tringBuilder response =new StringBuilder();

             //1)  HTTP协议版本、状态代码、描述

             response.append("HTTP/1.1").append(BLANK).append("200").append(BLANK).append("OK").append(CRLF);

             //2)  响应头(Response Head)

             response.append("Server:bjsxt Server/0.0.1").append(CRLF);

             response.append("Date:").append(new Date()).append(CRLF);

             response.append("Content-type:text/html;charset=GBK").append(CRLF);

             //正文长度 ：字节长度

             response.append("Content-Length:").append(responseContext.toString().getBytes().length).append(CRLF);

             //3)正文之前

             response.append(CRLF);

             //4)正文

             response.append(responseContext);

             System.out.println(responseContext);