8/7,ybb文件夹和文件都实现了记录Id功能。

core/pom.xml

@@ -161,6 +161,13 @@
             <artifactId>opencv</artifactId>
             <version>4.7.0-0</version>
         </dependency>
+
+
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.11.0</version>
+        </dependency>
     </dependencies>
 
     <build>

core/src/main/java/com/dite/znpt/domain/entity/BusinessDataFileEntity.java

@@ -33,5 +33,7 @@ public class BusinessDataFileEntity {
     private String uploaderId = null;
     //是否删除
     private Boolean isDeleted = false;
+//    //有效日期
+//    private Date validDate = null;
 
 }

core/src/main/java/com/dite/znpt/mapper/BusinessDataFileMapper.java

@@ -11,6 +11,10 @@ import java.util.List;
 
 @ApiOperation("商务资料文件对象")
 public interface BusinessDataFileMapper {
+
+    // 新增文件预览方法
+
+
     public List<BusinessDataFileEntity> List(@Param("folderId") Long folderId, @Param("fileName") String fileName);
     void delete(@Param("fileId") Long fileId,@Param("folderId") Long folderId);
 

core/src/main/java/com/dite/znpt/mapper/BusinessDataMapper.java

@@ -4,9 +4,9 @@ import com.baomidou.mybatisplus.core.injector.methods.SelectList;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.dite.znpt.domain.entity.BusinessDataEntity;
 import io.swagger.annotations.ApiOperation;
+import org.apache.ibatis.annotations.Mapper;
 import org.apache.ibatis.annotations.Param;
 import org.apache.ibatis.annotations.Select;
-import com.dite.znpt.domain.entity.BusinessDataEntity;
 
 import java.time.LocalDateTime;
 import java.util.List;
@@ -16,7 +16,8 @@ import java.util.List;
 
 
 @ApiOperation("商务资料文件夹对象")
-public interface BusinessDataMapper   {
+@Mapper
+public interface BusinessDataMapper {
     public String getPath(Long parentId);
 
     public List<BusinessDataEntity> List();

core/src/main/java/com/dite/znpt/service/BusinessDataFileService.java

@@ -36,6 +36,6 @@ public interface BusinessDataFileService {
     @ApiOperation("上传文件")
     Result addfile(MultipartFile file, Long folderId);
 
-    // 在接口中添加预览方法
+    @ApiOperation("预览文件")
-//    Result preview(Long fileId, HttpServletResponse response);
+    Result preview(Long fileId, HttpServletResponse response);
 }

core/src/main/java/com/dite/znpt/service/impl/BusinessDataFileServiceImpl.java

@@ -1,7 +1,22 @@
 package com.dite.znpt.service.impl;
 
 
-
+import javax.servlet.http.HttpServletResponse;
+import java.io.FileInputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import org.springframework.util.MimeTypeUtils;
+import org.springframework.http.MediaType;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import java.util.Base64;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+//
 import cn.dev33.satoken.stp.StpUtil;
 import com.dite.znpt.domain.Result;
 import com.dite.znpt.domain.entity.BusinessDataFileEntity;
@@ -82,8 +97,6 @@ public class BusinessDataFileServiceImpl implements BusinessDataFileService {
                 return Result.okM("删除成功");
             }
         }
-
-
     }
 
     @ApiOperation("增加文件")
@@ -239,4 +252,231 @@ public class BusinessDataFileServiceImpl implements BusinessDataFileService {
             return Result.error("上传失败");
         }
     }
+
+
+    @ApiOperation("文件预览")
+    public Result preview(Long fileId, HttpServletResponse response) {
+        try {
+            // 获取文件路径
+            String filePath = businessDataFileMapper.getPath(fileId);
+            if (filePath == null || filePath.isEmpty()) {
+                return Result.error("文件不存在");
+            }
+
+            File file = new File(filePath);
+            if (!file.exists()) {
+                return Result.error("文件不存在");
+            }
+
+            // 获取文件扩展名
+            String extension = getFileExtension(filePath);
+
+            // 根据文件类型处理预览
+            switch (extension) {
+                case "pdf":
+                    return previewPdf(file, response);
+                case "jpg":
+                case "jpeg":
+                case "png":
+                case "gif":
+                case "bmp":
+                case "webp":
+                    return previewImage(file, response);
+                case "txt":
+                case "md":
+                case "log":
+                    return previewText(file, response);
+                case "doc":
+                case "docx":
+                case "xls":
+                case "xlsx":
+                case "ppt":
+                case "pptx":
+                    return previewOffice(file, response);
+                case "mp4":
+                case "avi":
+                case "mov":
+                case "wmv":
+                case "flv":
+                    return previewVideo(file, response);
+                case "mp3":
+                case "wav":
+                case "flac":
+                case "aac":
+                    return previewAudio(file, response);
+                default:
+                    return Result.error("暂不支持该文件类型的预览");
+            }
+        } catch (Exception e) {
+            return Result.error("文件预览失败: " + e.getMessage());
+        }
+    }
+
+    private String getFileExtension(String fileName) {
+        if (fileName == null || fileName.isEmpty()) {
+            return "";
+        }
+        int lastDotIndex = fileName.lastIndexOf('.');
+        if (lastDotIndex == -1) {
+            return "";
+        }
+        return fileName.substring(lastDotIndex + 1).toLowerCase();
+    }
+
+    private Result previewPdf(File file, HttpServletResponse response) {
+        try {
+            response.setContentType("application/pdf");
+            response.setHeader("Content-Disposition", "inline; filename=" + file.getName());
+
+            try (FileInputStream fis = new FileInputStream(file);
+                 OutputStream os = response.getOutputStream()) {
+                byte[] buffer = new byte[1024];
+                int bytesRead;
+                while ((bytesRead = fis.read(buffer)) != -1) {
+                    os.write(buffer, 0, bytesRead);
+                }
+            }
+            return Result.ok("PDF预览成功");
+        } catch (Exception e) {
+            return Result.error("PDF预览失败: " + e.getMessage());
+        }
+    }
+
+    private Result previewImage(File file, HttpServletResponse response) {
+        try {
+            String contentType = getImageContentType(file.getName());
+            response.setContentType(contentType);
+            response.setHeader("Content-Disposition", "inline; filename=" + file.getName());
+
+            try (FileInputStream fis = new FileInputStream(file);
+                 OutputStream os = response.getOutputStream()) {
+                byte[] buffer = new byte[1024];
+                int bytesRead;
+                while ((bytesRead = fis.read(buffer)) != -1) {
+                    os.write(buffer, 0, bytesRead);
+                }
+            }
+            return Result.ok("图片预览成功");
+        } catch (Exception e) {
+            return Result.error("图片预览失败: " + e.getMessage());
+        }
+    }
+
+    private Result previewText(File file, HttpServletResponse response) {
+        try {
+            response.setContentType("text/plain; charset=UTF-8");
+            response.setHeader("Content-Disposition", "inline; filename=" + file.getName());
+
+            try (FileInputStream fis = new FileInputStream(file);
+                 OutputStream os = response.getOutputStream()) {
+                byte[] buffer = new byte[1024];
+                int bytesRead;
+                while ((bytesRead = fis.read(buffer)) != -1) {
+                    os.write(buffer, 0, bytesRead);
+                }
+            }
+            return Result.ok("文本预览成功");
+        } catch (Exception e) {
+            return Result.error("文本预览失败: " + e.getMessage());
+        }
+    }
+
+    private Result previewOffice(File file, HttpServletResponse response) {
+        // Office文件预览比较复杂，这里返回提示信息
+        return Result.error("Office文件预览功能暂未实现，请下载后查看");
+    }
+
+    private Result previewVideo(File file, HttpServletResponse response) {
+        try {
+            String contentType = getVideoContentType(file.getName());
+            response.setContentType(contentType);
+            response.setHeader("Content-Disposition", "inline; filename=" + file.getName());
+
+            try (FileInputStream fis = new FileInputStream(file);
+                 OutputStream os = response.getOutputStream()) {
+                byte[] buffer = new byte[1024];
+                int bytesRead;
+                while ((bytesRead = fis.read(buffer)) != -1) {
+                    os.write(buffer, 0, bytesRead);
+                }
+            }
+            return Result.ok("视频预览成功");
+        } catch (Exception e) {
+            return Result.error("视频预览失败: " + e.getMessage());
+        }
+    }
+
+    private Result previewAudio(File file, HttpServletResponse response) {
+        try {
+            String contentType = getAudioContentType(file.getName());
+            response.setContentType(contentType);
+            response.setHeader("Content-Disposition", "inline; filename=" + file.getName());
+
+            try (FileInputStream fis = new FileInputStream(file);
+                 OutputStream os = response.getOutputStream()) {
+                byte[] buffer = new byte[1024];
+                int bytesRead;
+                while ((bytesRead = fis.read(buffer)) != -1) {
+                    os.write(buffer, 0, bytesRead);
+                }
+            }
+            return Result.ok("音频预览成功");
+        } catch (Exception e) {
+            return Result.error("音频预览失败: " + e.getMessage());
+        }
+    }
+
+    private String getImageContentType(String fileName) {
+        String extension = getFileExtension(fileName);
+        switch (extension) {
+            case "jpg":
+            case "jpeg":
+                return "image/jpeg";
+            case "png":
+                return "image/png";
+            case "gif":
+                return "image/gif";
+            case "bmp":
+                return "image/bmp";
+            case "webp":
+                return "image/webp";
+            default:
+                return "application/octet-stream";
+        }
+    }
+
+    private String getVideoContentType(String fileName) {
+        String extension = getFileExtension(fileName);
+        switch (extension) {
+            case "mp4":
+                return "video/mp4";
+            case "avi":
+                return "video/x-msvideo";
+            case "mov":
+                return "video/quicktime";
+            case "wmv":
+                return "video/x-ms-wmv";
+            case "flv":
+                return "video/x-flv";
+            default:
+                return "application/octet-stream";
+        }
+    }
+
+    private String getAudioContentType(String fileName) {
+        String extension = getFileExtension(fileName);
+        switch (extension) {
+            case "mp3":
+                return "audio/mpeg";
+            case "wav":
+                return "audio/wav";
+            case "flac":
+                return "audio/flac";
+            case "aac":
+                return "audio/aac";
+            default:
+                return "application/octet-stream";
+        }
+    }
+
 }

web/src/main/java/com/dite/znpt/web/controller/BusinessDataFileController.java

@@ -27,6 +27,7 @@ import org.springframework.web.multipart.MultipartFile;
 
 /*
  * @Description: 商务资料管理，文件夹层
+ * 袁彬彬写的，其他人合并的时候，不允许改我的部分。
  */
 
 @Api(tags = "文件接口")
@@ -78,4 +79,10 @@ public class BusinessDataFileController {
         return businessDataFileService.reName(fileId, newFileName);
     }
 
+    @ApiOperation(value = "文件预览")
+    @GetMapping("/preview")
+    public Result preview(@RequestParam("fileId") Long fileId, HttpServletResponse response) {
+        return businessDataFileService.preview(fileId, response);
+    }
+
 }

web/src/main/resources/application.yml

@@ -10,9 +10,9 @@ spring:
   servlet:
     multipart:
       # 单个文件大小
-      max-file-size: 100MB
+      max-file-size: 1000MB
       # 设置总上传的文件大小
-      max-request-size: 200MB
+      max-request-size: 2000MB
   application:
     name: znpt
   mvc:
@@ -27,4 +27,4 @@ flowable:
   # true 会对数据库中所有表进行更新操作。如果表不存在，则自动创建(建议开发时使用)
   database-schema-update: false
   # 关闭定时任务JOB
-  async-executor-activate: false
+  async-executor-activate: false