网络编程_发送端的数据来自于键盘录入案例

秒速五厘米 2022-06-16 23:56 168阅读 0赞

package cn.itcast_04;
    
    import java.io.IOException;
    import java.net.DatagramPacket;
    import java.net.DatagramSocket;
    
    public class ReceiveDemo {
    	public static void main(String[] args) throws IOException {
    		// 创建接收端Socket对象
    		DatagramSocket ds = new DatagramSocket(12345);
    
    		while (true) {
    			// 创建接收数据包对象
    			byte[] bys = new byte[1024];
    			DatagramPacket dp = new DatagramPacket(bys, bys.length);
    
    			// 接收数据包
    			ds.receive(dp);
    
    			// 解析数据,并显示在控制台
    			String ip = dp.getAddress().getHostAddress();
    			String s = new String(dp.getData(), 0, dp.getLength());
    			System.out.println("from" + ip + " data is:" + s);
    		}
    		// 释放资源
    		// ds.close();
    	}
    }

package cn.itcast_04;
    
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.net.DatagramPacket;
    import java.net.DatagramSocket;
    import java.net.InetAddress;
    
    /*
     * 数据来自于键盘录入
     * 键盘录入要自已控制录入结束。
     */
    public class SedDemo {
    	public static void main(String[] args) throws IOException {
    		// 创建发送端Socket对象
    		DatagramSocket ds = new DatagramSocket();
    
    		// 封装键盘录入数据
    		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    		String line = null;
    		while ((line = br.readLine()) != null) {
    			if ("886".equals(line)) {
    				break;
    			}
    
    			// 创建数据,并打包
    			byte[] bys = line.getBytes();
    			// DatagramPacket dp = new DatagramPacket(bys, bys.length,
    			// InetAddress.getByName("192.168.31.165"), 12345);
    
    			DatagramPacket dp = new DatagramPacket(bys, bys.length,
    					InetAddress.getByName("192.168.31.255"), 12345);
    
    			// 发送数据
    			ds.send(dp);
    		}
    
    		// 释放资源
    		ds.close();
    
    	}
    }