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[Java教程][javaSE] 网络编程(TCP通信)


客户端A与服务端建立通信,服务端获取到客户端A的Socket对象,通过这个通路进行通信

 

客户端:

 

获取Socket对象,new出来,创建客户端的Socket服务,构造参数:Sting主机,int 端口

调用Socket对象的getOutputStream()方法,获取输出流OutputStream对象

调用OutputStream对象的write()方法,参数:byte[]字节数组

 

import java.io.IOException;import java.io.OutputStream;import java.net.InetAddress;import java.net.Socket;/** * 客户端 * @author taoshihan * */public class Client {  public static void main(String[] args) throws Exception, IOException {    Socket socket=new Socket(InetAddress.getLocalHost(), 10003);    OutputStream outputStream=socket.getOutputStream();    outputStream.write("Hello TCP".getBytes());      }}

 

服务端:

获取ServerSocket对象,new出来,构造参数:int端口

调用ServerSocket对象的accept()方法,获取到Socket对象,阻塞式的

调用Socket对象的getInputStream()方法,获取输入流InputStream对象

读取输入流,数据量不大,不循环了直接调用InputStream对象的read()方法,参数:byte[]数组

调用Socket对象的getInetAddress()方法,获取到InetAddress对象

调用Socket对象的close()方法,关闭客户端

 

import java.io.InputStream;import java.net.InetAddress;import java.net.ServerSocket;import java.net.Socket;/** * 服务端 * * @author taoshihan * */public class Server {  public static void main(String[] args) throws Exception {    ServerSocket serverSocket = new ServerSocket(10003);    while (true) {      Socket socket = serverSocket.accept();      InputStream inputStream = socket.getInputStream();      byte[] buf = new byte[1024];      int len = inputStream.read(buf);      InetAddress ip = socket.getInetAddress();      socket.close();      System.out.println("来自" + ip.getHostAddress() + "说:"          + new String(buf, 0, len));    }  }}