1.修复不支持文件类型提示时抛异常的问题

2.添加多媒体文件预览支持，如mp4，mp3等文件

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

@@ -0,0 +1,27 @@
+package cn.keking.service.impl;
+
+import cn.keking.service.FilePreview;
+import cn.keking.utils.FileUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.springframework.ui.Model;
+/**
+ * @author : kl
+ * @authorboke : kailing.pub
+ * @create : 2018-03-25 上午11:58
+ * @description:
+ **/
+@Service
+public class MediaFilePreviewImpl implements FilePreview {
+
+    @Autowired
+    FileUtils fileUtils;
+
+    @Override
+    public String filePreviewHandle(String url, Model model) {
+        model.addAttribute("mediaUrl", url);
+        return "media";
+    }
+
+
+}

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

@@ -1,6 +1,9 @@
 package cn.keking.service.impl;
 
+import cn.keking.model.FileAttribute;
 import cn.keking.service.FilePreview;
+import cn.keking.utils.FileUtils;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.ui.Model;
 
@@ -10,8 +13,14 @@ import org.springframework.ui.Model;
  */
 @Service
 public class OtherFilePreviewImpl implements FilePreview {
+    @Autowired
+    FileUtils fileUtils;
+
     @Override
     public String filePreviewHandle(String url, Model model) {
+        FileAttribute fileAttribute=fileUtils.getFileAttribute(url);
+
+        model.addAttribute("fileType",fileAttribute.getSuffix());
         model.addAttribute("msg", "系统还不支持该格式文件的在线预览，" +
                 "如有需要请按下方显示的邮箱地址联系系统维护人员");
         return "fileNotSupported";

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

@@ -30,6 +30,7 @@ public class SimTextFilePreviewImpl implements FilePreview{
         ReturnResponse<String> response = simTextUtil.readSimText(decodedUrl, fileName);
         if (0 != response.getCode()) {
             model.addAttribute("msg", response.getMsg());
+            model.addAttribute("fileType",fileAttribute.getSuffix());
             return "fileNotSupported";
         }
         model.addAttribute("ordinaryUrl", response.getMsg());