[tcp通信]
来源:不详;
client:
- package com.defonds.socket.begin;
- import java.io.BufferedReader;
- import java.io.DataInputStream;
- import java.io.DataOutputStream;
- import java.io.IOException;
- import java.io.InputStreamReader;
- import java.net.Socket;
- public class Client {
- public static final String IP_ADDR = "localhost";//服务器地址
- public static final int PORT = 12345;//服务器端口号
- public static void main(String[] args) {
- System.out.println("客户端启动...");
- System.out.println("当接收到服务器端字符为 \"OK\" 的时候, 客户端将终止\n");
- while (true) {
- Socket socket = null;
- try {
- //创建一个流套接字并将其连接到指定主机上的指定端口号
- socket = new Socket(IP_ADDR, PORT);
- //读取服务器端数据
- DataInputStream input = new DataInputStream(socket.getInputStream());
- //向服务器端发送数据
- DataOutputStream out = new DataOutputStream(socket.getOutputStream());
- System.out.print("请输入: \t");
- String str = new BufferedReader(new InputStreamReader(System.in)).readLine();
- out.writeUTF(str);
- String ret = input.readUTF();
- System.out.println("服务器端返回过来的是: " + ret);
- // 如接收到 "OK" 则断开连接
- if ("OK".equals(ret)) {
- System.out.println("客户端将关闭连接");
- Thread.sleep(500);
- break;
- }
- out.close();
- input.close();
- } catch (Exception e) {
- System.out.println("客户端异常:" + e.getMessage());
- } finally {
- if (socket != null) {
- try {
- socket.close();
- } catch (IOException e) {
- socket = null;
- System.out.println("客户端 finally 异常:" + e.getMessage());
- }
- }
- }
- }
- }
- }
服务端:
- package com.defonds.socket.begin;
- import java.io.BufferedReader;
- import java.io.DataInputStream;
- import java.io.DataOutputStream;
- import java.io.InputStreamReader;
- import java.net.ServerSocket;
- import java.net.Socket;
- public class Server {
- public static final int PORT = 12345;//监听的端口号
- public static void main(String[] args) {
- System.out.println("服务器启动...\n");
- Server server = new Server();
- server.init();
- }
- public void init() {
- try {
- ServerSocket serverSocket = new ServerSocket(PORT);
- while (true) {
- // 一旦有堵塞, 则表示服务器与客户端获得了连接
- Socket client = serverSocket.accept();
- // 处理这次连接
- new HandlerThread(client);
- }
- } catch (Exception e) {
- System.out.println("服务器异常: " + e.getMessage());
- }
- }
- private class HandlerThread implements Runnable {
- private Socket socket;
- public HandlerThread(Socket client) {
- socket = client;
- new Thread(this).start();
- }
- public void run() {
- try {
- // 读取客户端数据
- DataInputStream input = new DataInputStream(socket.getInputStream());
- String clientInputStr = input.readUTF();//这里要注意和客户端输出流的写方法对应,否则会抛 EOFException
- // 处理客户端数据
- System.out.println("客户端发过来的内容:" + clientInputStr);
- // 向客户端回复信息
- DataOutputStream out = new DataOutputStream(socket.getOutputStream());
- System.out.print("请输入:\t");
- // 发送键盘输入的一行
- String s = new BufferedReader(new InputStreamReader(System.in)).readLine();
- out.writeUTF(s);
- out.close();
- input.close();
- } catch (Exception e) {
- System.out.println("服务器 run 异常: " + e.getMessage());
- } finally {
- if (socket != null) {
- try {
- socket.close();
- } catch (Exception e) {
- socket = null;
- System.out.println("服务端 finally 异常:" + e.getMessage());
- }
- }
- }
- }
- }
- }
时间: 2024-10-11 13:13:31