重构部分表与接口，新增帖子，评论的相关接口

珞珈岛-项目相关文件/luojia-island/pom.xml

@@ -106,6 +106,12 @@
             <artifactId>commons-codec</artifactId>
             <version>1.15</version>
         </dependency>
+
+        <!-- websocket -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-websocket</artifactId>
+        </dependency>
     </dependencies>
 
     <build>

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/message/config/WebSocketConfig.java

@@ -0,0 +1,17 @@
+package com.luojia_channel.modules.message.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.socket.config.annotation.EnableWebSocket;
+import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
+import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
+
+@Configuration
+@EnableWebSocket
+public class WebSocketConfig implements WebSocketConfigurer {
+    @Override
+    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
+        registry.addHandler(new MyWebSocketHandler(), "/ws")
+                .setAllowedOrigins("*"); // 允许跨域
+    }
+
+}

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/message/mq/AbstractSendProduceTemplate.java

@@ -0,0 +1,44 @@
+package com.luojia_channel.modules.message.mq;
+
+import com.alibaba.fastjson.JSON;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.amqp.rabbit.core.RabbitTemplate;
+import org.springframework.messaging.MessageHeaders;
+
+@Slf4j
+@RequiredArgsConstructor
+// 模板方法类，提供消息发送的模板方法
+public abstract class AbstractSendProduceTemplate<T> {
+
+    private final RabbitTemplate rabbitTemplate;
+    private static final String KEYS = "keys";
+
+    protected abstract BaseSendExtendDTO buildBaseSendParam(T messageSendEvent);
+
+    public void sendMessage(T messageSendEvent) {
+        BaseSendExtendDTO baseSendDTO = buildBaseSendParam(messageSendEvent);
+        try {
+            // 发送消息
+            rabbitTemplate.convertAndSend(
+                    baseSendDTO.getExchange(),
+                    baseSendDTO.getRoutingKey(),
+                    new MessageWrapper(baseSendDTO.getKeys(), messageSendEvent),
+                    m -> {
+                        // 设置消息头
+                        m.getMessageProperties().setHeader(KEYS, baseSendDTO.getKeys());
+                        // 设置消息属性（如延迟时间） TODO 若需要延迟消息，需安装延时插件
+                        if (baseSendDTO.getDelay() != null) {
+                            // m.getMessageProperties().setDelay(baseSendDTO.getDelay());
+                        }
+                        return m;
+                    }
+            );
+            log.info("[{}] 消息发送成功，Exchange：{}，Routing Key：{}",
+                    baseSendDTO.getEventName(), baseSendDTO.getExchange(), baseSendDTO.getRoutingKey());
+        } catch (Throwable ex) {
+            log.error("[{}] 消息发送失败，消息体：{}", baseSendDTO.getEventName(), JSON.toJSONString(messageSendEvent), ex);
+            throw ex;
+        }
+    }
+}

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/message/mq/BaseSendExtendDTO.java

@@ -0,0 +1,18 @@
+package com.luojia_channel.modules.message.mq;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public final class BaseSendExtendDTO {
+    private String eventName;       //业务名称
+    private String exchange;      //交换机
+    private String routingKey;    //路由键
+    private String keys;        // 消息唯一标识
+    private Long delay;        // 延迟时间（毫秒），需RabbitMQ安装延迟插件
+}

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/message/mq/MessageWrapper.java

@@ -0,0 +1,41 @@
+package com.luojia_channel.modules.message.mq;
+
+import lombok.*;
+
+import java.io.Serializable;
+import java.util.UUID;
+
+/**
+ * 消息体包装器
+ */
+@Data
+@Builder
+@NoArgsConstructor(force = true)
+@AllArgsConstructor
+@RequiredArgsConstructor
+public final class MessageWrapper<T> implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * 消息发送 Keys
+     */
+    @NonNull
+    private String keys;
+
+    /**
+     * 消息体
+     */
+    @NonNull
+    private T message;
+
+    /**
+     * 唯一标识，用于客户端幂等验证
+     */
+    private String uuid = UUID.randomUUID().toString();
+
+    /**
+     * 消息发送时间
+     */
+    private Long timestamp = System.currentTimeMillis();
+}

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/controller/CommentController.java

@@ -4,61 +4,58 @@ import com.luojia_channel.common.domain.Result;
 import com.luojia_channel.common.domain.page.PageResponse;
 import com.luojia_channel.common.utils.UserContext;
 import com.luojia_channel.modules.post.dto.req.CommentPageQueryDTO;
+import com.luojia_channel.modules.post.dto.req.CommentSaveDTO;
 import com.luojia_channel.modules.post.dto.resp.CommentInfoDTO;
 import com.luojia_channel.modules.post.entity.Comment;
 import com.luojia_channel.modules.post.service.CommentService;
+import com.luojia_channel.modules.post.utils.ValidatePostUtil;
+import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
 
-
+@RequiredArgsConstructor
 @RestController
 @RequestMapping("/comments")
 public class CommentController {
 
     private final CommentService commentService;
 
-    @Autowired
-    public CommentController(CommentService commentService) {
-        this.commentService = commentService;
-    }
-
     // 创建评论
     @PostMapping
-    public Result<Void> saveComment(@RequestBody Comment comment) {
+    public Result<Void> saveComment(@RequestBody CommentSaveDTO commentSaveDTO) {
-        commentService.saveComment(comment);
+        commentService.saveComment(commentSaveDTO);
         return Result.success();
     }
 
     // 更新评论
-    @PutMapping("/{id}")
+    @PutMapping
-    public Result<Void> updateComment(@PathVariable Long id, @RequestBody Comment comment) {
+    public Result<Void> updateComment(@RequestBody CommentSaveDTO commentSaveDTO) {
-        Long currentUserId = UserContext.getUserId();
+        commentService.updateComment(commentSaveDTO);
-        commentService.updateComment(comment, currentUserId);
         return Result.success();
     }
 
     // 删除评论
-    @DeleteMapping("/{id}")
+    @DeleteMapping
-    public Result<Void> deleteComment(@PathVariable Long id) {
+    public Result<Void> deleteComment(@RequestParam("id") Long id) {
-        Long currentUserId = UserContext.getUserId();
+        commentService.deleteComment(id);
-        commentService.deleteComment(id, currentUserId);
         return Result.success();
     }
 
-    // 根据帖子ID分页获取评论
+    // 根据帖子ID分页获取根评论
     @GetMapping("/list")
     public Result<PageResponse<CommentInfoDTO>> getCommentsByPostId(@RequestBody CommentPageQueryDTO commentPageQueryDTO) {
         PageResponse<CommentInfoDTO> commentList = commentService.getCommentsByPostId(commentPageQueryDTO);
         return Result.success(commentList);
     }
 
-    // 根据帖子ID获取嵌套评论
+
-    @GetMapping("/nested/post/{postId}")
+    // 根据评论ID获取回复
-    public Result<List<CommentInfoDTO>> getNestedCommentsByPostId(@PathVariable Long postId) {
+    @GetMapping("/list/reply")
-        List<CommentInfoDTO> nestedComments = commentService.getNestedCommentsByPostId(postId);
+    public Result<PageResponse<CommentInfoDTO>> getReplyById(@RequestBody CommentPageQueryDTO commentPageQueryDTO) {
-        return Result.success(nestedComments);
+        PageResponse<CommentInfoDTO> commentInfoDTOList = commentService.getReplyById(commentPageQueryDTO);
+        return Result.success(commentInfoDTOList);
     }
 
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/controller/PostController.java

@@ -6,6 +6,7 @@ import com.luojia_channel.common.domain.page.PageResponse;
 import com.luojia_channel.modules.post.dto.req.PostSaveDTO;
 import com.luojia_channel.modules.post.dto.req.PostPageQueryDTO;
 import com.luojia_channel.modules.post.dto.resp.PostBasicInfoDTO;
+import com.luojia_channel.modules.post.dto.resp.PostInfoDTO;
 import com.luojia_channel.modules.post.entity.Post;
 import com.luojia_channel.modules.post.service.PostService;
 import lombok.RequiredArgsConstructor;
@@ -48,7 +49,7 @@ public class PostController {
 
     // 根据ID获取帖子详情
     @GetMapping("/detail")
-    public Post getPostDetail(@RequestParam("id") Long id) {
+    public PostInfoDTO getPostDetail(@RequestParam("id") Long id) {
         return postService.getPostDetail(id);
     }
 

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/dto/req/CommentPageQueryDTO.java

@@ -5,5 +5,6 @@ import lombok.Data;
 
 @Data
 public class CommentPageQueryDTO extends PageRequest {
-    private Integer postId;
+    private Long postId;
+    private Long commentId;
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/dto/req/PostSaveDTO.java

@@ -4,6 +4,7 @@ import lombok.Data;
 
 @Data
 public class PostSaveDTO {
+    private Long id;
     private String title;
     private String image;
     private String content;

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/dto/resp/CommentInfoDTO.java

@@ -15,12 +15,16 @@ import java.util.List;
 public class CommentInfoDTO {
     private Long id;
     private String content;
+    private Long likeCount;
+    private Long replyCount;
     private Long userId;
-    private String postType;
     private Long postId;
     private Long parentCommentId;
     private Long topId;
     private LocalDateTime createTime;
 
+    private String userName;
+    private String userAvatar;
+
     private List<CommentInfoDTO> commentInfoDTOList;
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/dto/resp/PostInfoDTO.java

@@ -1,22 +0,0 @@
-package com.luojia_channel.modules.post.dto.resp;
-
-import com.luojia_channel.modules.post.entity.Comment;
-
-import java.util.List;
-
-public class PostInfoDTO {
-    private Long id;
-    private String image;
-    private String title;
-    private Integer likeCount;
-    private Integer commentCount;
-    private Integer favoriteCount;
-    private String content;
-
-    private Boolean isLike;
-    private Long userId;
-    private String userName;
-    private String userAvatar;
-
-    private List<Comment> commentList;
-}

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/entity/Comment.java

@@ -16,8 +16,9 @@ import java.time.LocalDateTime;
 public class Comment {
     private Long id;
     private String content;
+    private Long likeCount;
+    private Long replyCount;
     private Long userId;
-    private String postType;
     private Long postId;
     private Long parentCommentId;
     private Long topId;

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/service/CommentService.java

@@ -2,6 +2,7 @@ package com.luojia_channel.modules.post.service;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.luojia_channel.common.domain.page.PageResponse;
 import com.luojia_channel.modules.post.dto.req.CommentPageQueryDTO;
+import com.luojia_channel.modules.post.dto.req.CommentSaveDTO;
 import com.luojia_channel.modules.post.dto.resp.CommentInfoDTO;
 import com.luojia_channel.modules.post.entity.Comment;
 import org.springframework.stereotype.Service;
@@ -11,13 +12,13 @@ import java.util.List;
 @Service
 public interface CommentService {
 
-    void saveComment(Comment comment);
+    void saveComment(CommentSaveDTO commentSaveDTO);
 
-    void updateComment(Comment comment, Long userId);
+    void updateComment(CommentSaveDTO commentSaveDTO);
 
-    void deleteComment(Long id, Long userId);
+    void deleteComment(Long id);
 
     PageResponse<CommentInfoDTO> getCommentsByPostId(CommentPageQueryDTO commentPageQueryDTO);
 
-    List<CommentInfoDTO> getNestedCommentsByPostId(Long postId);
+    PageResponse<CommentInfoDTO> getReplyById(CommentPageQueryDTO commentPageQueryDTO);
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/service/PostService.java

@@ -5,6 +5,7 @@ import com.luojia_channel.common.domain.page.PageResponse;
 import com.luojia_channel.modules.post.dto.req.PostSaveDTO;
 import com.luojia_channel.modules.post.dto.req.PostPageQueryDTO;
 import com.luojia_channel.modules.post.dto.resp.PostBasicInfoDTO;
+import com.luojia_channel.modules.post.dto.resp.PostInfoDTO;
 import com.luojia_channel.modules.post.entity.Post;
 import org.springframework.web.multipart.MultipartFile;
 
@@ -17,7 +18,7 @@ public interface PostService extends IService<Post> {
 
     void deletePost(Long id);
 
-    Post getPostDetail(Long id);
+    PostInfoDTO getPostDetail(Long id);
 
     PageResponse<PostBasicInfoDTO> pagePost(PostPageQueryDTO postPageQueryDTO);
 

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/service/impl/CommentServiceImpl.java

@@ -1,91 +1,150 @@
 package com.luojia_channel.modules.post.service.impl;
 
+import cn.hutool.core.bean.BeanUtil;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
-import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.luojia_channel.common.domain.page.PageResponse;
 import com.luojia_channel.common.exception.PostException;
 import com.luojia_channel.common.utils.PageUtil;
+import com.luojia_channel.common.utils.UserContext;
 import com.luojia_channel.modules.post.dto.req.CommentPageQueryDTO;
+import com.luojia_channel.modules.post.dto.req.CommentSaveDTO;
 import com.luojia_channel.modules.post.dto.resp.CommentInfoDTO;
 import com.luojia_channel.modules.post.dto.resp.PostBasicInfoDTO;
 import com.luojia_channel.modules.post.entity.Comment;
 import com.luojia_channel.modules.post.entity.Post;
 import com.luojia_channel.modules.post.mapper.CommentMapper;
 import com.luojia_channel.modules.post.service.CommentService;
+import com.luojia_channel.modules.post.utils.ValidatePostUtil;
+import com.luojia_channel.modules.user.entity.User;
+import com.luojia_channel.modules.user.mapper.UserMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
 public class CommentServiceImpl extends ServiceImpl<CommentMapper, Comment> implements CommentService {
 
-    private CommentMapper commentMapper;
+    private final ValidatePostUtil validatePostUtil;
+    private final CommentMapper commentMapper;
+    private final UserMapper userMapper;
 
     @Override
-    public void saveComment(Comment comment) {
+    @Transactional(rollbackFor = Exception.class)
-        comment.setCreateTime(LocalDateTime.now());
+    public void saveComment(CommentSaveDTO commentSaveDTO) {
-        comment.setUpdateTime(LocalDateTime.now());
+        validatePostUtil.validateComment(commentSaveDTO);
-        commentMapper.insert(comment);
+        Comment comment = BeanUtil.copyProperties(commentSaveDTO, Comment.class);
+        if(!save(comment)){
+            throw new PostException("创建评论失败");
+        }
+        Long parentCommentId = commentSaveDTO.getParentCommentId();
+        if(parentCommentId != null){
+            LambdaUpdateWrapper<Comment> updateWrapper = Wrappers.lambdaUpdate(Comment.class)
+                    .eq(Comment::getId, parentCommentId)
+                    .setSql("reply_count = reply_count + 1");
+            int update = commentMapper.update(null, updateWrapper);
+            if(update  <= 0) {
+                throw new PostException("回复评论失败");
+            }
+            Long topId = commentSaveDTO.getTopId();
+            // 更新顶级评论回复数
+            if(!parentCommentId.equals(topId)){
+                updateWrapper = Wrappers.lambdaUpdate(Comment.class)
+                        .eq(Comment::getId, topId)
+                        .setSql("reply_count = reply_count + 1");
+                update = commentMapper.update(null, updateWrapper);
+                if(update  <= 0) {
+                    throw new PostException("回复顶级评论失败");
+                }
+            }
+
+            // TODO 消息通知
+
+        }
+
     }
 
     @Override
-    public void updateComment(Comment comment, Long userId) {
+    public void updateComment(CommentSaveDTO commentSaveDTO) {
-        validatePostOwnership(comment.getId(), userId);
+        validatePostUtil.validateComment(commentSaveDTO);
+        validatePostUtil.validateCommentOwnership(commentSaveDTO.getId());
+        Comment comment = BeanUtil.copyProperties(commentSaveDTO, Comment.class);
         comment.setUpdateTime(LocalDateTime.now());
         if(!updateById(comment)){
-            throw new PostException("更新帖子失败");
+            throw new PostException("更新评论失败");
         }
     }
 
     @Override
-    public void deleteComment(Long id, Long userId) {
+    public void deleteComment(Long id) {
-        validatePostOwnership(id, userId);
+        validatePostUtil.validateCommentOwnership(id);
-        commentMapper.deleteById(id);
+        LambdaQueryWrapper<Comment> queryWrapper = Wrappers.lambdaQuery(Comment.class)
+                .eq(Comment::getTopId, id);
+        int delete = commentMapper.delete(queryWrapper);
+        if(delete <= 0) {
+            throw new PostException("删除评论失败");
+        }
+        // TODO 如果根评论删除，那么其他评论怎么办，目前做法是删除其下所有的子评论
     }
 
+    // 分页查询一系列根评论
     @Override
     public PageResponse<CommentInfoDTO> getCommentsByPostId(CommentPageQueryDTO commentPageQueryDTO) {
+        if(commentPageQueryDTO.getPostId() == null || commentPageQueryDTO.getPostId() < 0){
+            throw new PostException("帖子id不合法");
+        }
         LambdaQueryWrapper<Comment> queryWrapper = Wrappers.lambdaQuery(Comment.class)
                 .eq(Comment::getPostId, commentPageQueryDTO.getPostId())
+                .eq(Comment::getParentCommentId, 0L)
                 .orderByDesc(Comment::getCreateTime);
-        IPage<Comment> commentPage = commentMapper.selectPage(PageUtil.convert(commentPageQueryDTO), queryWrapper);
+        return getCommentInfoDTOPageResponse(commentPageQueryDTO, queryWrapper);
-        return PageUtil.convert(commentPage, CommentInfoDTO.class);
     }
 
     @Override
-    public List<CommentInfoDTO> getNestedCommentsByPostId(Long postId) {
+    public PageResponse<CommentInfoDTO> getReplyById(CommentPageQueryDTO commentPageQueryDTO) {
-        LambdaQueryWrapper<Comment> queryWrapper = new LambdaQueryWrapper<>();
+        if(commentPageQueryDTO.getCommentId() == null || commentPageQueryDTO.getCommentId() < 0){
-        queryWrapper.eq(Comment::getPostId, postId)
+            throw new PostException("评论id不合法");
-                .orderByAsc(Comment::getCreateTime);
-
-        List<Comment> comments = commentMapper.selectList(queryWrapper);
-        return buildNestedComments(comments);
-    }
-
-    private void validatePostOwnership(Long commentId, Long userId) {
-        Comment comment = commentMapper.selectById(commentId);
-        if (comment == null) {
-            throw new PostException("评论不存在");
-        }
-        if (!userId.equals(comment.getUserId())) {
-            throw new PostException("你无权操作他人的评论");
         }
+        LambdaQueryWrapper<Comment> queryWrapper = Wrappers.lambdaQuery(Comment.class)
+                .eq(Comment::getTopId, commentPageQueryDTO.getCommentId())
+                .orderByDesc(Comment::getCreateTime);
+        return getCommentInfoDTOPageResponse(commentPageQueryDTO, queryWrapper);
     }
 
-    private List<CommentInfoDTO> convertToDTO(List<Comment> comments) {
+    private PageResponse<CommentInfoDTO> getCommentInfoDTOPageResponse(CommentPageQueryDTO commentPageQueryDTO, LambdaQueryWrapper<Comment> queryWrapper) {
+        IPage<Comment> commentPage = commentMapper.selectPage(PageUtil.convert(commentPageQueryDTO), queryWrapper);
+        List<Long> userIds = new ArrayList<>();
+        commentPage.getRecords().forEach(comment -> {
+            userIds.add(comment.getUserId());
+        });
+        List<User> users = userMapper.selectBatchIds(userIds);
+        Map<Long, User> userMap = users.stream()
+                .collect(Collectors.toMap(User::getId, user -> user));
+        return PageUtil.convert(commentPage, (comment) -> {
+            CommentInfoDTO commentInfoDTO = BeanUtil.copyProperties(comment, CommentInfoDTO.class);
+            User user = userMap.getOrDefault(comment.getUserId(), new User());
+            commentInfoDTO.setUserAvatar(user.getAvatar());
+            commentInfoDTO.setUserName(user.getUsername());
+            return commentInfoDTO;
+        });
+    }
+
+    private List<CommentInfoDTO> convertToDTO(List<Comment> commentList) {
         List<CommentInfoDTO> dtos = new ArrayList<>();
-        for (Comment comment : comments) {
+        for (Comment comment : commentList) {
             CommentInfoDTO dto = new CommentInfoDTO();
             BeanUtils.copyProperties(comment, dto);
             dtos.add(dto);
@@ -93,16 +152,14 @@ public class CommentServiceImpl extends ServiceImpl<CommentMapper, Comment> impl
         return dtos;
     }
 
-    private List<CommentInfoDTO> buildNestedComments(List<Comment> comments) {
+    // 根据评论创建嵌套评论,目前没用到
+    private List<CommentInfoDTO> buildNestedCommentList(List<Comment> comments) {
         Map<Long, CommentInfoDTO> map = new HashMap<>();
         List<CommentInfoDTO> rootComments = new ArrayList<>();
-
         for (Comment comment : comments) {
             CommentInfoDTO dto = new CommentInfoDTO();
             BeanUtils.copyProperties(comment, dto);
-
             map.put(comment.getId(), dto);
-
             if (comment.getParentCommentId() == null) {
                 rootComments.add(dto);
             } else {
@@ -115,7 +172,6 @@ public class CommentServiceImpl extends ServiceImpl<CommentMapper, Comment> impl
                 }
             }
         }
-
         return rootComments;
     }
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/service/impl/PostServiceImpl.java

@@ -11,18 +11,28 @@ import com.luojia_channel.common.utils.PageUtil;
 import com.luojia_channel.common.utils.RedisUtil;
 import com.luojia_channel.common.utils.UserContext;
 import com.luojia_channel.modules.file.service.impl.FileServiceImpl;
+import com.luojia_channel.modules.post.dto.req.CommentPageQueryDTO;
 import com.luojia_channel.modules.post.dto.req.PostSaveDTO;
 import com.luojia_channel.modules.post.dto.req.PostPageQueryDTO;
+import com.luojia_channel.modules.post.dto.resp.CommentInfoDTO;
 import com.luojia_channel.modules.post.dto.resp.PostBasicInfoDTO;
+import com.luojia_channel.modules.post.dto.resp.PostInfoDTO;
+import com.luojia_channel.modules.post.entity.Comment;
 import com.luojia_channel.modules.post.entity.Post;
 import com.luojia_channel.modules.post.mapper.PostMapper;
 import com.luojia_channel.modules.post.service.PostService;
 import com.luojia_channel.modules.post.utils.ValidatePostUtil;
+import com.luojia_channel.modules.user.entity.User;
+import com.luojia_channel.modules.user.mapper.UserMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.web.multipart.MultipartFile;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
@@ -32,13 +42,12 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
     private final FileServiceImpl fileService;
     private final ValidatePostUtil validatePostUtil;
     private final RedisUtil redisUtil;
+    private final UserMapper userMapper;
 
     @Override
     public void createPost(PostSaveDTO postSaveDTO) {
         validatePostUtil.validatePost(postSaveDTO);
-        Long userId = UserContext.getUserId();
         Post post = BeanUtil.copyProperties(postSaveDTO, Post.class);
-        post.setUserId(userId);
         if(!save(post)){
             throw new PostException("创建帖子失败");
         }
@@ -52,6 +61,7 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
     @Override
     public void updatePost(PostSaveDTO postSaveDTO) {
         validatePostUtil.validatePost(postSaveDTO);
+        validatePostUtil.validatePostOwnership(postSaveDTO.getId());
         Post post = BeanUtil.copyProperties(postSaveDTO, Post.class);
         post.setUpdateTime(LocalDateTime.now());
         if(!updateById(post)){
@@ -69,15 +79,21 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
     }
 
     @Override
-    public Post getPostDetail(Long id) {
+    public PostInfoDTO getPostDetail(Long id) {
-        return redisUtil.safeGet("post:detail" + id.toString(), Post.class,
+        return redisUtil.safeGet("post:detail" + id.toString(), PostInfoDTO.class,
                 () -> {
                     Post post = getById(id);
                     if(post == null){
                         throw new PostException("帖子不存在或被删除");
                     }
-                    return post;
+                    PostInfoDTO postInfoDTO = BeanUtil.copyProperties(post, PostInfoDTO.class);
-                }, 10, TimeUnit.MINUTES);
+                    User user = userMapper.selectOne(Wrappers.lambdaQuery(User.class)
+                            .eq(User::getId, post.getUserId()));
+                    postInfoDTO.setUserAvatar(user.getAvatar());
+                    postInfoDTO.setUserName(user.getUsername());
+                    return postInfoDTO;
+                },
+                60, TimeUnit.MINUTES);
     }
 
     @Override
@@ -86,10 +102,23 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
         LambdaQueryWrapper<Post> queryWrapper = Wrappers.lambdaQuery(Post.class)
                 .orderByDesc(Post::getCreateTime);
         IPage<Post> postPage = postMapper.selectPage(PageUtil.convert(postPageQueryDTO), queryWrapper);
-        return PageUtil.convert(postPage, PostBasicInfoDTO.class);
+        List<Long> userIds = new ArrayList<>();
+        postPage.getRecords().forEach(comment -> {
+            userIds.add(comment.getUserId());
+        });
+        List<User> users = userMapper.selectBatchIds(userIds);
+        Map<Long, User> userMap = users.stream()
+                .collect(Collectors.toMap(User::getId, user -> user));
+        // 组装用户头像与名称，批量查询只要查一次数据库
+        return PageUtil.convert(postPage, post -> {
+            PostBasicInfoDTO postBasicInfoDTO = BeanUtil.copyProperties(post, PostBasicInfoDTO.class);
+            User user = userMap.getOrDefault(post.getUserId(), new User());
+            postBasicInfoDTO.setUserAvatar(user.getAvatar());
+            postBasicInfoDTO.setUserName(user.getUsername());
+            return postBasicInfoDTO;
+        });
     }
 
-
     @Override
     public PageResponse<PostBasicInfoDTO> pagePostOfMe(PostPageQueryDTO postPageQueryDTO) {
         Long userId = UserContext.getUserId();
@@ -99,4 +128,5 @@ public class PostServiceImpl extends ServiceImpl<PostMapper, Post> implements Po
         IPage<Post> postPage = postMapper.selectPage(PageUtil.convert(postPageQueryDTO), queryWrapper);
         return PageUtil.convert(postPage, PostBasicInfoDTO.class);
     }
+
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/java/com/luojia_channel/modules/post/utils/ValidatePostUtil.java

@@ -3,8 +3,11 @@ package com.luojia_channel.modules.post.utils;
 import cn.hutool.core.util.StrUtil;
 import com.luojia_channel.common.exception.PostException;
 import com.luojia_channel.common.utils.UserContext;
+import com.luojia_channel.modules.post.dto.req.CommentSaveDTO;
 import com.luojia_channel.modules.post.dto.req.PostSaveDTO;
+import com.luojia_channel.modules.post.entity.Comment;
 import com.luojia_channel.modules.post.entity.Post;
+import com.luojia_channel.modules.post.mapper.CommentMapper;
 import com.luojia_channel.modules.post.mapper.PostMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Component;
@@ -16,6 +19,8 @@ public class ValidatePostUtil {
 
     private final PostMapper postMapper;
 
+    private final CommentMapper commentMapper;
+
     public void validatePost(PostSaveDTO postSaveDTO) {
         // 非空字段检验
         if (StrUtil.isBlank(postSaveDTO.getTitle())) {
@@ -34,6 +39,9 @@ public class ValidatePostUtil {
 
     public void validatePostOwnership(Long id){
         Long userId = UserContext.getUserId();
+        if(id == null){
+            throw new PostException("传入id不能为空");
+        }
         Post post = postMapper.selectById(id);
         if(post == null){
             throw new PostException("帖子不存在");
@@ -43,7 +51,32 @@ public class ValidatePostUtil {
         }
     }
 
-    public void AIValidate(PostSaveDTO postSaveDTO){
+    public void validateComment(CommentSaveDTO commentSaveDTO) {
+        if (StrUtil.isBlank(commentSaveDTO.getContent())) {
+            throw new PostException("内容不能为空");
+        }
+        if (commentSaveDTO.getPostId() == null || commentSaveDTO.getPostId() < 0){
+            throw new PostException("帖子id不合法");
+        }
+        if(commentSaveDTO.getParentCommentId() != null && commentSaveDTO.getParentCommentId() < 0){
+            throw new PostException("父评论id不合法");
+        }
+        if(commentSaveDTO.getTopId() != null && commentSaveDTO.getTopId() <= 0){
+            throw new PostException("顶级评论id不合法");
+        }
+    }
 
+    public void validateCommentOwnership(Long id) {
+        Long userId = UserContext.getUserId();
+        if(id == null){
+            throw new PostException("传入id不能为空");
+        }
+        Comment comment = commentMapper.selectById(id);
+        if(comment == null){
+            throw new PostException("评论不存在");
+        }
+        if(!userId.equals(comment.getUserId())){
+            throw new PostException("你无权操作他人的评论");
+        }
     }
 }

珞珈岛-项目相关文件/luojia-island/service/src/main/resources/db/luojia_channel.sql

@@ -101,10 +101,11 @@ DROP TABLE IF EXISTS `comment`;
 CREATE TABLE `comment` (
                            `id` BIGINT PRIMARY KEY AUTO_INCREMENT COMMENT '主键ID',
                            `content` TEXT NOT NULL COMMENT '评论内容',
+                           `like_count` INT DEFAULT 0 COMMENT '点赞数',
+                           `reply_count` INT DEFAULT 0 COMMENT '回复数',
                            `user_id` BIGINT NOT NULL COMMENT '评论用户ID',
-                           `post_type` VARCHAR(20) NOT NULL COMMENT '帖子类型（post/video）',
                            `post_id` BIGINT NOT NULL COMMENT '关联的帖子ID',
-                           `parent_comment_id` BIGINT COMMENT '父评论ID',
+                           `parent_comment_id` BIGINT DEFAULT 0 COMMENT '父评论ID',
                            `top_id` BIGINT COMMENT '顶层评论ID',
                            `create_time` DATETIME DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
                            `update_time` DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',