柚子快報(bào)邀請(qǐng)碼778899分享：網(wǎng)絡(luò) UDP編程：

http://yzkb.51969.com/

具體使用packet和socket完成

1.DatagramSocket與DatagramPacket

2.創(chuàng)建發(fā)送端，接收端

3.創(chuàng)建數(shù)據(jù)報(bào)，用于存儲(chǔ)數(shù)據(jù)

4.調(diào)用Socket的發(fā)送，接受方法

5.關(guān)閉Socket

發(fā)送端和輸出端是兩個(gè)獨(dú)立的運(yùn)行程序：

發(fā)送端：

public class send {

public static void main(String[] args) {

try{

DatagramSocket datagramSocket= new DatagramSocket();

byte[] bytes="你好接收端".getBytes();//發(fā)送的數(shù)據(jù)

//封裝一個(gè)數(shù)據(jù)報(bào)

DatagramPacket datagramPacket= new DatagramPacket(bytes,0,bytes.length,InetAddress.getByName("186.192.153.144"),5555);

//引號(hào)內(nèi)數(shù)字是電腦的地址，后面數(shù)字則是輸出和接收兩端匹配的密碼

datagramSocket.send(datagramPacket);

datagramSocket.close();

} catch (SocketException e) {

e.printStackTrace();

}catch(UnknownHostException e){

e.printStackTrace();

}catch(IOException e){

e.printStackTrace();

}

}}

接收端：

public static void main(String[] args) {

try {

ServerSocket serverSocket=new ServerSocket(5555);

System.out.println("服務(wù)器啟動(dòng)成功");

Socket socket = serverSocket.accept();

System.out.println("有客戶連接到了服務(wù)器");

InputStream inputstream= socket.getInputStream();

DataInputStream dataInputstream = new DataInputStream(inputstream);

String s = dataInputstream.readUTF() ;

System.out.println("客戶端說(shuō):"+s);

OutputStream outputstream = socket.getOutputStream();

DataOutputStream dataOutputStream = new DataOutputStream(outputstream);

Scanner scanner=new Scanner(System.in);

System.out.println("服務(wù)器端輸入:");

String s1 = scanner.next();

dataOutputStream.writeUTF(s1);

} catch (IOException e) {

e.printStackTrace();

System.out.println("服務(wù)器啟動(dòng)失敗,端口被占用");

}

}

柚子快報(bào)邀請(qǐng)碼778899分享：網(wǎng)絡(luò) UDP編程：

http://yzkb.51969.com/

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