How can I tell Tomcat to use UTF-8 internally?
Question
So I have this very simple html file:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<form method="post" action="formpost.do" accept-charset="utf-8">
<label for="id">Your name please:</label>
<input id="id" type="text" name="name"/>
<input type="submit"/>
</form>
</body>
</html>
And the output.jsp:
<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<%= request.getAttribute("name") %>
</body>
</html>
When I type "ğğğ" in the form, I see "ğğğ" as expected in output.jsp. The Servlet that handles this form looks like this:
@Override
protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws ServletException, IOException {
httpServletResponse.setCharacterEncoding("UTF-8");
httpServletRequest.setCharacterEncoding("UTF-8");
String name = httpServletRequest.getParameter("name");
httpServletRequest.setAttribute("name",name);
PrintWriter printWriter = new PrintWriter(new File("C:/text.txt"));
printWriter.write(name);
printWriter.flush();
printWriter.close();
httpServletRequest.getRequestDispatcher("/output.jsp")
.forward(httpServletRequest, httpServletResponse);
}
The problem is, in text.txt file I will see "???" instead of "ğğğ". I have been trying to solve this for hours but no luck..
I have
JAVA_TOOL_OPTIONS=-Dfile.encoding=UTF8
in Windows environmental variables, but it changes nothing as far as I can say.
When I debug this application, the variable "name" is seen as "ğğğ" in the debugger window if it helps at all.
So how can I make the System.out print the correct characters?
EDIT 1 When I create a separate Java project and simply run:
public static void main(String[] args)
throws Exception {
PrintWriter printWriter = new PrintWriter(new File("C:/text.txt"));
printWriter.write("ğğğ");
printWriter.flush();
printWriter.close();
}
everything is as expected in the text file.
EDIT 2 I already have in my server.xml:
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" URIEncoding="UTF-8"/>
4 answers
solution1
4 ACCPTED 2014-04-13 16:10:22
I don't think this is a Tomcat issue. It's a Java issue with how you are writing to the file.
Use the appropriate character set when writing.
PrintWriter printWriter = new PrintWriter(new File("C:/text.txt"), "UTF-8");
and reading, obviously.
solution2
1 2014-04-13 16:09:05
UTF-8 issues can be tricky. But in Tomcat 6 on Ubuntu I handle it this way. First find the server.xml file & open it up for editing. I like to use nano but you should use whatever editor you feel comfortable with:
sudo nano /etc/tomcat6/server.xml
Now look for the fragment for <Connector… and place URIEncoding="UTF-8" in there. In one of my setups it looks like this:
<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
URIEncoding="UTF-8"
redirectPort="8443" />
solution3
0 2014-04-13 16:09:15
What you probably need in this case is to set the connector in server.xml like the following:
<Connector URIEncoding="UTF-8/>
Of course in the connector you should set whatever other properties you need
solution4
0 2014-04-20 08:07:30
Somehow I made it work.
This is the JSP file I have:
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="utf-8"/>
</head>
<body>
<form accept-charset="UTF-8" action="postform.do" method="post">
<label>
<input type="text" name="name"/>
</label>
<input type="submit" name="submit" value="Post!">
</form>
</body>
</html>
and the servlet:
@Override
protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
throws ServletException, IOException {
httpServletResponse.setCharacterEncoding("utf-8");
httpServletResponse.setContentType("text/html");
httpServletRequest.setCharacterEncoding("utf-8");
final String name = httpServletRequest.getParameter("name");
System.out.println(name);
final PrintWriter writer = httpServletResponse.getWriter();
writer.print(name);
writer.flush();
}
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