Create UTF-8 file using HttpServletResponse
Solution 1
You need to use the character writer of the response, not the byte output stream.
Replace
ServletOutputStream os = res.getOutputStream();
os.print("Hello World");
os.flush();
os.close();
by
res.getWriter().write("Some UTF-8");
Further, I'd recommend setting content type to text/plain
, not to an overly generic one which implies binary content, not character content.
I'm not sure about Notepad++, but in Notepad, if the text document does not contain any characters beyond the ANSI range, it will be interpreted as ANSI. Don't mislead you by this behaviour.
Solution 2
Here is my sample:
private static final String KALIMAH = "\u0644\u064e\u0622 \u0625\u0650\u0644\u0670\u0647\u064e \u0625\u0650\u0644\u0651\u064e\u0627 \u0627\u0644\u0644\u0647\u064f \u0645\u064f\u062d\u064e\u0645\u0651\u064e\u062f\u064c \u0631\u0651\u064e\u0633\u064f\u0648\u0652\u0644\u064f \u0627\u0644\u0644\u0647\u0650";
protected void printGreeting (HttpServletResponse res) throws IOException {
res.setContentType( "text/html" );
res.setCharacterEncoding( "UTF-8" );
PrintWriter out = res.getWriter();
out.write( KALIMAH );
out.close();
}
Admin
Updated on June 14, 2022Comments
-
Admin almost 2 years
I am trying to create a UTF-8 file "myFile.aaa" using HttpServletResponse (HttpServlet). The reason why I need this to be UTF-8 is because it might contain special non-printable characters.
However, code below seems to create ANSI-encoded file. At least that is what Notepad++ says, and what I can see reading chars from this file. What am I doing wrong?
Thanks
public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setHeader("Content-Type", "application/octet-stream; charset=UTF-8"); res.setHeader("Content-Disposition","attachment;filename=myFile.aaa"); res.setCharacterEncoding("UTF-8"); ServletOutputStream os = res.getOutputStream(); os.print("Hello World"); os.flush(); os.close(); }