java网络编程 tcp

使用TCP协议编写一个网络程序，设置服务器端的监听端口是8002，当与客户端建立连接后，服务器端向客户端发送数据“Hello, world”，客户端收到数据后打印输出。

mytcpserver.java

package javasocket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class mytcpserver {

public static void main(String[] args) {
// TODO Auto-generated method stub
try{
            ServerSocket s = new ServerSocket(8002);
while(true){
                Socket s1 = s.accept();
                OutputStream os = s1.getOutputStream();
                DataOutputStream dis = new DataOutputStream(os);
                dis.writeUTF("Hello,wrold!");
                dis.close();
                s1.close();
            }           

        }catch(Exception e){
            e.printStackTrace();
        }
    }

}

mytcpclient.java

package javasocket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class mytcpclient {

public static void main(String[] args) {
// TODO Auto-generated method stub
try{
            Socket s1 = new Socket("127.0.0.1", 8002);
            InputStream is = s1.getInputStream();
            DataInputStream dos= new DataInputStream(is);
            System.out.println(dos.readUTF());
            dos.close();
            s1.close();
        }catch(Exception e){
            e.printStackTrace();
        }
    }

}

运行结果：

mytcpclint:

Hello,wrold!