拦截浏览器发来请求，发送至tomcat，接收tomcat所发出的响应。

public static void main(String[] args) {
        // TODO Auto-generated method stub
        ServerSocket server;
        try {
            server = new ServerSocket(8088);
            while(true)
            {
                Socket socket = server.accept();//等待客户机连接server，若连接则创建一套接字（会堵塞线程的继续执行）
                InputStream in = socket.getInputStream();
                InputStreamReader reader = new InputStreamReader(in);
                char[] chars = new char[1024];
                int count = reader.read(chars);
                System.out.println(new String(chars,0,count));
                
                //与tomcat建立链接，形成一个代理服务器，发送请求至tomcat再获取tomcat的响应
                Socket tomcat = new Socket("127.0.0.1",8080);
                OutputStream out = tomcat.getOutputStream();
                OutputStreamWriter writer = new OutputStreamWriter(out);
                writer.write(chars,0,count);
                writer.flush();
                out.flush();
                InputStream tomcatIn = tomcat.getInputStream();
                InputStreamReader tomcatReader = new InputStreamReader(tomcatIn);
                char[] tomcatChars = new char[2048];
                count = tomcatReader.read(tomcatChars);
                System.out.println(new String(tomcatChars,0,count));            
            }
        } catch (SocketException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }