java---06

来源：互联网发布：淘宝心愿单有什么用编辑：程序博客网时间：2024/06/06 09:11
1. 定时向文档传输数据：package project2;import java.io.FileWriter;import java.io.IOException;import java.util.Date;import java.util.Timer;public class MyTimeTask02 {public static void main(String[] args) throws Exception {FileWriter f = new FileWriter("F:/test/111.txt");Timer t = new Timer();    MyTimeTaskDemo task=new MyTimeTaskDemo(f);t.scheduleAtFixedRate(task,new Date(), 3000);}}package project2;import java.io.FileWriter;import java.io.IOException;import java.util.TimerTask;public class MyTimeTaskDemo extends TimerTask {   FileWriter f ;      public MyTimeTaskDemo(FileWriter f) {this.f = f;}public void run() {try {f.write("zaizai");f.flush();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}2 定时给客户端发送数据package project;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;import java.net.SocketException;public class MyReceiveDemo {public static void main(String[] args) throws IOException {//创建一个收货快递员！DatagramSocket ds = new DatagramSocket(10089);while(true){//快递员创建一个数据包以便接收数据！byte[] buf  =new byte[1024];int length = buf.length;DatagramPacket dp = new DatagramPacket(buf, length);//快递员接收包裹！ds.receive(dp);//快递员确认包裹的ipInetAddress address = dp.getAddress();String ip = address.getHostAddress();//快递员拆开包裹显示数据！byte[] bufs = dp.getData();int lengths = dp.getLength();String s = new String (bufs,0,lengths);System.out.println(ip+"----"+s);}}}package cn.mashen.timetask;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;import java.net.InetAddress;import java.net.SocketException;import java.net.UnknownHostException;import java.util.Date;import java.util.TimerTask;public class MyTimerTask extends TimerTask {// 快递员将数据打包！DatagramSocket ds;public MyTimerTask(DatagramSocket ds) {this.ds = ds;}public void run() {byte[] buf = "shengzai".getBytes();int length = buf.length;InetAddress address = null;try {address = InetAddress.getByName("192.168.11.44");} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();}int port = 10089;DatagramPacket dp = new DatagramPacket(buf, length, address, port);// 快递员发送数据包裹！try {ds.send(dp);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}package cn.mashen.timetask;import java.io.IOException;import java.net.DatagramSocket;import java.net.SocketException;import java.util.Date;import java.util.Timer;public class MainTimerTask {public static void main(String[] args) throws IOException {DatagramSocket ds=new DatagramSocket();MyTimerTask task=new MyTimerTask(ds);Timer timer = new Timer();timer.scheduleAtFixedRate(task, new Date(), 2000);}}
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