1.

public void doGet(HttpServletRequest request, HttpServletResponse response)			throws ServletException, IOException {		print3(response);	}	private void print(HttpServletResponse response) throws IOException,	UnsupportedEncodingException {		String str = "中国";		OutputStream out = response.getOutputStream();		out.write(str.getBytes());	}

2.

private void print1(HttpServletResponse response) throws IOException,			UnsupportedEncodingException {		response.setHeader("content-type", "text/html;charset=UTF-8");		String str = "中国";		OutputStream out = response.getOutputStream();		out.write(str.getBytes("UTF-8"));	}

3.

private void print2(HttpServletResponse response) throws IOException,	UnsupportedEncodingException {		String str = "中国";		OutputStream out = response.getOutputStream();		out.write("
     ".getBytes());		out.write(str.getBytes("UTF-8"));	}