Can not send special characters (UTF-8) from JSP to Servlet: question marks displayed

问题

I have a problem sending special characters like cyrillic or umlauts from a jsp to a servlet. I would greatly appreciate your help here.

Here is what I have done:

Defined the utf-8 charset in the jsp:

<%@ page language="java" contentType="text/html; charset=utf-8" 
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html; charset=utf-8" />
 ...

<div class="authentication">
  <form name="registerForm" action="register" method="get" accept-charset="UTF-8">
    <input type="input" name="newUser" size="17"/>
    <input type="submit" value="senden" />
  </form>
</div>
 ...

Set Tomcat URIEncoding for Connector, in the server.xml
```
<Connector URIEncoding="UTF-8" ...
```

Inside the servlet - set the CharacterEncoding to UTF and read request

public void doGet (HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException{

request.setCharacterEncoding("UTF-8");
String username = request.getParameter("newUser");
System.out.println("encoding: "+request.getCharacterEncoding());

System.out.println("received: "+username);

Here is what gets displayed when using for example: Однако
```
encoding: UTF-8
received: ??????
```

Am I missing something ? I suppose the servlet can not decode the String properly, but I have no idea why is this happening. I've followed all the advises on this topic but had no luck.

thanks in advance.

回答1:

Everything looks fine. Only the System.out.println() console also needs to be configured to interpret the byte stream as UTF-8.

If you're sitting in an IDE like Eclipse, then you can do that by setting Window > Preferences > General > Workspace > Text File Encoding to UTF-8. For other environments, you should be more specific about that so that we can tell how to configure it.

来源：https://stackoverflow.com/questions/7539590/can-not-send-special-characters-utf-8-from-jsp-to-servlet-question-marks-disp

标签

jsp

servlets

utf-8

character-encoding