation userInfoMapper = sqlSession.getMapper(UserInfoMapperAnnotation. class);
        UserInfo userInfo= new UserInfo();
        userInfo.setId(1);
        userInfo.setUserName("qq大冰");
        userInfo.setPassWord("123456");
        userInfo.setRegDate(new Date());
        try {
            userInfoMapper.updateUserInfo(userInfo);
            System. out. println ("record has updated !");
        }catch (Exception e){
            e.printStackTrace();
        }
        sqlSession.commit();
        sqlSession.close();
    }

    @Test
    public void testDeleteUserInfoAnnotation(){
        SqlSession sqlSession= MybatisUtils.getSession();
        UserInfoMapperAnnotation userInfoMapper = sqlSession.getMapper(UserInfoMapperAnnotation. class);
        int i= userInfoMapper.deleteUserInfo(1);
        System. out. println (i+ " record has deleted !");
        sqlSession.commit();
        sqlSession.close();
    }

MySQLNonTransientConnectionException: Client does not support authentication protocol requested by server; consider upgrading MySQL client