From e7d8f2ba42c899d369db9a2d6b3a243b3b28e3a2 Mon Sep 17 00:00:00 2001
From: Wonder <hezhaohui0807@163.com>
Date: Thu, 23 Oct 2025 14:49:37 +0800
Subject: [PATCH] =?UTF-8?q?=20=F0=9F=94=84Update:=20=E8=87=AA=E5=AE=9A?=
 =?UTF-8?q?=E4=B9=89SQL=E6=89=B9=E9=87=8F=E6=9B=B4=E6=96=B0=E5=8D=9A?=
 =?UTF-8?q?=E5=AE=A2=E7=82=B9=E8=B5=9E=E6=95=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/cn/hezhaohui/thumb/mapper/BlogMapper.java  |  5 ++++-
 src/main/resources/mapper/BlogMapper.xml            | 13 +++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/main/java/cn/hezhaohui/thumb/mapper/BlogMapper.java b/src/main/java/cn/hezhaohui/thumb/mapper/BlogMapper.java
index f64c41f..eed8a08 100644
--- a/src/main/java/cn/hezhaohui/thumb/mapper/BlogMapper.java
+++ b/src/main/java/cn/hezhaohui/thumb/mapper/BlogMapper.java
@@ -2,6 +2,9 @@ package cn.hezhaohui.thumb.mapper;
 
 import cn.hezhaohui.thumb.model.entity.Blog;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.Map;
 
 /**
 * @author 23117
@@ -10,7 +13,7 @@ import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 * @Entity cn.hezhaohui.thumb.model.entity.Blog
 */
 public interface BlogMapper extends BaseMapper<Blog> {
-
+    void batchUpdateThumbCount(@Param("countMap") Map<Long, Long> countMap);
 }
 
 
diff --git a/src/main/resources/mapper/BlogMapper.xml b/src/main/resources/mapper/BlogMapper.xml
index 50e0e5e..a536039 100644
--- a/src/main/resources/mapper/BlogMapper.xml
+++ b/src/main/resources/mapper/BlogMapper.xml
@@ -19,4 +19,17 @@
         id,userId,title,coverImg,content,thumbCount,
         createTime,updateTime
     </sql>
+    <update id="batchUpdateThumbCount">
+        UPDATE blog
+        SET thumbCount = thumbCount + CASE id
+        <foreach collection="countMap.entrySet()" item="value" index="key">
+            WHEN #{key} THEN #{value}
+        </foreach>
+        END
+        WHERE id IN
+        <foreach collection="countMap.keySet()" item="id" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+    </update>
+
 </mapper>