refactor: 分页查询

通过数据库进行分页查询而非查询全部然后分页

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);