完成收藏模块

src/main/java/com/bao/dating/mapper/PostMapper.java

@@ -2,6 +2,7 @@ package com.bao.dating.mapper;
 
 import com.bao.dating.pojo.entity.Post;
 import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
 
 @Mapper
 public interface PostMapper {
@@ -44,4 +45,34 @@ public interface PostMapper {
      * @return 影响行数
      */
     int decreaseLikeCount(Long postId);
+
+    /**
+     * 查询当前动态属于哪个用户id
+     * @param postId 动态id
+     * @return 用户id
+     */
+    Long selectUserIdByPostId(@Param("post_id") Long postId);
+
+    /**
+     * 查询点赞数
+     *
+     * @param postId
+     * @return
+     */
+    int selectFavoriteCount(Long postId);
+
+    /**
+     * 收藏数+1
+     *
+     * @param postId 动态ID
+     * @return 影响行数
+     */
+    int increaseFavoriteCount(Long postId);
+    /**
+     * 收藏数-1
+     *
+     * @param postId 动态ID
+     * @return 影响行数
+     */
+    int decreaseFavoriteCount(Long postId);
 }

src/main/java/com/bao/dating/service/PostService.java

@@ -27,4 +27,11 @@ public interface PostService {
      * @return 删除的动态对象
      */
     void deletePostById(Integer postId);
+
+    /**
+     * 查询
+     * @param postId 动态id
+     * @return 用户id
+     */
+    Long selectUserIdByPostId(Long postId);
 }

src/main/java/com/bao/dating/service/impl/PostServiceImpl.java

@@ -147,4 +147,15 @@ public class PostServiceImpl implements PostService {
     public void deletePostById(Integer postId) {
         postMapper.deletePostById(postId);
     }
+
+    /**
+     * 查询用户id
+     * @param postId 动态id
+     * @return
+     */
+
+    @Override
+    public Long selectUserIdByPostId(Long postId) {
+        return postMapper.selectUserIdByPostId(postId);
+    }
 }

src/main/resources/com/bao/dating/mapper/PostMapper.xml

@@ -42,10 +42,26 @@
     <update id="decreaseLikeCount">
         update dating.post set like_count= like_count - 1 where post.post_id = #{postId}
     </update>
+    <!--增加收藏数量-->
+    <update id="increaseFavoriteCount">
+        update post set favorite_count = favorite_count + 1 where post_id = #{post_id}
+    </update>
+    <!--减少收藏数量-->
+    <update id="decreaseFavoriteCount">
+        update post set favorite_count = favorite_count - 1 where post_id = #{post_id}
+    </update>
 
     <!--查询点赞当前数量-->
     <select id="selectLikeCount" resultType="java.lang.Integer">
         select dating.post.like_count from dating.post where post.post_id = #{postId}
     </select>
+    <!--查询当前动态的用户id-->
+    <select id="selectUserIdByPostId" resultType="java.lang.Long">
+        SELECT user_id FROM post WHERE post_id = #{post_id}
+    </select>
+    <!--查询当前收藏数量-->
+    <select id="selectFavoriteCount" resultType="java.lang.Integer">
+        select dating.post.favorite_count from dating.post where post.post_id = #{postId}
+    </select>
 
 </mapper>