Html表单提交到Servlet输出到页面乱码

//		设置输入的编码格式为utf-8
		request.setCharacterEncoding("utf8");
//		设置输入的编码格式为utf-8
		response.setCharacterEncoding("utf8");

public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
//		设置输入的编码格式为utf-8
		request.setCharacterEncoding("utf8");
//		设置输入的编码格式为utf-8
		response.setCharacterEncoding("utf8");
//		给浏览器的标示，该字体为text/html
		response.setContentType("text/html");
		
		PrintWriter out = response.getWriter();
		
//      做一些输出操作...........
//      out.println();
		out.flush();
		out.close();
	}