feat(biji-houdaun): 支持 Markdown 文件上传、预览、编辑和创建

- 新增 Markdown 文件预览功能
- 更新 Markdown 文件创建和编辑接口，使用 Long 类型的 ID
- 优化图片上传接口，支持 Long 类型的用户 ID 和 Markdown ID
- 重构 MarkdownFileService接口，增加获取 Markdown 文件的方法
- 修改 MarkdownFileServiceImpl 实现类，支持新的 Markdown 文件操作

biji-houdaun/src/main/java/com/test/bijihoudaun/service/ImageService.java

@@ -16,7 +16,7 @@ public interface ImageService extends IService<Image> {
      * @return 上传的图片对象
      * @throws IOException 文件操作异常
      */
-    Image uploadImage(Integer userId, Integer markdownId, MultipartFile file) throws IOException;
+    Image uploadImage(Long userId, Long markdownId, MultipartFile file) throws IOException;
 
     /**
      * 删除图片
@@ -24,19 +24,19 @@ public interface ImageService extends IService<Image> {
      * @param userId 用户ID（用于权限验证）
      * @return 是否删除成功
      */
-    boolean deleteImage(Integer id, Integer userId);
+    boolean deleteImage(Long id, Long userId);
 
     /**
      * 获取用户的图片列表
      * @param userId 用户ID
      * @return 图片列表
      */
-    List<Image> getUserImages(Integer userId);
+    List<Image> getUserImages(Long userId);
 
     /**
      * 获取Markdown文件关联的图片
      * @param markdownId Markdown文件ID
      * @return 图片列表
      */
-    List<Image> getMarkdownImages(Integer markdownId);
-}
+    List<Image> getMarkdownImages(Long markdownId);
+}

biji-houdaun/src/main/java/com/test/bijihoudaun/service/MarkdownFileService.java

@@ -14,7 +14,7 @@ public interface MarkdownFileService extends IService<MarkdownFile> {
      * @param content 文件内容
      * @return 创建的文件对象
      */
-    MarkdownFile createMarkdownFile(Integer userId, String title, String fileName, String content);
+    MarkdownFile createMarkdownFile(Long userId, String title, String fileName, String content);
 
     /**
      * 更新Markdown内容
@@ -22,12 +22,19 @@ public interface MarkdownFileService extends IService<MarkdownFile> {
      * @param content 新内容
      * @return 更新后的文件对象
      */
-    MarkdownFile updateMarkdownContent(Integer id, String content);
+    MarkdownFile updateMarkdownContent(Long id, String content);
+    
+    /**
+     * 根据ID获取Markdown文件
+     * @param id 文件ID
+     * @return Markdown文件对象
+     */
+    MarkdownFile getMarkdownById(Long id);
 
     /**
      * 获取用户的所有Markdown文件
      * @param userId 用户ID
      * @return 文件列表
      */
-    List<MarkdownFile> getUserFiles(Integer userId);
-}
+    List<MarkdownFile> getUserFiles(Long userId);
+}

biji-houdaun/src/main/java/com/test/bijihoudaun/service/impl/ImageServiceImpl.java

@@ -27,7 +27,7 @@ public class ImageServiceImpl
     private String uploadDir;
 
     @Override
-    public Image uploadImage(Integer userId, Integer markdownId, MultipartFile file) throws IOException {
+    public Image uploadImage(Long userId, Long markdownId, MultipartFile file) throws IOException {
         // 创建上传目录
         Path uploadPath = Paths.get(uploadDir);
         if (!Files.exists(uploadPath)) {
@@ -50,7 +50,7 @@ public class ImageServiceImpl
         image.setOriginalName(originalFilename);
         image.setStoredName(storedName);
         image.setUrl("/uploads/" + storedName);
-        image.setSize((int) file.getSize());
+        image.setSize(file.getSize());
         image.setContentType(file.getContentType());
         image.setCreatedAt(LocalDateTime.now());
 
@@ -59,7 +59,7 @@ public class ImageServiceImpl
     }
 
     @Override
-    public boolean deleteImage(Integer id, Integer userId) {
+    public boolean deleteImage(Long id, Long userId) {
         QueryWrapper<Image> queryWrapper = new QueryWrapper<>();
         queryWrapper.eq("id", id)
                 .eq("user_id", userId);
@@ -83,7 +83,7 @@ public class ImageServiceImpl
     }
 
     @Override
-    public List<Image> getUserImages(Integer userId) {
+    public List<Image> getUserImages(Long userId) {
         QueryWrapper<Image> queryWrapper = new QueryWrapper<>();
         queryWrapper.eq("user_id", userId)
                 .orderByDesc("created_at");
@@ -91,10 +91,10 @@ public class ImageServiceImpl
     }
 
     @Override
-    public List<Image> getMarkdownImages(Integer markdownId) {
+    public List<Image> getMarkdownImages(Long markdownId) {
         QueryWrapper<Image> queryWrapper = new QueryWrapper<>();
         queryWrapper.eq("markdown_id", markdownId)
                 .orderByDesc("created_at");
         return this.list(queryWrapper);
     }
-}
+}

biji-houdaun/src/main/java/com/test/bijihoudaun/service/impl/MarkdownFileServiceImpl.java

@@ -6,6 +6,7 @@ import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.test.bijihoudaun.entity.MarkdownFile;
 import com.test.bijihoudaun.mapper.MarkdownFileMapper;
 import com.test.bijihoudaun.service.MarkdownFileService;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.time.LocalDateTime;
@@ -17,7 +18,7 @@ public class MarkdownFileServiceImpl
         implements MarkdownFileService {
 
     @Override
-    public MarkdownFile createMarkdownFile(Integer userId, String title, String fileName, String content) {
+    public MarkdownFile createMarkdownFile(Long userId, String title, String fileName, String content) {
         MarkdownFile file = new MarkdownFile();
         file.setUserId(userId);
         file.setTitle(title);
@@ -31,7 +32,7 @@ public class MarkdownFileServiceImpl
     }
 
     @Override
-    public MarkdownFile updateMarkdownContent(Integer id, String content) {
+    public MarkdownFile updateMarkdownContent(Long id, String content) {
         MarkdownFile file = this.getById(id);
         if (file != null) {
             file.setContent(content);
@@ -40,12 +41,17 @@ public class MarkdownFileServiceImpl
         }
         return file;
     }
+    
+    @Override
+    public MarkdownFile getMarkdownById(Long id) {
+        return this.getById(id);
+    }
 
     @Override
-    public List<MarkdownFile> getUserFiles(Integer userId) {
+    public List<MarkdownFile> getUserFiles(Long userId) {
         QueryWrapper<MarkdownFile> queryWrapper = new QueryWrapper<>();
         queryWrapper.eq("user_id", userId)
                 .orderByDesc("updated_at");
         return this.list(queryWrapper);
     }
-}
+}