public class AppPost {private String postId;private String postTitle;private int upTime;private int postType;private int pointsNum;private int collectionNum;private int replyNum;private int transferNum;private int isHost;private int contentType;private AppUserMini user;
}public class AppUserMini {private String userId;private String userName;private Integer userSex;private Integer userAge;private String userImg;private String userAddress;
}

<resultMap id="Base_app_post" type="<路径省略>.AppPost"><result column="post_id" property="postId"/><result column="post_title" property="postTitle"/><result column="up_time" property="upTime"/><result column="post_type" property="postType"/><result column="points_num" property="pointsNum"/><result column="collection_num" property="collectionNum"/><result column="reply_num" property="replyNum"/><result column="transfer_num" property="transferNum"/><result column="is_host" property="isHost"/><result column="content_type" property="contentType"/><association property="user" javaType="<路径省略>.AppUserMini" resultMap="Base_app_user" /></resultMap><resultMap id="Base_app_user" type="<路径省略>.AppUserMini" ><result column="user_id" property="userId"/><result column="user_name" property="userName"/><result column="user_sex" property="userSex"/><result column="user_age" property="userAge"/><result column="user_img" property="userImg"/><result column="user_address" property="userAddress"/></resultMap><select id="selectAppByPostId" resultMap="Base_app_post" parameterType="java.lang.String" >select a.post_id,a.post_title,a.up_time,a.post_type,a.points_num,a.collection_num,a.reply_num,a.transfer_num,a.is_hot,a.content_type,b.user_id,b.user_name,b.user_sex,b.user_age,b.user_img,b.user_addressfrom service_post a,sys_user bwhere a.post_id = #{postId,jdbcType=INTEGER} AND a.user_id=b.user_id</select>