SERVLET APPLET 中文乱码

[SHY1977]

在ｓｅｒｖｌｅｔ中
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
...
resp.setContentType("text/plain");
PrintWriter toApplet = resp.getWriter();
toApplet.println("中文字符串");
　...
}

在Ａｐｐｌｅｔ中
InputStream in = servletConnection.getInputStream();
BufferedReader buff = new BufferedReader(new InputStreamReader(in));
String str1=buff.readLine();

打印str1的结果都是？？？？，请大驾帮忙解决，谢谢

[SHY1977]

请大家帮帮我啊，谢谢了