mybatis Map的简单使用

//第一新建一个TeacherMapper接口
public interface TeacherMapper {
        //使用map修改
        int updateTeacherMap(Map<String,Object> map);
        //使用map插入
        int addTeacherMap(Map<String,Object> map);
}

//第二建立对象TeacherMapper对应的xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    //TeacherMapper对应的是上面接口的名字，通过这个名字 **xml** 于接口进行绑定
<mapper namespace="com.rzk.mapper.TeacherMapper">
    <!--map修改-->
    <update id="updateTeacherMap" parameterType="map">
       update mybatis.teacher set name=#{name} where id=#{id}
    </update>
    <!--map插入-->
    <insert id="addTeacherMap" parameterType="map">
        insert into mybatis.teacher(id, name) values (#{tid},#{tname})
    </insert>
</mapper>

//第三建pojo
public class Teacher {
    private int id;
    private String name;
    public Teacher() {
    }
    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 Teacher(int id, String name) {
        this.id = id;
        this.name = name;
    }
    @Override
    public String toString() {
        return "Teacher{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }
}

 

//第四mybatis建工具类
public class MybatisUtils {
    private static SqlSessionFactory sqlSessionFactory;
    static{
        try {
            String resources="mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resources);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    public static SqlSession getSqlSessionFactory() {
        return sqlSessionFactory.openSession();
    }
}

 

//编写config.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">
<!--configguration核心配置文件-->
<configuration>
    <!--导入外部配置文件-->
    <properties resource="db.properties"/>
    <!--标准日志工厂实现-->
    <!--   <settings>
           <setting name="logImpl" value="STDOUT_LOGGING"/>
       </settings>-->
    <settings>
        <setting name="logImpl" value="LOG4J"/>
    </settings>
    <!--给实体类起别名-->
    <typeAliases>
        <package name="com.rzk.pojo" />
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
<!--        <mapper resource="com/rzk/dao/StudentMapper.xml"/>-->
        <mapper resource="com/rzk/mapper/TeacherMapper.xml"/>
<!--        <mapper class="com.rzk.mapper.Teacher"/>-->
        <mapper class="com.rzk.mapper.StudentMapper"/>
    </mappers>
</configuration>

 

测试类
  /*map修改*/
    @Test
    public void updateTeacherMap(){
        SqlSession sqlSession = MybatisUtils.getSqlSessionFactory();
      //通过反射获取接口里面的东西
        TeacherMapper mapper = sqlSession.getMapper(TeacherMapper.class);
        Map<String, Object> map = new HashMap<>();
        map.put("id",1);
        map.put("name","精致的猪猪女孩");
        //增删改查都要进行提交
        int i = mapper.updateTeacherMap(map);
        if (i>0){
            System.out.println("修改成功");
            sqlSession.commit();
        }
        sqlSession.close();
    }
  /*map的插入*/
    @Test
    public void addTeacher1(){
        SqlSession sqlSession = MybatisUtils.getSqlSessionFactory();
        TeacherMapper mapper = sqlSession.getMapper(TeacherMapper.class);
        Map<String, Object> map = new HashMap<String,Object>();
        map.put("tid",3);
        map.put("tname","李大强");
        mapper.addTeacherMap(map);
        sqlSession.commit();
        sqlSession.close();
    }

底层使用的还是jdbc的东西