diff --git a/backend/src/main/java/com/openisle/config/CachingConfig.java b/backend/src/main/java/com/openisle/config/CachingConfig.java
index 7497d1024..9094efa1a 100644
--- a/backend/src/main/java/com/openisle/config/CachingConfig.java
+++ b/backend/src/main/java/com/openisle/config/CachingConfig.java
@@ -46,6 +46,8 @@ public class CachingConfig {
     public static final String LIMIT_CACHE_NAME="openisle_limit";
     // 用户访问统计
     public static final String VISIT_CACHE_NAME="openisle_visit";
+    // 文章缓存
+    public static final String POST_CACHE_NAME="openisle_posts";
 
     /**
      * 自定义Redis的序列化器
@@ -65,7 +67,10 @@ public class CachingConfig {
         // Hibernate6Module 可以自动处理懒加载代理对象。
         // Tag对象的creator是FetchType.LAZY
         objectMapper.registerModule(new Hibernate6Module()
-                .disable(Hibernate6Module.Feature.USE_TRANSIENT_ANNOTATION));
+                .disable(Hibernate6Module.Feature.USE_TRANSIENT_ANNOTATION)
+                // 将 Hibernate 特有的集合类型转换为标准 Java 集合类型
+                // 避免序列化时出现 org.hibernate.collection.spi.PersistentSet 这样的类型信息
+                .configure(Hibernate6Module.Feature.REPLACE_PERSISTENT_COLLECTIONS, true));
         // service的时候带上类型信息
         // 启用类型信息，避免 LinkedHashMap 问题
         objectMapper.activateDefaultTyping(
diff --git a/backend/src/main/java/com/openisle/controller/PostController.java b/backend/src/main/java/com/openisle/controller/PostController.java
index 002455900..907358c30 100644
--- a/backend/src/main/java/com/openisle/controller/PostController.java
+++ b/backend/src/main/java/com/openisle/controller/PostController.java
@@ -27,6 +27,8 @@ import java.util.stream.Collectors;
 @RequiredArgsConstructor
 public class PostController {
     private final PostService postService;
+    private final CategoryService categoryService;
+    private final TagService tagService;
     private final LevelService levelService;
     private final CaptchaService captchaService;
     private final DraftService draftService;
@@ -147,33 +149,16 @@ public class PostController {
                                    @RequestParam(value = "page", required = false) Integer page,
                                    @RequestParam(value = "pageSize", required = false) Integer pageSize,
                                    Authentication auth) {
-        List<Long> ids = categoryIds;
-        if (categoryId != null) {
-            ids = java.util.List.of(categoryId);
-        }
-        List<Long> tids = tagIds;
-        if (tagId != null) {
-            tids = java.util.List.of(tagId);
-        }
+
+        List<Long> ids = categoryService.getSearchCategoryIds(categoryIds, categoryId);
+        List<Long> tids = tagService.getSearchTagIds(tagIds, tagId);
 // 只需要在请求的一开始统计一次
 //        if (auth != null) {
 //            userVisitService.recordVisit(auth.getName());
 //        }
 
-        boolean hasCategories = ids != null && !ids.isEmpty();
-        boolean hasTags = tids != null && !tids.isEmpty();
-
-        if (hasCategories && hasTags) {
-            return postService.listPostsByCategoriesAndTags(ids, tids, page, pageSize)
-                    .stream().map(postMapper::toSummaryDto).collect(Collectors.toList());
-        }
-        if (hasTags) {
-            return postService.listPostsByTags(tids, page, pageSize)
-                .stream().map(postMapper::toSummaryDto).collect(Collectors.toList());
-        }
-
-        return postService.listPostsByCategories(ids, page, pageSize)
-                .stream().map(postMapper::toSummaryDto).collect(Collectors.toList());
+        return postService.defaultListPosts(ids,tids,page, pageSize).stream()
+                .map(postMapper::toSummaryDto).collect(Collectors.toList());
     }
 
     @GetMapping("/ranking")
@@ -187,14 +172,9 @@ public class PostController {
                                       @RequestParam(value = "page", required = false) Integer page,
                                       @RequestParam(value = "pageSize", required = false) Integer pageSize,
                                       Authentication auth) {
-        List<Long> ids = categoryIds;
-        if (categoryId != null) {
-            ids = java.util.List.of(categoryId);
-        }
-        List<Long> tids = tagIds;
-        if (tagId != null) {
-            tids = java.util.List.of(tagId);
-        }
+
+        List<Long> ids = categoryService.getSearchCategoryIds(categoryIds, categoryId);
+        List<Long> tids = tagService.getSearchTagIds(tagIds, tagId);
 // 只需要在请求的一开始统计一次
 //        if (auth != null) {
 //            userVisitService.recordVisit(auth.getName());
@@ -215,14 +195,9 @@ public class PostController {
                                           @RequestParam(value = "page", required = false) Integer page,
                                           @RequestParam(value = "pageSize", required = false) Integer pageSize,
                                           Authentication auth) {
-        List<Long> ids = categoryIds;
-        if (categoryId != null) {
-            ids = java.util.List.of(categoryId);
-        }
-        List<Long> tids = tagIds;
-        if (tagId != null) {
-            tids = java.util.List.of(tagId);
-        }
+
+        List<Long> ids = categoryService.getSearchCategoryIds(categoryIds, categoryId);
+        List<Long> tids = tagService.getSearchTagIds(tagIds, tagId);
 // 只需要在请求的一开始统计一次
 //        if (auth != null) {
 //            userVisitService.recordVisit(auth.getName());
@@ -243,14 +218,9 @@ public class PostController {
                                        @RequestParam(value = "page", required = false) Integer page,
                                        @RequestParam(value = "pageSize", required = false) Integer pageSize,
                                        Authentication auth) {
-        List<Long> ids = categoryIds;
-        if (categoryId != null) {
-            ids = java.util.List.of(categoryId);
-        }
-        List<Long> tids = tagIds;
-        if (tagId != null) {
-            tids = java.util.List.of(tagId);
-        }
+
+        List<Long> ids = categoryService.getSearchCategoryIds(categoryIds, categoryId);
+        List<Long> tids = tagService.getSearchTagIds(tagIds, tagId);
 // 只需要在请求的一开始统计一次
 //        if (auth != null) {
 //            userVisitService.recordVisit(auth.getName());
diff --git a/backend/src/main/java/com/openisle/model/Post.java b/backend/src/main/java/com/openisle/model/Post.java
index 3dcbbab3c..7e5df2a4f 100644
--- a/backend/src/main/java/com/openisle/model/Post.java
+++ b/backend/src/main/java/com/openisle/model/Post.java
@@ -39,19 +39,19 @@ public class Post {
             columnDefinition = "DATETIME(6) DEFAULT CURRENT_TIMESTAMP(6)")
     private LocalDateTime createdAt;
 
-    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @ManyToOne(optional = false, fetch = FetchType.EAGER)
     @JoinColumn(name = "author_id")
     private User author;
 
-    @ManyToOne(optional = false, fetch = FetchType.LAZY)
+    @ManyToOne(optional = false, fetch = FetchType.EAGER)
     @JoinColumn(name = "category_id")
     private Category category;
 
-    @ManyToMany(fetch = FetchType.LAZY)
+    @ManyToMany(fetch = FetchType.EAGER)
     @JoinTable(name = "post_tags",
             joinColumns = @JoinColumn(name = "post_id"),
             inverseJoinColumns = @JoinColumn(name = "tag_id"))
-    private java.util.Set<Tag> tags = new java.util.HashSet<>();
+    private Set<Tag> tags = new HashSet<>();
 
     @Column(nullable = false)
     private long views = 0;
diff --git a/backend/src/main/java/com/openisle/service/CategoryService.java b/backend/src/main/java/com/openisle/service/CategoryService.java
index 9486bc88c..309ae7f0d 100644
--- a/backend/src/main/java/com/openisle/service/CategoryService.java
+++ b/backend/src/main/java/com/openisle/service/CategoryService.java
@@ -62,4 +62,18 @@ public class CategoryService {
     public List<Category> listCategories() {
         return categoryRepository.findAll();
     }
+
+    /**
+     * 获取检索用的分类Id列表
+     * @param categoryIds
+     * @param categoryId
+     * @return
+     */
+    public List<Long> getSearchCategoryIds(List<Long> categoryIds, Long categoryId){
+        List<Long> ids = categoryIds;
+        if (categoryId != null) {
+            ids = List.of(categoryId);
+        }
+        return ids;
+    }
 }
diff --git a/backend/src/main/java/com/openisle/service/CommentService.java b/backend/src/main/java/com/openisle/service/CommentService.java
index 1076aa5e2..e9456caf7 100644
--- a/backend/src/main/java/com/openisle/service/CommentService.java
+++ b/backend/src/main/java/com/openisle/service/CommentService.java
@@ -1,5 +1,6 @@
 package com.openisle.service;
 
+import com.openisle.config.CachingConfig;
 import com.openisle.model.Comment;
 import com.openisle.model.Post;
 import com.openisle.model.User;
@@ -20,6 +21,8 @@ import com.openisle.model.Role;
 import com.openisle.exception.RateLimitException;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
@@ -47,6 +50,10 @@ public class CommentService {
     private final PointService pointService;
     private final ImageUploader imageUploader;
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'latest_reply'"
+    )
     @Transactional
     public Comment addComment(String username, Long postId, String content) {
         log.debug("addComment called by user {} for post {}", username, postId);
@@ -95,6 +102,10 @@ public class CommentService {
         return commentRepository.findLastCommentTimeOfUserByUserId(userId);
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'latest_reply'"
+    )
     @Transactional
     public Comment addReply(String username, Long parentId, String content) {
         log.debug("addReply called by user {} for parent comment {}", username, parentId);
@@ -228,6 +239,10 @@ public class CommentService {
         return count;
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'latest_reply'"
+    )
     @Transactional
     public void deleteComment(String username, Long id) {
         log.debug("deleteComment called by user {} for comment {}", username, id);
@@ -243,6 +258,10 @@ public class CommentService {
         log.debug("deleteComment completed for comment {}", id);
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'latest_reply'"
+    )
     @Transactional
     public void deleteCommentCascade(Comment comment) {
         log.debug("deleteCommentCascade called for comment {}", comment.getId());
diff --git a/backend/src/main/java/com/openisle/service/PostService.java b/backend/src/main/java/com/openisle/service/PostService.java
index 16162d32a..65092d0b7 100644
--- a/backend/src/main/java/com/openisle/service/PostService.java
+++ b/backend/src/main/java/com/openisle/service/PostService.java
@@ -1,17 +1,8 @@
 package com.openisle.service;
 
 import com.openisle.config.CachingConfig;
-import com.openisle.model.Post;
-import com.openisle.model.PostStatus;
-import com.openisle.model.PostType;
-import com.openisle.model.PublishMode;
-import com.openisle.model.User;
-import com.openisle.model.Category;
-import com.openisle.model.Comment;
-import com.openisle.model.NotificationType;
-import com.openisle.model.LotteryPost;
-import com.openisle.model.PollPost;
-import com.openisle.model.PollVote;
+import com.openisle.mapper.PostMapper;
+import com.openisle.model.*;
 import com.openisle.repository.PostRepository;
 import com.openisle.repository.LotteryPostRepository;
 import com.openisle.repository.PollPostRepository;
@@ -26,11 +17,12 @@ import com.openisle.repository.ReactionRepository;
 import com.openisle.repository.PostSubscriptionRepository;
 import com.openisle.repository.NotificationRepository;
 import com.openisle.repository.PollVoteRepository;
-import com.openisle.model.Role;
 import com.openisle.exception.RateLimitException;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Value;
+import org.springframework.cache.annotation.CacheEvict;
+import org.springframework.cache.annotation.Cacheable;
 import org.springframework.context.ApplicationContext;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.stereotype.Service;
@@ -52,6 +44,8 @@ import java.time.LocalDateTime;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.ScheduledFuture;
+import java.util.stream.Collectors;
+
 import org.springframework.boot.context.event.ApplicationReadyEvent;
 import org.springframework.context.event.EventListener;
 
@@ -195,12 +189,14 @@ public class PostService {
         pointService.awardForFeatured(saved.getAuthor().getUsername(), saved.getId());
         return saved;
     }
-
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME, allEntries = true
+    )
     public Post createPost(String username,
                            Long categoryId,
                            String title,
                            String content,
-                           java.util.List<Long> tagIds,
+                           List<Long> tagIds,
                            PostType type,
                            String prizeDescription,
                            String prizeIcon,
@@ -511,6 +507,10 @@ public class PostService {
         return listPostsByLatestReply(null, null, page, pageSize);
     }
 
+    @Cacheable(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'latest_reply'"
+    )
     public List<Post> listPostsByLatestReply(java.util.List<Long> categoryIds,
                                              java.util.List<Long> tagIds,
                                              Integer page,
@@ -538,9 +538,9 @@ public class PostService {
                 posts = postRepository.findByCategoryInAndStatusOrderByCreatedAtDesc(categories, PostStatus.PUBLISHED);
             }
         } else {
-            java.util.List<com.openisle.model.Tag> tags = tagRepository.findAllById(tagIds);
+            List<Tag> tags = tagRepository.findAllById(tagIds);
             if (tags.isEmpty()) {
-                return java.util.List.of();
+                return new ArrayList<>();
             }
             posts = postRepository.findByAllTagsOrderByCreatedAtDesc(tags, PostStatus.PUBLISHED, tags.size());
         }
@@ -638,11 +638,43 @@ public class PostService {
         return paginate(sortByPinnedAndCreated(posts), page, pageSize);
     }
 
+    /**
+     * 默认的文章列表
+     * @param ids
+     * @param tids
+     * @param page
+     * @param pageSize
+     * @return
+     */
+    @Cacheable(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
+    public List<Post> defaultListPosts(List<Long> ids, List<Long> tids, Integer page, Integer pageSize){
+        boolean hasCategories = !CollectionUtils.isEmpty(ids);
+        boolean hasTags = !CollectionUtils.isEmpty(tids);
+
+        if (hasCategories && hasTags) {
+            return listPostsByCategoriesAndTags(ids, tids, page, pageSize)
+                    .stream().collect(Collectors.toList());
+        }
+        if (hasTags) {
+            return listPostsByTags(tids, page, pageSize)
+                    .stream().collect(Collectors.toList());
+        }
+
+        return listPostsByCategories(ids, page, pageSize)
+                .stream().collect(Collectors.toList());
+    }
 
     public List<Post> listPendingPosts() {
         return postRepository.findByStatus(PostStatus.PENDING);
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
     public Post approvePost(Long id) {
         Post post = postRepository.findById(id)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
@@ -679,6 +711,10 @@ public class PostService {
         return post;
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
     public Post pinPost(Long id, String username) {
         Post post = postRepository.findById(id)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
@@ -691,6 +727,10 @@ public class PostService {
         return saved;
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
     public Post unpinPost(Long id, String username) {
         Post post = postRepository.findById(id)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
@@ -703,6 +743,10 @@ public class PostService {
         return saved;
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
     public Post closePost(Long id, String username) {
         Post post = postRepository.findById(id)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
@@ -718,6 +762,10 @@ public class PostService {
         return saved;
     }
 
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
     public Post reopenPost(Long id, String username) {
         Post post = postRepository.findById(id)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
@@ -733,7 +781,11 @@ public class PostService {
         return saved;
     }
 
-    @org.springframework.transaction.annotation.Transactional
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
+    @Transactional
     public Post updatePost(Long id,
                            String username,
                            Long categoryId,
@@ -786,7 +838,11 @@ public class PostService {
         return updated;
     }
 
-    @org.springframework.transaction.annotation.Transactional
+    @CacheEvict(
+            value = CachingConfig.POST_CACHE_NAME,
+            key = "'default'"
+    )
+    @Transactional
     public void deletePost(Long id, String username) {
         Post post = postRepository.findById(id)
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("Post not found"));
@@ -879,15 +935,17 @@ public class PostService {
                 .toList();
     }
 
-    private java.util.List<Post> paginate(java.util.List<Post> posts, Integer page, Integer pageSize) {
+    private List<Post> paginate(List<Post> posts, Integer page, Integer pageSize) {
         if (page == null || pageSize == null) {
             return posts;
         }
         int from = page * pageSize;
         if (from >= posts.size()) {
-            return java.util.List.of();
+            return new ArrayList<>();
         }
         int to = Math.min(from + pageSize, posts.size());
-        return posts.subList(from, to);
+        // 这里必须将list包装为arrayList类型，否则序列化会有问题
+        // list.sublist返回的是内部类
+        return new ArrayList<>(posts.subList(from, to));
     }
 }
diff --git a/backend/src/main/java/com/openisle/service/TagService.java b/backend/src/main/java/com/openisle/service/TagService.java
index eee84121e..02191427d 100644
--- a/backend/src/main/java/com/openisle/service/TagService.java
+++ b/backend/src/main/java/com/openisle/service/TagService.java
@@ -120,4 +120,18 @@ public class TagService {
                 .orElseThrow(() -> new com.openisle.exception.NotFoundException("User not found"));
         return tagRepository.findByCreator(user);
     }
+
+    /**
+     * 获取检索用的标签Id列表
+     * @param tagIds
+     * @param tagId
+     * @return
+     */
+    public List<Long> getSearchTagIds(List<Long> tagIds, Long tagId){
+        List<Long> ids = tagIds;
+        if (tagId != null) {
+            ids = List.of(tagId);
+        }
+        return ids;
+    }
 }