java_网络基础编程

InetAddress 类

package API_;

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @author ZhouHao
 * @version 1.0
 * @ 思路分析:
 */
public class Api_demo {
    public static void main(String[] args) throws UnknownHostException {
//        一、获取本机的对象  返回本机名，和本机的ip地址
        InetAddress localHost = InetAddress.getLocalHost();
        System.out.println(localHost+"~~~");
//        二、根据指定的主机名，获取对应的对象名
        InetAddress ByName = InetAddress.getByName("DESKTOP-I7BM4JK");
        System.out.println(ByName);
//        三、根据域名返回指定的ip地址
        InetAddress byName = InetAddress.getByName("www.xn--zsru59c.top");
        System.out.println(byName);
//        四、通过对应的对象 获取该ip地址
        String hostAddress = byName.getHostAddress();
        System.out.println(hostAddress);
//        五、通过对象获取对用的主机名 、 域名
        String hostName = byName.getHostName();
        System.out.println(hostName);
    }
}

Socket

TCP字节流编程 客户端

package TCP;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * @author ZhouHao
 * @version 1.0
 * 成为想成为的人
 */
public class TCP_client_demo {
    public static void main(String[] args) throws IOException {
        Socket socket=new Socket(InetAddress.getLocalHost(),9999);
        OutputStream os = socket.getOutputStream();
        os.write("hello,server".getBytes());
//        注意一定要写入结束标记
        socket.shutdownOutput();

        InputStream is = socket.getInputStream();
        byte[] by=new byte[1024];
        int count;
        while ((count=is.read(by))!=-1){
            System.out.print(new String(by,0,count));
        }

        socket.close();
        os.close();

    }
}

TCP字节流编程 服务端

package TCP;

import com.sun.corba.se.impl.encoding.CDROutputStream_1_0;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * @author ZhouHao
 * @version 1.0
 * 成为想成为的人
 */
public class TCP_server_demo {
    public static void main(String[] args) throws IOException {
//        服务端在9999端口监听
        ServerSocket serverSocket=new ServerSocket(9999);
//        程序在这里阻塞，当有程序连接时 会返回一个socke对象
        Socket socket = serverSocket.accept();
//        读取客服端发送的数据
        InputStream is_ = socket.getInputStream();
        byte[] buf=new byte[1024];
        int count;
        while ((count=is_.read(buf))!=-1){
            System.out.print(new String(buf,0,count));
        }

//        回复客户端读取的数据
        OutputStream os_=socket.getOutputStream();
        os_.write("hello,client".getBytes());
//        注意一定要写入结束标记
        socket.shutdownOutput();
//        关闭流 ，释放资源
        socket.close();
        serverSocket.close();
        is_.close();
        os_.close();
    }
}