学习ajax验证表单时候中文乱码的问题

[anltech]

在学习ajax验证的时候：
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();

boolean passed = validateUseName(request.getParameter("usename"));
response.setContentType("text/xml;;charset=UTF-8");
response.setHeader("Cache-Control", "no-cache");
String message = "不可使用的用户名";

if (passed) {
message = "可使用的用户名";
}
out.println("<response>");
out.println("<passed>" + Boolean.toString(passed) + "</passed>");
out.println("<message>" + message + "</message>");
out.println("</response>");
out.close();
}

在页面显示为乱码，请问如何显示正常的中文？谢谢

[BuKeQi]

用utf-8

[liuph3000]

utf-8改gb2312