URL 和 UDP 测试

1.URL


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import java.net.URL;

public class Test_URL {
public static void main(String[] args) throws IOException, InterruptedException {
URL url = new URL("http://baike.baidu.com/link?url=hVrK2miCNIiQlMrxwDWcZCsjJGTyoLGL6hYsFq-5znHSv07Dm6qkgsgplTqmvOZw1rACIx3EEQRHzAm7o83cm_");
System.out.println("URL："+url.toString()+"\n"
+"协议："+url.getProtocol()+"\n"
+"域名："+url.getHost()+"\n"
+"端口："+(url.getPort()==-1? 80:url.getPort())+"\n"
+"资源："+url.getFile()+"\n"
+"锚点："+url.getRef()+"\n"
+"参数："+url.getQuery()+"\n" //若锚点存在，则返回null
+"相对路径："+url.getPath());
Thread.sleep(3000);
BufferedReader br =new BufferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("test/www.html"), "UTF-8"));
String msg = null;
while(null!=(msg=br.readLine())){
System.out.println(msg);
bw.append(msg);
bw.newLine();
}
bw.flush();
bw.close();
br.close();
}
}
2.UDP

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

public class Test_UDP {

public static class Server implements Runnable {
	
	public void run() {
		try {
			DatagramSocket server;
			server = new DatagramSocket(3333);
			byte[] container = new byte[1024];
			DatagramPacket packet = new DatagramPacket(container, container.length);
		    server.receive(packet);
			byte[] data = packet.getData();
			int len = packet.getLength();
			System.out.println("服务器已接受信息");
			Thread.sleep(800);
			System.out.println("信息："+new String(data, 0, len));
			server.close();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}
}
public static class Client implements Runnable {
	
	public void run() {
		try {
			DatagramSocket client  = new DatagramSocket(5555);
			String msg = "udp测试成功！";
			byte[] data = msg.getBytes();
			DatagramPacket packet = new DatagramPacket(data, data.length, new InetSocketAddress("myLaptop", 3333));
			client.send(packet);
			client.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

public static void main(String[] args) throws IOException, InterruptedException {	
	new Thread(new Server()).start();
	System.out.println("服务器接收就绪");
	Thread.sleep(1600);
	System.out.print("客户端正在发送信息");
	for(int i=0; i<3; i++){
		Thread.sleep(400);
		System.out.print(".");
	}
	System.out.println();
	Thread.sleep(1200);
	new Thread(new Client()).start();
}

}