diff --git a/server/src/main/java/cn/keking/service/impl/TiffFilePreviewImpl.java b/server/src/main/java/cn/keking/service/impl/TiffFilePreviewImpl.java
index 560f1f02..f61471f5 100644
--- a/server/src/main/java/cn/keking/service/impl/TiffFilePreviewImpl.java
+++ b/server/src/main/java/cn/keking/service/impl/TiffFilePreviewImpl.java
@@ -3,13 +3,12 @@ package cn.keking.service.impl;
 import cn.keking.config.ConfigConstants;
 import cn.keking.model.FileAttribute;
 import cn.keking.model.ReturnResponse;
+import cn.keking.service.FileHandlerService;
 import cn.keking.service.FilePreview;
 import cn.keking.utils.ConvertPicUtil;
 import cn.keking.utils.DownloadUtils;
 import cn.keking.utils.WebUtils;
 import cn.keking.web.filter.BaseUrlFilter;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
 import org.springframework.ui.Model;
 import org.springframework.util.StringUtils;
@@ -27,30 +26,28 @@ import java.util.List;
 @Service
 public class TiffFilePreviewImpl implements FilePreview {
 
-    private final static Logger logger = LoggerFactory.getLogger(TiffFilePreviewImpl.class);
-
-    private final PictureFilePreviewImpl pictureFilePreview;
+    private final FileHandlerService fileHandlerService;
+    private final OtherFilePreviewImpl otherFilePreview;
+    public TiffFilePreviewImpl(FileHandlerService fileHandlerService,OtherFilePreviewImpl otherFilePreview) {
+        this.fileHandlerService = fileHandlerService;
+        this.otherFilePreview = otherFilePreview;
+    }
     private static final String INITIALIZE_MEMORY_SIZE = "initializeMemorySize";
     //默认初始化 50MB 内存
     private static final long INITIALIZE_MEMORY_SIZE_VALUE_DEFAULT = 1024L * 1024 * 50;
-
     private final String fileDir = ConfigConstants.getFileDir();
 
-    public TiffFilePreviewImpl(PictureFilePreviewImpl pictureFilePreview) {
-        this.pictureFilePreview = pictureFilePreview;
-    }
 
     @Override
     public String filePreviewHandle(String url, Model model, FileAttribute fileAttribute) {
+        String fileName = fileAttribute.getName();
+        String baseUrl = BaseUrlFilter.getBaseUrl();
         String tifPreviewType = ConfigConstants.getTifPreviewType();
         String tifOnLinePreviewType = fileAttribute.getTifPreviewType();
         if (StringUtils.hasText(tifOnLinePreviewType)) {
             tifPreviewType = tifOnLinePreviewType;
         }
-
         if ("tif".equalsIgnoreCase(tifPreviewType)) {
-
-            pictureFilePreview.filePreviewHandle(url, model, fileAttribute);
             String fileSize = WebUtils.getUrlParameterReg(url, INITIALIZE_MEMORY_SIZE);
             if (StringUtils.hasText(fileSize)) {
                 model.addAttribute(INITIALIZE_MEMORY_SIZE, fileSize);
@@ -58,41 +55,36 @@ public class TiffFilePreviewImpl implements FilePreview {
                 model.addAttribute(INITIALIZE_MEMORY_SIZE, Long.toString(INITIALIZE_MEMORY_SIZE_VALUE_DEFAULT));
             }
             return TIFF_FILE_PREVIEW_PAGE;
-
         } else if ("jpg".equalsIgnoreCase(tifPreviewType) || "pdf".equalsIgnoreCase(tifPreviewType)) {
-            String inputFileName = url.substring(url.lastIndexOf("/") + 1);
-            String inputFileNamePrefix = inputFileName.substring(0, inputFileName.lastIndexOf("."));
-
-            String strLocalTif = fileDir + inputFileName;
-            File fileTiff = new File(strLocalTif);
-            // 如果本地不存在这个tif文件，则下载
-            if (!fileTiff.exists()) {
-                ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, inputFileName);
-                if (response.isFailure()) {
-                    return NOT_SUPPORTED_FILE_PAGE;
-                }
-            }
-
-            String baseUrl = BaseUrlFilter.getBaseUrl();
+            String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + "pdf";
+            String jpgName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + "jpg";
+            String strLocalTif = fileDir + fileName;
+            String outFilePath = fileDir + pdfName;
             if ("pdf".equalsIgnoreCase(tifPreviewType)) {
-                // 以PDF模式预览的过程
-                File filePdf = new File(fileDir + inputFileNamePrefix + ".pdf");
-                // 如果本地不存在对应的pdf，则调用转换过程。否则直接用现有的pdf文件
-                if (!filePdf.exists()) {
-                    filePdf = ConvertPicUtil.convertTif2Pdf(strLocalTif, fileDir + inputFileNamePrefix + ".pdf");
-                }
-
-                // 如果pdf已经存在，则将url路径加入到对象中，返回给页面
-                assert filePdf != null;
-                if (filePdf.exists()) {
-                    String pdfUrl = baseUrl + inputFileNamePrefix + ".pdf";
-                    model.addAttribute("pdfUrl", pdfUrl);
-
+                    //当文件不存在时，就去下载
+                    if (!fileHandlerService.listConvertedFiles().containsKey(pdfName) || !ConfigConstants.isCacheEnabled()) {
+                        ReturnResponse<String> response = DownloadUtils.downLoad(fileAttribute, fileName);
+                        if (response.isFailure()) {
+                            return otherFilePreview.notSupportedFile(model, fileAttribute, response.getMsg());
+                        }
+                        String filePath = response.getContent();
+                        if (ConfigConstants.isCacheEnabled()) {
+                            // 加入缓存
+                            fileHandlerService.addConvertedFile(pdfName, fileHandlerService.getRelativePath(outFilePath));
+                        }
+                        if(ConvertPicUtil.convertJpg2Pdf(filePath, outFilePath)){
+                            model.addAttribute("pdfUrl", pdfName);
+                            return PDF_FILE_PREVIEW_PAGE;
+                        }
+                    }
+                 else {
+                    model.addAttribute("pdfUrl", pdfName);
                     return PDF_FILE_PREVIEW_PAGE;
                 }
+
             } else {
                 // 以JPG模式预览的过程
-                String strJpgFilePathName = fileDir + inputFileNamePrefix + ".jpg";
+                String strJpgFilePathName = fileDir + jpgName;
                 // 将tif转换为jpg，返回转换后的文件路径、文件名的list
                 List<String> listPic2Jpg = ConvertPicUtil.convertTif2Jpg(strLocalTif, strJpgFilePathName);
                 // 将返回页面的图片url的list对象
@@ -101,19 +93,11 @@ public class TiffFilePreviewImpl implements FilePreview {
                 for (String strJpg : listPic2Jpg) {
                     listImageUrls.add(baseUrl + strJpg);
                 }
-
                 model.addAttribute("imgUrls", listImageUrls);
                 model.addAttribute("currentUrl", listImageUrls.get(0));
             }
-
-            // 转换后的tif没用了，可以删掉了
-            if (fileTiff.exists() && !fileTiff.delete()) {
-                logger.error("{} 清理失败", strLocalTif);
-            }
-
             return PICTURE_FILE_PREVIEW_PAGE;
         }
-
         return NOT_SUPPORTED_FILE_PAGE;
     }
 }