评论功能

pom.xml

@@ -19,6 +19,13 @@
             <artifactId>spring-boot-starter</artifactId>
         </dependency>
 
+
+        <dependency>
+            <groupId>org.mybatis</groupId>
+            <artifactId>mybatis</artifactId>
+            <version>3.5.10</version>
+        </dependency>
+
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
@@ -123,8 +130,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>9</source>
+                    <target>9</target>
                     <encoding>UTF-8</encoding>
                 </configuration>
             </plugin>

src/main/java/com/bao/dating/common/Comments.java

@@ -0,0 +1,19 @@
+package com.bao.dating.common;
+
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+
+/**
+ * 评论表
+ */
+@Data
+public class Comments {
+    private Long comment_id;   // 评论ID
+    private String content;  // 评论内容
+    private Long user_id;     // 评论人ID
+    private Long post_id;  // 关联动态ID
+    private LocalDateTime created_at; // 评论时间
+}

src/main/java/com/bao/dating/common/Post.java

@@ -0,0 +1,16 @@
+package com.bao.dating.common;
+
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+/**
+ * 动态表
+ */
+@Data
+public class Post {
+    private Long post_id;         // 动态ID
+    private String content;  // 动态内容
+    private Long user_id;     // 发布人ID
+    private LocalDateTime created_at; // 创建时间
+}

src/main/java/com/bao/dating/controller/CommentController.java

@@ -0,0 +1,48 @@
+package com.bao.dating.controller;
+
+
+import com.bao.dating.common.Comments;
+import com.bao.dating.service.CommentsService;
+import org.springframework.web.bind.annotation.*;
+
+import javax.annotation.Resource;
+import java.util.List;
+import java.util.Map;
+
+@RestController
+@RequestMapping("/comments")
+@CrossOrigin  // 解决跨域问题（前后端分离必加）
+public class CommentController {
+    @Resource
+    private CommentsService commentsService;
+
+    /**
+     * 添加评论
+     * @param comment 评论对象（含content、userId、dynamicId）
+     */
+    @PostMapping("/add")
+    public Map<String, Object> addComment(@RequestBody Comments comment) {
+        boolean success = commentsService.addComment(comment);
+        return success ? Map.of("code", 200, "msg", "评论成功") : Map.of("code", 500, "msg", "评论失败");
+    }
+
+    /**
+     * 删除评论
+     * @param user_id 评论ID
+     */
+    @DeleteMapping("/delete/{user_id}")
+    public Map<String, Object> deleteComment(@PathVariable Long user_id) {
+        boolean success = commentsService.deleteComment(user_id);
+        return success ? Map.of("code", 200, "msg", "删除成功") : Map.of("code", 500, "msg", "删除失败");
+    }
+
+    /**
+     * 根据动态ID查询评论列表
+     * @param post_id 动态ID
+     */
+    @GetMapping("/list/{post_id}")
+    public Map<String, Object> getCommentList(@PathVariable Long post_id) {
+        List<Comments> commentList = commentsService.getCommentByPostId(post_id);
+        return Map.of("code", 200, "data", commentList);
+    }
+}

src/main/java/com/bao/dating/mapper/CommentsMapper.java

@@ -0,0 +1,22 @@
+package com.bao.dating.mapper;
+
+
+import com.bao.dating.common.Comments;
+import com.bao.dating.common.Post;
+import org.apache.ibatis.annotations.*;
+
+import java.util.List;
+
+public interface CommentsMapper {
+    // 添加评论
+    @Insert("INSERT INTO comments(content, user_id, post_id, created_at) VALUES(#{content}, #{user_id}, #{post_id}, #{created_at})")
+    int addComment(Comments comments);
+
+    // 删除评论
+    @Delete("DELETE FROM comments WHERE user_id = #{user_id}")
+    int deleteComments(@Param("user_id") Long user_id);
+
+    // 根据动态ID查询评论列表
+    @Select("SELECT * FROM comments WHERE post_id = #{post_id} ORDER BY created_at DESC")
+    List<Comments> getCommentsByPostId(@Param("post_id") Long post_id);
+}

src/main/java/com/bao/dating/service/CommentsService.java

@@ -0,0 +1,20 @@
+package com.bao.dating.service;
+
+
+import com.bao.dating.common.Comments;
+
+import java.util.List;
+
+public interface CommentsService{
+    // 添加评论
+    boolean addComment(Comments comments);
+
+    // 删除评论
+    boolean deleteComment(Long user_id);
+
+    // 根据动态ID查询评论
+    List<Comments> getCommentByPostId(Long post_id);
+
+
+
+}

src/main/java/com/bao/dating/service/impl/CommentsServiceImpl.java

@@ -0,0 +1,39 @@
+package com.bao.dating.service.impl;
+
+import com.bao.dating.common.Comments;
+
+import com.bao.dating.mapper.CommentsMapper;
+
+
+import com.bao.dating.service.CommentsService;
+import org.springframework.stereotype.Service;
+
+
+import javax.annotation.Resource;
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Service
+public class CommentsServiceImpl implements CommentsService {
+
+
+
+    @Resource
+    private CommentsMapper commentsMapper;
+
+    @Override
+    public boolean addComment(Comments comments) {
+        // 设置创建时间
+        comments.setCreated_at(LocalDateTime.now());
+        return commentsMapper.addComment(comments) > 0;
+    }
+    @Override
+    public boolean deleteComment(Long user_id) {
+        return commentsMapper.deleteComments(user_id) > 0;
+    }
+
+    @Override
+    public List<Comments> getCommentByPostId(Long post_id) {
+        return commentsMapper.getCommentsByPostId(post_id);
+    }
+}