From 81b4851e42d45bb4cc8917043b262196d90c314e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A6=BE=E5=87=A0=E6=B5=B7?= <zh56462271@qq.com>
Date: Tue, 16 Mar 2021 15:38:49 +0800
Subject: [PATCH] =?UTF-8?q?refactor:=20=E5=88=86=E9=A1=B5=E6=9F=A5?=
 =?UTF-8?q?=E8=AF=A2?=
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通过数据库进行分页查询而非查询全部然后分页
---
 .../serviceimpl/ArticleServiceImpl.java       |  7 ++--
 src/main/resources/mapper/articleMapper.xml   | 33 +++++++++++++++++--
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/src/main/java/cn/celess/blog/service/serviceimpl/ArticleServiceImpl.java b/src/main/java/cn/celess/blog/service/serviceimpl/ArticleServiceImpl.java
index 79d1f30..247c971 100644
--- a/src/main/java/cn/celess/blog/service/serviceimpl/ArticleServiceImpl.java
+++ b/src/main/java/cn/celess/blog/service/serviceimpl/ArticleServiceImpl.java
@@ -279,21 +279,20 @@ public class ArticleServiceImpl implements ArticleService {
      */
     @Override
     public PageData<ArticleModel> adminArticles(int count, int page, Boolean deleted) {
+        PageHelper.startPage(page, count);
         List<Article> articleList = articleMapper.findAll();
 
-        PageData<ArticleModel> pageData = new PageData<>(null, 0, count, page);
+        PageData<ArticleModel> pageData = new PageData<>(new PageInfo<>(articleList));
+
         List<Article> collect;
         if (deleted != null) {
             collect = articleList.stream().filter(article -> article.isDeleted() == deleted).collect(Collectors.toList());
         } else {
             collect = articleList;
         }
-        pageData.setTotal(collect.size());
         List<ArticleModel> articleModels = collect.stream()
                 .peek(article -> article.setMdContent(null))
                 .map(ModalTrans::article)
-                .skip((page - 1) * count)
-                .limit(count)
                 .collect(Collectors.toList());
         pageData.setList(articleModels);
 
diff --git a/src/main/resources/mapper/articleMapper.xml b/src/main/resources/mapper/articleMapper.xml
index dae7726..3454c75 100644
--- a/src/main/resources/mapper/articleMapper.xml
+++ b/src/main/resources/mapper/articleMapper.xml
@@ -181,9 +181,36 @@
 
 
     <select id="findAll" resultMap="articleViewResultMap">
-        select *
-        from articleView
-        order by articleId desc
+        select article.a_id             as articleId,
+               article.a_title          as title,
+               article.a_summary        as summary,
+               article.a_md_content     as mdContent,
+               article.a_url            as url,
+               article.a_is_original    as isOriginal,
+               article.a_reading_number as readingCount,
+               article.a_like           as likeCount,
+               article.a_dislike        as dislikeCount,
+               article.a_publish_date   as publishDate,
+               article.a_update_date    as updateDate,
+               article.a_is_open        as isOpen,
+               category.t_id            as categoryId,
+               category.t_name          as categoryName,
+               user.u_id                as authorId,
+               user.u_email             as userEmail,
+               user.u_avatar            as userAvatar,
+               user.u_display_name      as userDisplayName,
+               article.is_delete        as isDelete
+        from article,
+             tag_category as category,
+             article_tag,
+             user
+        where article.is_delete = false
+          and article.a_id = article_tag.a_id
+          and article.a_category_id = category.t_id
+          and category.is_category = true
+          and article.a_author_id = user.u_id
+        group by article.a_id
+        order by article.a_id desc
     </select>