监听本机端口获取数据

来源：互联网发布：淘宝用是谁写的编辑：程序博客网时间：2024/05/19 01:30

其实就是在本机建立一个server端监听这个端口，如下

udpServer：

package TTt;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;public class UDPServer {    public static void main(String args[]) throws Exception    {        //监听9876端口       DatagramSocket serverSocket = new DatagramSocket(9876);          byte[] receiveData = new byte[1024];          byte[] sendData = new byte[1024];          while(true)             {                //构造数据包接收数据                DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);                //接收数据                serverSocket.receive(receivePacket);                //解析数据                String sentence = new String( receivePacket.getData());                System.out.println("RECEIVED: " + sentence);             }    }}

TCpServer:

package tcp;import java.io.IOException;import java.io.InputStreamReader;import java.io.Reader;import java.net.ServerSocket;import java.net.Socket;public class Server {            public static void main(String args[]) throws IOException {          //为了简单起见，所有的异常信息都往外抛          int port = 8898;          //定义一个ServerSocket监听在端口8899上          ServerSocket server = new ServerSocket(port);          //server尝试接收其他Socket的连接请求，server的accept方法是阻塞式的          Socket socket = server.accept();          //跟客户端建立好连接之后，我们就可以获取socket的InputStream，并从中读取客户端发过来的信息了。          Reader reader = new InputStreamReader(socket.getInputStream());          char chars[] = new char[64];          int len;          StringBuilder sb = new StringBuilder();          while ((len=reader.read(chars)) != -1) {             sb.append(new String(chars, 0, len));          }          System.out.println("from client: " + sb);                    reader.close();          socket.close();          server.close();       }           }

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