Use of mybatis resultMap

resultMap 

result set mapping 


id name pwd field of the database 
id name password entity class 


XML
 <-! result set mapping -> 
    <resultMap ID = " userMap " type = " the User " > 
        <-! column fields in a database, property entity class attributes -> 
        <Result column = " ID " property = " ID " /> 
        <Result column = " name " property = " name " /> 
        the above two paragraphs can not write only inconsistent database entity classes and field can be a
         <= Result column "pwd" property="password"/>
    </resultMap>
    <select id="getUserById" resultMap="UserMap" parameterType="int">
       /*定义sql*/
       select * from mybatis.user where id = #{id};
   </select>