PDF预览也支持图片模式和查看大图

jodconverter-web/src/main/java/cn/keking/service/impl/OfficeFilePreviewImpl.java

@@ -60,6 +60,7 @@ public class OfficeFilePreviewImpl implements FilePreview {
             if (!new File(filePath).exists()) {
                 ReturnResponse<String> response = downloadUtils.downLoad(decodedUrl, suffix, null);
                 if (0 != response.getCode()) {
+                    model.addAttribute("fileType", suffix);
                     model.addAttribute("msg", response.getMsg());
                     return "fileNotSupported";
                 }

jodconverter-web/src/main/java/cn/keking/service/impl/PdfFilePreviewImpl.java

 package cn.keking.service.impl;
 
+import cn.keking.config.ConfigConstants;
+import cn.keking.model.FileAttribute;
+import cn.keking.model.ReturnResponse;
 import cn.keking.service.FilePreview;
+import cn.keking.utils.DownloadUtils;
+import cn.keking.utils.FileUtils;
+import cn.keking.utils.PdfUtils;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.ui.Model;
 
+import java.io.File;
+import java.util.List;
+
 /**
  * Created by kl on 2018/1/17.
  * Content :处理pdf文件
@@ -11,9 +21,53 @@ import org.springframework.ui.Model;
 @Service
 public class PdfFilePreviewImpl implements FilePreview{
 
+
+    @Autowired
+    FileUtils fileUtils;
+
+    @Autowired
+    PdfUtils pdfUtils;
+
+    @Autowired
+    DownloadUtils downloadUtils;
+
+    String fileDir = ConfigConstants.getFileDir();
+
     @Override
     public String filePreviewHandle(String url, Model model) {
+        FileAttribute fileAttribute=fileUtils.getFileAttribute(url);
+        String decodedUrl=fileAttribute.getDecodedUrl();
+        String suffix=fileAttribute.getSuffix();
+        String fileName=fileAttribute.getName();
+        String officePreviewType = model.asMap().get("officePreviewType") == null ? "" : model.asMap().get("officePreviewType").toString();
         model.addAttribute("pdfUrl", url);
+        String pdfName = fileName.substring(0, fileName.lastIndexOf(".") + 1) + "pdf";
+        String outFilePath = fileDir + pdfName;
+        if (OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType) || OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_ALLIMAGES.equals(officePreviewType)) {
+            //当文件不存在时，就去下载
+            if (!new File(outFilePath).exists()) {
+                ReturnResponse<String> response = downloadUtils.downLoad(decodedUrl, suffix, fileName);
+                if (0 != response.getCode()) {
+                    model.addAttribute("fileType", suffix);
+                    model.addAttribute("msg", response.getMsg());
+                    return "fileNotSupported";
+                }
+                outFilePath = response.getContent();
+            }
+            List<String> imageUrls = pdfUtils.pdf2jpg(outFilePath, pdfName, url);
+            if (imageUrls == null || imageUrls.size() < 1) {
+                model.addAttribute("msg", "pdf转图片异常，请联系管理员");
+                model.addAttribute("fileType",fileAttribute.getSuffix());
+                return "fileNotSupported";
+            }
+            model.addAttribute("imgurls", imageUrls);
+            model.addAttribute("currentUrl", imageUrls.get(0));
+            if (OfficeFilePreviewImpl.OFFICE_PREVIEW_TYPE_IMAGE.equals(officePreviewType)) {
+                return "officePicture";
+            } else {
+                return "picture";
+            }
+        }
         return "pdf";
     }
 }