JSP中fckeditor控件－文件类型与大小的控制

（一）文件类型的控制
此处只是演示图片类型的控制，其它的控制需要查看WebRoot/fckeditor/editor/dialog/下面对应的 js文件
fckeditor.properties写法参考fckeditor-java-core-2.4.1.jar/net.fckeditor.handlers/net.fckeditor.handlers/default.properties文件
myconfig.js写法参考WebRoot/fckeditor/fckconfig.js文件

如果想添加一种新的图片类型如.abc，修改方式如下：
在fckeditor.properties添加属性connector.resourceType.image.extensions.allowed = bmp|gif|jpeg|jpg|png |abc
在myconfig.js中添加FCKConfig.ImageUploadAllowedExtensions = ".(jpg|gif|jpeg|png|bmp |abc)$" ;

（二）文件大小的控制

修改ConnectorServlet.java中文件上传前的判断

1. try {
2.                     List<FileItem> items = upload.parseRequest(request);
3.                     FileItem uplFile = items.get(0);
4.                     String rawName = UtilsFile.sanitizeFileName(uplFile.getName());
5.                     String filename = FilenameUtils.getName(rawName);
6.                     String baseName = FilenameUtils.removeExtension(filename);
7.                     String extension = FilenameUtils.getExtension(filename);
8.                     //如果这个文件的扩展名不允许上传
9.                     if (!ExtensionsHandler.isAllowed(resourceType, extension))
10.                         ur = new UploadResponse(UploadResponse.SC_INVALID_EXTENSION);
11.                     //如果文件大小超过限制
12.                     else if(uplFile.getSize()>10*1024){
13.                     //传递一个自定义的错误码204
14.                         ur = new UploadResponse(204);
15.                     }
16.                     
17.                     //如果不存在以上情况，则保存
18.                     else {
19.                         filename=UUID.randomUUID().toString()+"."+extension;
20.                         File pathToSave = new File(currentDir, filename);
21.                         int counter = 1;
22.                         while (pathToSave.exists()) {
23.                             newFilename = baseName.concat("(").concat(String.valueOf(counter))
24.                                     .concat(")").concat(".").concat(extension);
25.                             pathToSave = new File(currentDir, newFilename);
26.                             counter++;
27.                         }
28.                         if (Utils.isEmpty(newFilename))
29.                             ur = new UploadResponse(UploadResponse.SC_OK, UtilsResponse
30.                                     .constructResponseUrl(request, resourceType, currentFolderStr,
31.                                             true, ConnectorHandler.isFullUrl()).concat(filename));
32.                         else
33.                             ur = new UploadResponse(UploadResponse.SC_RENAMED,
34.                                     UtilsResponse.constructResponseUrl(request, resourceType,
35.                                             currentFolderStr, true, ConnectorHandler.isFullUrl())
36.                                             .concat(newFilename), newFilename);
37.                         if (resourceType.equals(ResourceTypeHandler.IMAGE)
38.                                 && ConnectorHandler.isSecureImageUploads()) {
39.                             if (UtilsFile.isImage(uplFile.getInputStream()))
40.                                 uplFile.write(pathToSave);
41.                             else {
42.                                 uplFile.delete();
43.                                 ur = new UploadResponse(UploadResponse.SC_INVALID_EXTENSION);
44.                             }
45.                         } else
46.                             uplFile.write(pathToSave);
48.                     }
49.                 } catch (Exception e)

在WebRoot/fckeditor/editor/dialog/fck_image/fck_image.js中对自定义错误进行处理。

1.     switch ( errorNumber )
2.     {
3.         case 0 :    // No errors
4.             alert( '文件上传成功' ) ;
5.             break ;
6.         case 1 :    // Custom error
7.             alert( customMsg ) ;
8.             return ;
9.         case 101 :  // Custom warning
10.             alert( customMsg ) ;
11.             break ;
12.         case 201 :
13.             alert( 'A file with the same name is already available. The uploaded file has been renamed to "' + fileName + '"' ) ;
14.             break ;
15.         case 202 :
16.             alert( 'Invalid file type' ) ;
17.             return ;
18.         case 203 :
19.             alert( "Security error. You probably don't have enough permissions to upload. Please check your server." ) ;
20.             return ;
21.         case 204 :
22.             alert( "图片文件大小超出10K" ) ;
23.             return ;
24.         case 500 :
25.             alert( 'The connector is disabled' ) ;
26.             break ;
27.         default :
28.             alert( 'Error on file upload. Error number: ' + errorNumber ) ;
29.             return ;
30.     }

如果限制的事其它类型的文件大小，需要去WebRoot/fckeditor/editor/dialog/目录下修改对应的js文件。