我有以下UDP客户端和服务器类,并且我试图从UDPClient
向本地主机和端口上的相同java项目中的另一个类“UDPServer”发送一些字符串7777.我面临的问题是,我没有从UDPClient类的UDPServer类中收到任何内容。有没有人有问题的地方?UDPServer未收到来自UDPClient的发送数据
我感谢任何帮助!
UDPClient
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
class UDPClient {
public static void main(String args[]) throws Exception {
String aString = "Hello World";
DatagramSocket clientSocket = new DatagramSocket();
InetAddress IPAddress = InetAddress.getByName("localhost");
byte[] sendData = new byte[1024];
byte[] receiveData = new byte[1024];
sendData = aString.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, 7777);
clientSocket.send(sendPacket);
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
clientSocket.receive(receivePacket);
String modifiedSentence = new String(receivePacket.getData());
System.out.println("FROM SERVER:" + modifiedSentence);
clientSocket.close();
}
}
UDPServer
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
class UDPServer {
public static void main(String args[]) throws Exception {
DatagramSocket serverSocket = new DatagramSocket(7777);
byte[] receiveData = new byte[1024];
byte[] sendData = new byte[1024];
while (true) {
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
serverSocket.receive(receivePacket);
String sentence = new String(receivePacket.getData());
System.out.println("RECEIVED: " + sentence);
InetAddress IPAddress = receivePacket.getAddress();
int port = receivePacket.getPort();
String capitalizedSentence = sentence.toUpperCase();
sendData = capitalizedSentence.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
serverSocket.send(sendPacket);
}
}
}
数据报服务器上的任何异常? – thepaulo
@Sonor否我没有收到任何错误或任何异常。 – water
代码似乎在我的机器上按预期工作 – scsere