代码提交

bonus-admin/src/main/java/com/bonus/web/controller/archive/FileManagementController.java

@@ -6,7 +6,12 @@ import com.bonus.common.core.controller.BaseController;
 import com.bonus.common.core.domain.R;
 import com.bonus.common.core.page.TableDataInfo;
 import com.bonus.common.enums.OperaType;
+import com.bonus.common.utils.SecurityUtils;
+import com.bonus.common.utils.bean.FileDto;
+import com.bonus.common.utils.file.FileUploadUtils;
+import com.bonus.common.utils.file.FileUtils;
 import com.bonus.web.domain.DaKyProFilesContentsDto;
+import com.bonus.web.domain.FilesClassifyNameStandardDto;
 import com.bonus.web.domain.ProjectDto;
 import com.bonus.web.domain.vo.DaKyProFilesContentsVo;
 import com.bonus.web.mapper.FileManageMapper;
@@ -17,10 +22,13 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
 
 import java.util.ArrayList;
 import java.util.List;
 
+import static com.bonus.common.utils.SecurityUtils.getLoginUser;
+
 /**
  * @Author：liang.chao
  * @Date：2025/9/11 - 13:29
@@ -107,7 +115,7 @@ public class FileManagementController extends BaseController {
     @PostMapping("addFileManageRight")
     @SysLog(title = "新增右侧档案树", module = "档案管理->档案目录管理", businessType = OperaType.INSERT, details = "新增右侧档案树", logType = 1)
     @RequiresPermissions("file:manage:add")
-    public R saveArchivalCatalogue(@ModelAttribute @Validated DaKyProFilesContentsVo dto) {
+    public R saveArchivalCatalogue(@ModelAttribute @Validated DaKyProFilesContentsVo dto, @RequestParam("file") MultipartFile file) {
         try {
             if (dto.getParentId() == null) {
                 return R.fail("父级有误");
@@ -115,6 +123,35 @@ public class FileManagementController extends BaseController {
             if (dto.getLevel() == null) {
                 return R.fail("级别有误");
             }
+            // 查询档案名称是否重复
+            Integer i = fileManageMapper.selectFileManage(dto);
+            if (i > 0) {
+                return R.fail("档案名称重复");
+            }
+            if (file != null && !file.isEmpty()) {
+                // 判断是否包含文件命名规范
+                List<FilesClassifyNameStandardDto> list = fileManageMapper.getFilesClassifyNameStandard();
+                for (FilesClassifyNameStandardDto s : list) {
+                    if (s.getStandardType().equals("1") && !file.getOriginalFilename().contains(s.getStandardName())) {
+                        return R.fail("文件命名需包含" + s.getStandardName());
+                    } else if (s.getStandardType().equals("0") && file.getOriginalFilename().contains(s.getStandardName())) {
+                        return R.fail("文件命名不能包含" + s.getStandardName());
+                    }
+                }
+                FileDto upload = FileUtils.upload(file);
+                dto.setFilePath(upload.getFilePath());
+                dto.setFileSize(upload.getFileSize());
+                dto.setFileName(upload.getFileName());
+                dto.setFileType(upload.getFileType());
+                dto.setSuffixName(upload.getSuffixName());
+                dto.setUpdateUserId(getLoginUser().getUserId());
+                dto.setUpdateUserName(getLoginUser().getUsername());
+                dto.setCreateUserId(getLoginUser().getUserId());
+                dto.setCreateUserName(getLoginUser().getUsername());
+                fileManageMapper.saveFileSource(dto);
+            } else if (file == null || file.isEmpty()) {
+                return R.fail("请上传文件");
+            }
             return fileManageService.saveFileManage(dto);
         } catch (Exception e) {
             log.error(e.toString(), e);
@@ -152,8 +189,32 @@ public class FileManagementController extends BaseController {
     @PostMapping("updateFileManageRight")
     @SysLog(title = "修改档案", module = "档案管理->档案目录管理", businessType = OperaType.UPDATE, details = "修改档案", logType = 1)
     @RequiresPermissions("file:manage:update")
-    public R updateFileManage(@ModelAttribute @Validated DaKyProFilesContentsVo dto) {
+    public R updateFileManage(@ModelAttribute @Validated DaKyProFilesContentsVo dto, @RequestParam("file") MultipartFile file) {
         try {
+            dto.setUpdateUserId(getLoginUser().getUserId());
+            dto.setUpdateUserName(getLoginUser().getUsername());
+            Integer i = fileManageMapper.selectFileManage(dto);
+            if (i > 0) {
+                return R.fail("档案名称重复");
+            }
+            if (file != null && !file.isEmpty()) {
+                // 判断是否包含文件命名规范
+                List<FilesClassifyNameStandardDto> list = fileManageMapper.getFilesClassifyNameStandard();
+                for (FilesClassifyNameStandardDto s : list) {
+                    if (s.getStandardType().equals("1") && !file.getOriginalFilename().contains(s.getStandardName())) {
+                        return R.fail("文件命名需包含" + s.getStandardName());
+                    } else if (s.getStandardType().equals("0") && file.getOriginalFilename().contains(s.getStandardName())) {
+                        return R.fail("文件命名不能包含" + s.getStandardName());
+                    }
+                }
+                FileDto upload = FileUtils.upload(file);
+                dto.setFilePath(upload.getFilePath());
+                dto.setFileSize(upload.getFileSize());
+                dto.setFileName(upload.getFileName());
+                dto.setFileType(upload.getFileType());
+                dto.setSuffixName(upload.getSuffixName());
+                fileManageMapper.updateFileSource(dto);
+            }
             return fileManageService.updateFileManage(dto);
         } catch (Exception e) {
             log.error(e.toString(), e);

bonus-admin/src/main/java/com/bonus/web/domain/DaKyProFilesContentsDto.java

@@ -125,6 +125,10 @@ public class DaKyProFilesContentsDto {
      * 文件名称
      */
     private String fileName;
+    /**
+     * 文件大小
+     */
+    private String fileSize;
     /**
      * 文件类型
      */

bonus-admin/src/main/java/com/bonus/web/domain/vo/DaKyProFilesContentsVo.java

@@ -127,6 +127,15 @@ public class DaKyProFilesContentsVo {
      * 文件类型
      */
     private String fileType;
+    /**
+     * 文件大小
+     */
+    private String fileSize;
+
+    /**
+     * 文件后缀名
+     */
+    private String suffixName;
     /**
      * 资源类型
      */

bonus-admin/src/main/java/com/bonus/web/mapper/FileManageMapper.java

@@ -1,6 +1,7 @@
 package com.bonus.web.mapper;
 
 import com.bonus.web.domain.DaKyProFilesContentsDto;
+import com.bonus.web.domain.FilesClassifyNameStandardDto;
 import com.bonus.web.domain.vo.DaKyProFilesContentsVo;
 import org.apache.ibatis.annotations.Mapper;
 
@@ -24,7 +25,6 @@ public interface FileManageMapper {
     Integer updateFileManage(DaKyProFilesContentsDto dto);
     Integer updateFileManage(DaKyProFilesContentsVo dto);
 
-    Integer updateFileSource(DaKyProFilesContentsDto dto);
     Integer updateFileSource(DaKyProFilesContentsVo dto);
 
     Integer delFileSource(DaKyProFilesContentsDto dto);
@@ -34,7 +34,7 @@ public interface FileManageMapper {
     Integer selectFileManage(DaKyProFilesContentsDto dto);
     Integer selectFileManage(DaKyProFilesContentsVo dto);
 
-    List<String> getFilesClassifyNameStandard();
+    List<FilesClassifyNameStandardDto> getFilesClassifyNameStandard();
 
     Integer updateIntegrityStatus(DaKyProFilesContentsDto dto);
 

bonus-admin/src/main/java/com/bonus/web/service/impl/FileManageServiceImpl.java

@@ -64,25 +64,6 @@ public class FileManageServiceImpl implements FileManageService {
 
     @Override
     public R saveFileManage(DaKyProFilesContentsVo dto) {
-        // 查询档案名称是否重复
-        Integer i = fileManageMapper.selectFileManage(dto);
-        if (i > 0) {
-            return R.fail("档案名称重复");
-        }
-        dto.setCreateUserId(getLoginUser().getUserId());
-        dto.setCreateUserName(getLoginUser().getUsername());
-        dto.setUpdateUserId(SecurityUtils.getLoginUser().getUserId());
-        dto.setUpdateUserName(SecurityUtils.getLoginUser().getUsername());
-        if (StringUtils.isNotBlank(dto.getFilePath())) {
-            // 判断是否包含文件命名规范
-            List<String> list = fileManageMapper.getFilesClassifyNameStandard();
-            for (String s : list) {
-                if (!dto.getFilePath().contains(s)) {
-                    return R.fail("文件命名不符合规范");
-                }
-            }
-            fileManageMapper.saveFileSource(dto);
-        }
         String uuid32 = UUID.randomUUID().toString().replace("-", "").toLowerCase();
         dto.setId(uuid32);
         return R.ok(fileManageMapper.saveFileManage(dto));
@@ -101,16 +82,6 @@ public class FileManageServiceImpl implements FileManageService {
 
     @Override
     public R updateFileManage(DaKyProFilesContentsVo dto) {
-        dto.setUpdateUserId(getLoginUser().getUserId());
-        dto.setUpdateUserName(getLoginUser().getUsername());
-        Integer i = fileManageMapper.selectFileManage(dto);
-        if (i > 0) {
-            return R.fail("档案名称重复");
-        }
-        fileManageMapper.updateFileSource(dto);
-        if (StringUtils.isBlank(dto.getFilePath())) {
-            dto.setId(null);
-        }
         return R.ok(fileManageMapper.updateFileManage(dto));
     }
 

bonus-admin/src/main/resources/mapper/FileManageMapper.xml

@@ -99,6 +99,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 			source_file_name = #{sourceFileName},
 			file_name = #{fileName},
 			file_type = #{fileType},
+			file_size = #{fileSize},
 			source_type = #{sourceType},
 			update_user_id = #{updateUserId},
 			update_user_name = #{updateUserName},
@@ -177,14 +178,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 			and id != #{id}
 		</if>
 	</select>
-	<select id="getFilesClassifyNameStandard" resultType="java.lang.String">
+
-		SELECT
-			dkfcns.standard_name
-		FROM
-			da_ky_files_classify_name_standard dkfcns
-		WHERE
-			dkfcns.del_flag = '1' and standard_type = '1'
-	</select>
 	<select id="getMaxSort" resultType="java.lang.Integer">
 		SELECT
 			max(dkpfc.sort)
@@ -210,4 +204,13 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 		WHERE
 			dkpfc.id = #{id}
 	</select>
+	<select id="getFilesClassifyNameStandard" resultType="com.bonus.web.domain.FilesClassifyNameStandardDto">
+		SELECT
+			dkfcns.standard_name AS standardName,
+			dkfcns.standard_type AS standardType
+		FROM
+			da_ky_files_classify_name_standard dkfcns
+		WHERE
+			dkfcns.del_flag = '1'
+	</select>
 </mapper>

bonus-admin/src/main/resources/mapper/FilesClassifyNameStandardMapper.xml

@@ -51,7 +51,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	<select id="getClassifyNameStandardList" resultType="com.bonus.web.domain.FilesClassifyNameStandardDto">
 		SELECT
 			dkfcns.id,
-			dkfcns.standard_type AS standardType,
+			dksdd.dict_label AS standardType,
 			dkfcns.standard_name AS standardName,
 			dkfcns.remark,
 			dkfcns.create_time AS createTime,

bonus-common/src/main/java/com/bonus/common/utils/bean/FileDto.java

@@ -0,0 +1,21 @@
+package com.bonus.common.utils.bean;
+
+import lombok.Data;
+
+/**
+ * @Author：liang.chao
+ * @Date：2025/9/17 - 13:56
+ */
+@Data
+public class FileDto {
+    // 文件名称
+    private String fileName;
+    // 文件路径
+    private String filePath;
+    // 文件大小
+    private String fileSize;
+    // 文件类型 1.图片  2.文件
+    private String fileType;
+    // 文件后缀名
+    private String suffixName;
+}

bonus-common/src/main/java/com/bonus/common/utils/file/FileUtils.java

@@ -9,8 +9,15 @@ import java.io.OutputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+
+import com.bonus.common.core.domain.R;
+import com.bonus.common.utils.bean.FileDto;
 import org.apache.commons.io.FilenameUtils;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.ArrayUtils;
@@ -19,47 +26,61 @@ import com.bonus.common.constant.Constants;
 import com.bonus.common.utils.DateUtils;
 import com.bonus.common.utils.StringUtils;
 import com.bonus.common.utils.uuid.IdUtils;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.web.multipart.MultipartFile;
 
 /**
  * 文件处理工具类
- * 
+ *
  * @author bonus
  */
-public class FileUtils
+public class FileUtils {
-{
     public static String FILENAME_PATTERN = "[a-zA-Z0-9_\\-\\|\\.\\u4e00-\\u9fa5]+";
+    // 常见的图片扩展名（小写）
+    // 常见的图片扩展名（小写）
+    private static final Set<String> IMAGE_EXTENSIONS;
+
+    static {
+        HashSet<String> set = new HashSet<>();
+        set.add("jpg");
+        set.add("jpeg");
+        set.add("png");
+        set.add("gif");
+        set.add("bmp");
+        set.add("webp");
+        set.add("tiff");
+        set.add("svg");
+        set.add("ico");
+        IMAGE_EXTENSIONS = Collections.unmodifiableSet(set);
+    }
+
+
+    @Value("${bonus.profile}")
+    private static String uploadDir;
 
     /**
      * 输出指定文件的byte数组
-     * 
+     *
      * @param filePath 文件路径
-     * @param os 输出流
+     * @param os       输出流
      * @return
      */
-    public static void writeBytes(String filePath, OutputStream os) throws IOException
+    public static void writeBytes(String filePath, OutputStream os) throws IOException {
-    {
         FileInputStream fis = null;
-        try
+        try {
-        {
             File file = new File(filePath);
-            if (!file.exists())
+            if (!file.exists()) {
-            {
                 throw new FileNotFoundException(filePath);
             }
             fis = new FileInputStream(file);
             byte[] b = new byte[1024];
             int length;
-            while ((length = fis.read(b)) > 0)
+            while ((length = fis.read(b)) > 0) {
-            {
                 os.write(b, 0, length);
             }
-        }
+        } catch (IOException e) {
-        catch (IOException e)
-        {
             throw e;
-        }
+        } finally {
-        finally
-        {
             IOUtils.close(os);
             IOUtils.close(fis);
         }
@@ -72,33 +93,28 @@ public class FileUtils
      * @return 目标文件
      * @throws IOException IO异常
      */
-    public static String writeImportBytes(byte[] data) throws IOException
+    public static String writeImportBytes(byte[] data) throws IOException {
-    {
         return writeBytes(data, BonusConfig.getImportPath());
     }
 
     /**
      * 写数据到文件中
      *
-     * @param data 数据
+     * @param data      数据
      * @param uploadDir 目标文件
      * @return 目标文件
      * @throws IOException IO异常
      */
-    public static String writeBytes(byte[] data, String uploadDir) throws IOException
+    public static String writeBytes(byte[] data, String uploadDir) throws IOException {
-    {
         FileOutputStream fos = null;
         String pathName = "";
-        try
+        try {
-        {
             String extension = getFileExtendName(data);
             pathName = DateUtils.datePath() + "/" + IdUtils.fastUUID() + "." + extension;
             File file = FileUploadUtils.getAbsoluteFile(uploadDir, pathName);
             fos = new FileOutputStream(file);
             fos.write(data);
-        }
+        } finally {
-        finally
-        {
             IOUtils.close(fos);
         }
         return FileUploadUtils.getPathFileName(uploadDir, pathName);
@@ -106,28 +122,25 @@ public class FileUtils
 
     /**
      * 移除路径中的请求前缀片段
-     * 
+     *
      * @param filePath 文件路径
      * @return 移除后的文件路径
      */
-    public static String stripPrefix(String filePath)
+    public static String stripPrefix(String filePath) {
-    {
         return StringUtils.substringAfter(filePath, Constants.RESOURCE_PREFIX);
     }
 
     /**
      * 删除文件
-     * 
+     *
      * @param filePath 文件
      * @return
      */
-    public static boolean deleteFile(String filePath)
+    public static boolean deleteFile(String filePath) {
-    {
         boolean flag = false;
         File file = new File(filePath);
         // 路径为文件且不为空则进行删除
-        if (file.isFile() && file.exists())
+        if (file.isFile() && file.exists()) {
-        {
             flag = file.delete();
         }
         return flag;
@@ -135,32 +148,28 @@ public class FileUtils
 
     /**
      * 文件名称验证
-     * 
+     *
      * @param filename 文件名称
      * @return true 正常 false 非法
      */
-    public static boolean isValidFilename(String filename)
+    public static boolean isValidFilename(String filename) {
-    {
         return filename.matches(FILENAME_PATTERN);
     }
 
     /**
      * 检查文件是否可下载
-     * 
+     *
      * @param resource 需要下载的文件
      * @return true 正常 false 非法
      */
-    public static boolean checkAllowDownload(String resource)
+    public static boolean checkAllowDownload(String resource) {
-    {
         // 禁止目录上跳级别
-        if (StringUtils.contains(resource, ".."))
+        if (StringUtils.contains(resource, "..")) {
-        {
             return false;
         }
 
         // 检查允许下载的文件规则
-        if (ArrayUtils.contains(MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION, FileTypeUtils.getFileType(resource)))
+        if (ArrayUtils.contains(MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION, FileTypeUtils.getFileType(resource))) {
-        {
             return true;
         }
 
@@ -170,33 +179,25 @@ public class FileUtils
 
     /**
      * 下载文件名重新编码
-     * 
+     *
-     * @param request 请求对象
+     * @param request  请求对象
      * @param fileName 文件名
      * @return 编码后的文件名
      */
-    public static String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException
+    public static String setFileDownloadHeader(HttpServletRequest request, String fileName) throws UnsupportedEncodingException {
-    {
         final String agent = request.getHeader("USER-AGENT");
         String filename = fileName;
-        if (agent.contains("MSIE"))
+        if (agent.contains("MSIE")) {
-        {
             // IE浏览器
             filename = URLEncoder.encode(filename, "utf-8");
             filename = filename.replace("+", " ");
-        }
+        } else if (agent.contains("Firefox")) {
-        else if (agent.contains("Firefox"))
-        {
             // 火狐浏览器
             filename = new String(fileName.getBytes(), "ISO8859-1");
-        }
+        } else if (agent.contains("Chrome")) {
-        else if (agent.contains("Chrome"))
-        {
             // google浏览器
             filename = URLEncoder.encode(filename, "utf-8");
-        }
+        } else {
-        else
-        {
             // 其它浏览器
             filename = URLEncoder.encode(filename, "utf-8");
         }
@@ -206,11 +207,10 @@ public class FileUtils
     /**
      * 下载文件名重新编码
      *
-     * @param response 响应对象
+     * @param response     响应对象
      * @param realFileName 真实文件名
      */
-    public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException
+    public static void setAttachmentResponseHeader(HttpServletResponse response, String realFileName) throws UnsupportedEncodingException {
-    {
         String percentEncodedFileName = percentEncode(realFileName);
 
         StringBuilder contentDispositionValue = new StringBuilder();
@@ -232,36 +232,27 @@ public class FileUtils
      * @param s 需要百分号编码的字符串
      * @return 百分号编码后的字符串
      */
-    public static String percentEncode(String s) throws UnsupportedEncodingException
+    public static String percentEncode(String s) throws UnsupportedEncodingException {
-    {
         String encode = URLEncoder.encode(s, StandardCharsets.UTF_8.toString());
         return encode.replaceAll("\\+", "%20");
     }
 
     /**
      * 获取图像后缀
-     * 
+     *
      * @param photoByte 图像数据
      * @return 后缀名
      */
-    public static String getFileExtendName(byte[] photoByte)
+    public static String getFileExtendName(byte[] photoByte) {
-    {
         String strFileExtendName = "jpg";
         if ((photoByte[0] == 71) && (photoByte[1] == 73) && (photoByte[2] == 70) && (photoByte[3] == 56)
-                && ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97))
+                && ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97)) {
-        {
             strFileExtendName = "gif";
-        }
+        } else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70)) {
-        else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70))
-        {
             strFileExtendName = "jpg";
-        }
+        } else if ((photoByte[0] == 66) && (photoByte[1] == 77)) {
-        else if ((photoByte[0] == 66) && (photoByte[1] == 77))
-        {
             strFileExtendName = "bmp";
-        }
+        } else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71)) {
-        else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71))
-        {
             strFileExtendName = "png";
         }
         return strFileExtendName;
@@ -269,14 +260,12 @@ public class FileUtils
 
     /**
      * 获取文件名称 /profile/upload/2022/04/16/bonus.png -- bonus.png
-     * 
+     *
      * @param fileName 路径名称
      * @return 没有文件路径的名称
      */
-    public static String getName(String fileName)
+    public static String getName(String fileName) {
-    {
+        if (fileName == null) {
-        if (fileName == null)
-        {
             return null;
         }
         int lastUnixPos = fileName.lastIndexOf('/');
@@ -287,17 +276,59 @@ public class FileUtils
 
     /**
      * 获取不带后缀文件名称 /profile/upload/2022/04/16/bonus.png -- bonus
-     * 
+     *
      * @param fileName 路径名称
      * @return 没有文件路径和后缀的名称
      */
-    public static String getNameNotSuffix(String fileName)
+    public static String getNameNotSuffix(String fileName) {
-    {
+        if (fileName == null) {
-        if (fileName == null)
-        {
             return null;
         }
         String baseName = FilenameUtils.getBaseName(fileName);
         return baseName;
     }
+
+    public static final FileDto upload(MultipartFile file) throws IOException {
+        FileDto bean = new FileDto();
+        if (file != null && !file.isEmpty()) {
+            // 验证文件类型
+            String originalFileName = file.getOriginalFilename();
+            String fileExtension = originalFileName != null ? originalFileName.split("\\.")[1] : "";
+            if (isImage(fileExtension)) {
+                bean.setFileType("1");
+            } else {
+                bean.setFileType("2");
+            }
+            File targetDir = new File(uploadDir);
+            if (!targetDir.exists()) {
+                targetDir.mkdirs();
+            }
+            String fileName = System.currentTimeMillis() + "_" + file.getOriginalFilename();
+            File targetFile = new File(uploadDir, fileName);
+            file.transferTo(targetFile);
+            String pathName = targetFile.getAbsolutePath();
+            bean.setFilePath(pathName);
+            bean.setFileName(fileName);
+            bean.setFileSize(file.getSize() + "");
+            bean.setSuffixName(fileExtension);
+            return bean;
+        } else {
+            return bean;
+        }
+
+    }
+
+    /**
+     * 根据文件扩展名判断是否为图片
+     *
+     * @param fileExtension 文件扩展名（例如 "jpg", "png", "pdf"）
+     * @return true 表示是图片，false 表示是普通文件
+     */
+    public static boolean isImage(String fileExtension) {
+        if (fileExtension == null || fileExtension.trim().isEmpty()) {
+            return false;
+        }
+        String ext = fileExtension.toLowerCase().trim();
+        return IMAGE_EXTENSIONS.contains(ext);
+    }
 }