java文件下载文件名乱码问题解决方案

		        try {  
		            long fileLength = new File(downLoadPath).length();
		            String userAgent = request.getHeader("User-Agent"); 
			        
		           if (null != userAgent && -1 != userAgent.indexOf("MSIE") || null != userAgent && -1 != userAgent.indexOf("Trident")) {     // ie  
		                 fileName = java.net.URLEncoder.encode(fileName, "UTF8");  
		           } else if (null != userAgent && -1 != userAgent.indexOf("Mozilla")) {           // 火狐,chrome等  
		        	   fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");  
		           }  
			           
			        response.setHeader("Content-disposition", String.format("attachment; filename=\"%s\"", fileName));
			        response.setContentType("application/x-download;");
			        
			        response.setCharacterEncoding("UTF-8"); 
		            response.setHeader("Content-Length", String.valueOf(fileLength));