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);
+    }
 }