Springmvc File Download file name Dash problem the ultimate solution

Directly on the code: code fragment in action.

@RequestMapping ("Download")
@ModelAttribute (throws Exception {
Account ACC = Getloginaccount ();
if (acc==null | | StringUtils. IsBlank (Acc.getaccount ())) {
Return ("/account/login");
}

String fileUrl = Template.getfileurl (); URL path, such as http://xxxxx/xxx/xxxx/image/20170525/Chinese. jpg
String filename = fileurl.substring (Fileurl.lastindexof (1); Intercept the last filename-> Chinese. JPG 
 filename = processfilename (request, filename); 
 Bufferedoutputstream bf = null; 
 try {
 Response.setheader (" Content-disposition ", " attachment; filename = "+ filename");  
  BF = new Bufferedoutputstream (Response.getoutputstream ()); 
 Bf.write (this. Httpconverbytes (fileurl,request)); 
} .... 
 
 
 Important Processfilename method. 
            

public static string Processfilename (HttpServletRequest request, string fileNames) {
String Codedfilename =Null
   try {
String Agent = Request.getheader ("User-agent");
      if (Null! = Agent &&-1! = Agent.indexof ("MSIE") | |Null! = Agent
&&-1! = Agent.indexof ("Trident")) {Ie
String name = Java.net.URLEncoder.Encode (FileNames, Codedfilename = name; 
} else if (1! = Agent.indexof (" Mozilla ") {//Firefox, Chrome, etc. 
  Codedfilename = new String (Filenames.getbytes ( } 
} catch (Exception e) {
 E.printstacktrace (); 
} 
 return codedfilename; 
} 
 
//httpconverbytes method 
            

public static byte[] Httpconverbytes (String path,httpservletrequest request) {
Bufferedinputstream in =Null
Bytearrayoutputstream out =Null
URLConnection conn =Null
   int httpresult=0;
 try {
StringBuffer SB =New StringBuffer ();
 Forint i=0;i<path.length (); i++) {
 Char A=path.charat (i); The Chinese part of the URL path is re-encoded very important
 if (a>127) {Encode the Chinese UTF-8
Sb.append (Urlencoder.Encode (String.ValueOf (a),"Utf-8"));
}else{
Sb.append (String.ValueOf (a));
}
}
URL url =New URL (Sb.tostring ());Create URL
URLConnection urlconn = Url.openconnection ();Attempt to connect and get return status code Urlconn.connect ();
HttpURLConnection httpconn = (httpurlconnection) urlconn;
Httpresult = Httpconn.getresponsecode ();
in =New Bufferedinputstream (Httpconn.getinputstream ());

 if (httpresult! = httpurlconnection.HTTP_OK) {Not equal to HTTP_OK indicates that the connection was unsuccessful
System.Out.print ("Connection Failed! ");
}else {
out =New Bytearrayoutputstream (1024);
 byte[] Temp =New byte[1024];
 int size =0;
 while (size = In.read (temp))! =-1) {
 Out.write (temp, 0, size); 
} 
 byte["content = Out.tobytearray (); 
 return content; 
} 
} catch (Exception e) {
 E.printstacktrace (); 
} 
 finally {
  try {
 In.close (); 
} catch (IOException e) {
 E.printstacktrace (); 
} 
 try {
 Out.close (); 
} catch (IOException e) {
 E.printstacktrace (); 
} 
} 
 return null; 
} The 
 
 
 is resolved with the underscore issue above. 
           

Springmvc File Download file name Dash problem the ultimate solution