PHP小丑 发表于 2021-11-22 13:19:32

Java网络编程UDP协议发送接收数据

这篇文章主要为大家详细介绍了Java网络编程UDP协议发送接收数据,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
本文实例为大家分享了Java网络编程UDP协议发送接收数据的具体代码,供大家参考,具体内容如下
UDP协议发送数据步骤
A:创建发送端socket对象;
B:创建数据,并把数据打包;
C:调用socket对象的发送方法发送数据包;
D:释放资源


package net;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class SendDemo {
public static void main(String[] args) throws IOException {
//A
DatagramSocket ds = new DatagramSocket();

//B
byte[] by = "Hello,UDP".getBytes();
int length = by.length;
InetAddress addr = InetAddress.getByName("192.168.1.22");
int port = 10010;
DatagramPacket dp = new DatagramPacket(by, length, addr, port);

//C
ds.send(dp);

//D
ds.close();

}
}
UDP协议接收数据步骤
A:创建接收端socket对象;
B:创建一个数据包(接收容器);
C:调用socket对象的接收方法接收数据;
D:解析数据,显示到控制台;
E:释放资源


package net;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class ReceiveDemo {
public static void main(String[] args) throws IOException {
//A
DatagramSocket ds = new DatagramSocket(10010);

//B
byte[] by = new byte;
int length = by.length;
DatagramPacket dp = new DatagramPacket(by, length);

//C
ds.receive(dp);

//D
//获取对方ip
InetAddress addr = dp.getAddress();
String ip = addr.getHostAddress();
byte[] by2 = dp.getData();
int len = by2.length;
String s = new String(by2, 0, len);
System.out.println(ip+"发送的数据是:"+s);

//E
ds.close();
}
}
先运行接收端代码,再运行发送端代码。
多次从键盘接收发送数据版本


package net;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class SendDemo {
public static void main(String[] args) throws IOException {
//A
DatagramSocket ds = new DatagramSocket();
//数据来自键盘录入
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line = null;
while((line = br.readLine()) != null){
   //当输入jieshu时,结束
   if("jieshu".equals(line)){
    break;
   }
   //B
   byte[] by = line.getBytes();
   int length = by.length;
   InetAddress addr = InetAddress.getByName("192.168.1.22");
   int port = 10010;
   DatagramPacket dp = new DatagramPacket(by, length, addr, port);
   
   //C
   ds.send(dp);
}
//D
ds.close();

}
}


package net;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;

public class ReceiveDemo {
public static void main(String[] args) throws IOException {
//A
DatagramSocket ds = new DatagramSocket(10010);
//多次接受版本
while(true){
   //B
   byte[] by = new byte;
   int length = by.length;
   DatagramPacket dp = new DatagramPacket(by, length);
   
   //C
   ds.receive(dp);
   
   //D
   //获取对方ip
   InetAddress addr = dp.getAddress();
   String ip = addr.getHostAddress();
   byte[] by2 = dp.getData();
   int len = by2.length;
   String s = new String(by2, 0, len);
   System.out.println(ip+"发送的数据是:"+s);
}

//E
//ds.close();
}
}
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持CodeAE代码之家。
原文链接:https://blog.csdn.net/weufengwangshi_/article/details/81608682

http://www.zzvips.com/article/206297.html
页: [1]
查看完整版本: Java网络编程UDP协议发送接收数据