点赞+取消点赞

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

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.bao.dating.mapper.PostLikeMapper">
+
+    <select id="findByPostAndUser" resultType="com.bao.dating.pojo.entity.PostLike">
+        select * from dating.post_like where user_id = #{userId} and post_id = #{postId}
+    </select>
+
+    <insert id="insert" useGeneratedKeys="true" keyProperty="likeId">
+        INSERT INTO dating.post_like (post_id, user_id,created_at) VALUES (#{postId}, #{userId},NOW())
+    </insert>
+
+    <delete id="deleteByPostIdAndUserId">
+        delete from dating.post_like where post_id = #{postId} and user_id = #{userId}
+    </delete>
+</mapper>

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

@@ -26,6 +26,18 @@
         </if>
          #{isPublic}, 0, 0, #{createdAt}, #{updatedAt})
     </insert>
+    <!--增加点赞数量-->
+    <update id="increaseLikeCount">
+        update dating.post set like_count = like_count + 1 where post.post_id = #{postId}
+    </update>
+    <update id="decreaseLikeCount">
+        update dating.post set like_count= like_count - 1 where post.post_id = #{postId}
+    </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>
 
     <delete id="deletePostById" parameterType="int">
         DELETE FROM post WHERE post_id = #{postId}