下载时防止中文文件名乱码

		    String userAgent = request.getHeader("User-Agent");  
		    String formFileName = file.getFileName();  
		        
		    // 针对IE或者以IE为内核的浏览器：  
		    if (userAgent.contains("MSIE") || userAgent.contains("Trident")) {  
		        formFileName = java.net.URLEncoder.encode(formFileName, "UTF-8");  
		    } else {  
		        // 非IE浏览器的处理：  
		        formFileName = new String(formFileName.getBytes("UTF-8"), "ISO-8859-1");  
		    }  
		    response.setHeader("Content-disposition",String.format("attachment; filename=\"%s\"", formFileName));  
		    response.setContentType("multipart/form-data");   
		    response.setCharacterEncoding("UTF-8");