TCP简单通讯

客户端代码:

package com.kaige123.net01;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import java.net.UnknownHostException;/***凯哥*/public class Client {public static void main(String[] args) throws Exception {// 如果对方服务器不存在就会报错Socket socket = new Socket("127.0.0.1", 8080); InputStream input = socket.getInputStream();OutputStream output = socket.getOutputStream();output.write("你好服务器，我是凯哥，你还记得我吗？".getBytes());output.flush();//赶紧把内容输出到对方byte[] b=new byte[1024];int len=input.read(b);System.out.println("服务器说:"+new String(b,0,len));output.close();input.close();socket.close();}}

服务端代码:

package com.kaige123.net01;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.ServerSocket;import java.net.Socket;/***凯哥*/public class Server{public static void main(String[] args) throws Exception {// 如果都被占用 那就会抛异常// 建立好一个服务端 监听8080端口ServerSocket server = new ServerSocket(8080);// 等待客户端来连接服务器Socket socket = server.accept();  //代码运行到这句就会卡主 堵塞  等待InputStream input = socket.getInputStream();OutputStream output = socket.getOutputStream();byte[] b = new byte[1024 * 5];int len = input.read(b);String s = new String(b, 0, len);System.out.println(s);s = "你好凯哥，我是从东莞回来的美女!!";output.write(s.getBytes());output.close();input.close();socket.close();}}