中文名称的图片在IE系列浏览器中另存为文件名被截取

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中文名称的图片在IE系列浏览器中另存为文件名被截取15

只在IE浏览器出现，且只是右键另存为才有问题。左键直接下载，CTRL+C,CTRL+V。甚至在IE缓存文件夹中都是正确的。

JSP

  <td align="center" valign="middle" >
                <a href="<%=abspath%><s:property value='attachPath(filepath,filename,realfilename)'/>" target="_blank" title="<s:property value='realfilename'/>">
				 <img src="<%=abspath%><s:property value='attachPath(filepath,"/s_"+filename,realfilename)'/>" width="30" height="30" border="0" /> </a></td>

attachPath

	public String attachPath(String filepath,String filename,String realname){
		String url ="fileupload!newAttachDownload.action?tid=";
		//boolean isFileRead = false;
		if(filepath!=null && !filepath.equals("")&& filename!=null && !filename.equals("")){
			String html = getSessionUser().getId() +","+ filepath + "," + filename+","+realname;
			 return url+fish.encryptString(html);
		}else{
			return "";
		}	
	}

newAttachDownload

public String newAttachDownload(){
		if(tid!=null&&!"".equals(tid)){
			String html = fish.decryptString(tid);
			if(html == null){return "document_error";}
			String [] arr = html.split(",");
			if(arr!=null && arr.length >= 3){
				if(!arr[0].equals(getSessionUser().getId().toString())){return "document_error";}
				if(arr.length==4){
					fileName = arr[3];
				} else if(arr.length==3){
					fileName = arr[2];
				} else if(arr.length>=5) {
					fileName = "";
					for(int i=3; i<arr.length; i++) {
						fileName += arr[i];
						if(i+1 < arr.length) {
							fileName += ",";
						}
					}
				}
				if (null != fileName && (!"".equals(fileName))) {
					try {
						//Chinese code into UTF-8
						//fileName = new String(fileName.getBytes("GBK"), "ISO-8859-1");
						String agent =  ServletActionContext.getRequest().getHeader("USER-AGENT");
				        if (null != agent){   
				            if (-1 != agent.indexOf("Firefox")) {//Firefox   
				            	fileName = "=?UTF-8?B?" + (new String(org.apache.commons.codec.binary.Base64.encodeBase64(fileName.getBytes("UTF-8"))))+ "?=";
				            }else if (-1 != agent.indexOf("Chrome")) {//Chrome   
				            	fileName = new String(fileName.getBytes(), "ISO8859-1");
				            } else {//IE7+   
				            	fileName = java.net.URLEncoder.encode(fileName, "UTF-8"); 
				            	fileName = fileName.replaceAll("\\+", "%20");
				            	fileName = fileName.replaceAll(java.net.URLEncoder.encode(":"), ":");
				            	fileName = fileName.replaceAll(java.net.URLEncoder.encode("/"), "/");
				            	ServletActionContext.getResponse().setHeader( "Content-Disposition", "attachment;filename="  + fileName);
				            }   
				        }
					} catch (UnsupportedEncodingException e) {
						this.addActionMessage("String turn yards errors.Chinese code");
//						e.printStackTrace();
						log.error("Bad encoding on "+fileName, e);
						return "document_error";
					} 
				}
				
//				File input = new File(WEB_PATH+""+arr[1]+"/"+arr[2]);
				File input = new File(FILE_UPLOAD_PATH+""+arr[1]+"/"+arr[2]);
				System.out.println(input);
				if(input.canRead()){
					try {
						fileStream = new FileInputStream(input);
					} catch (FileNotFoundException e) {
						e.printStackTrace();
					}
					return "file_download";
				}else{
					this.addActionMessage("Download the file failed, the file has been deleted or does not exist!");
					return "document_error";
				}
			}else{
				return "document_error";
			}
		}else{
			return "document_error";
		}
	}

            <result name="file_download" type="stream">
				<param name="inputName">fileStream</param>
				<param name="contentType">
				    ${contentType}
				</param>
				<param name="contentDisposition">
					attachment;filename="${fileName}"
				</param>
				<param name="bufferSize">2048</param>
			</result>

问题补充：之前，关于图片的文件名都是英文+数字。最近增强了这部分，就是UPLOAD的时候的文件名，Download的时候也要是原本的文件名。所以就涉及了中文的问题。目前乱码问题没有了。可是在IE另存为的时候却一直有问题。