JAVA手机控制电脑关机

我们用javamail实现                                 

看代码

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.io.*;

public class POPMail2
{
 public static void main(String args[])
 {
  try{
                        String popServer="pop3.sohu.com";//邮箱服务器，可自己更改
   String popUser="********";//***是代表你邮箱的帐号
   String popPassword="***";//你邮箱的密码
   receive(popServer,popUser,popPassword);
  }
  catch(Exception e){
   System.out.println(e);
  }
  System.exit(0);
 }
 public static void receive(String popServer,String popUser,String popPassword)
 {
  Store store=null;
  Folder folder=null;
  try{
   //get session
   Properties props=System.getProperties();
   Session session=Session.getDefaultInstance(props,null);
   //use pop3 to connect the server
   store = session.getStore("pop3");
   store.connect(popServer,popUser,popPassword);
   //get default file
   folder =store.getDefaultFolder();
   if(folder == null) throw new Exception("no default folder");
   //if is inbox
   folder=folder.getFolder("INBOX");
   if(folder == null) throw new Exception("no pop3 inbox");
   //use read_only method to open the inbox
   folder.open(Folder.READ_ONLY);
   //get file information ,get mail list
   Message[] msgs=folder.getMessages();
//   for(int msgNum=0;msgNum<msgs.length;msgNum++)
//    printMessage(msgs[msgNum]);
          int t=msgs.length;
          System.out.println("当前有"+msgs.length+"封邮件");
          if(folder!=null) folder.close(false);
   if(store!=null) store.close();
          while(true)
          {
/**/      folder.open(Folder.READ_ONLY);
          msgs=folder.getMessages();
          System.out.println("现在有"+msgs.length+"封邮件");
          if(msgs.length>t)
          {
           t++;
           System.out.println("有新邮件到达");
           printMessage(msgs[msgs.length-1]);//只读取最顶端的信
           if(folder!=null) folder.close(false);
    if(store!=null) store.close();
          // break;
          }
          else
          {
           System.out.println("没有新邮件到达");
           if(folder!=null) folder.close(false);
   if(store!=null) store.close();
           Thread.sleep(10000);    
          }

          }
  }catch(Exception e){
   e.printStackTrace();
  }
  finally
  {
   try{
    if(folder!=null) folder.close(false);
    if(store!=null) store.close();
   }catch(Exception e){
    e.printStackTrace();
   }
  }
 }
 public static void printMessage(Message message){
  try{
   //get mail address
   String from=((InternetAddress)message.getFrom()[0]).getPersonal();
   if(from==null) from=((InternetAddress)message.getFrom()

[0]).getAddress();
   System.out.println("邮件来自于: "+from);
   String subject=message.getSubject();
   System.out.println("邮件主题是: "+subject);
            if(subject.compareTo("shutdown")==0)
   {
    System.out.println("发现shutdown命令，调用系统命令

shutdown");
    String cmd="shutdown -s -t 300";
               //如需多个参数，可以改成String[]cmd,然后cmd[i]放置命令参数。
                Runtime rt = Runtime.getRuntime();
                Process proc = rt.exec(cmd);
          }
  }catch(Exception e)
  {
   e.printStackTrace();
  }
  
  
 }
}