本文介绍了在UDP数据报中发送的消息未经过清理?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的代码如下.一切都按我想要的方式工作,但是收到我的消息后,它们的末尾都有许多框,就像这样的消息:你好▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀"我该怎么做,所以接收和打印的只是消息:你好"?非常感谢您的帮助.
My code is as follows. Everything works the way I want it to, but when my messages are received they have many boxes on the end somewhat like this like this "Message: hello▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀" How can I make it so what is received and printed is only "Message: hello"? I greatly appreciate any help.
import java.io.*;
import java.net.*;
public class UDPChat {
public static void main(String args[]) throws Exception {
new UDPChat();
}
public UDPChat() {
try {
runChat();
} catch (Exception e) {
}}
public void runChat() throws InterruptedException {
Sender sender = new Sender();
Receiver receiver = new Receiver();
sender.start();
receiver.start();
sender.join();
receiver.join();
}
class Receiver extends Thread {
public void run() {
try {
DatagramSocket serverSocket = new DatagramSocket(9876);
byte[] receiveData = new byte[1024];
while (true) {
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
serverSocket.receive(receivePacket);
String sentence = new String(receivePacket.getData());
System.out.println("Message: " + sentence);
}
} catch (IOException e) {
}
}
}
class Sender extends Thread {
public void run() {
try {
DatagramSocket clientSocket = new DatagramSocket();
InetAddress IPAddress = InetAddress.getByName("localhost");
byte[] sendData = new byte[1024];
while (true) {
BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
String message = inFromUser.readLine();
sendData = message.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, 9876);
clientSocket.send(sendPacket);
}
} catch (IOException e) {
}
}
}
}
推荐答案
String sentence = new String(receivePacket.getData());
常见问题.忽略数据报长度.修复如下:
Usual problem. Ignoring the datagram length. Fix as follows:
String sentence = new String(receivePacket.getData(), receivePacket.getOffset(), receivePacket.getLength());
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