deadthread.java

这个是由于项目需要

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import javax.swing.JOptionPane;
import javax.swing.JTextArea;


public class DeadThread implements Runnable
{
   String totalString;
   Mail mail=new Mail();
   String telephone;                                                                                                                                                                                                                                                                                                       
   String mailContent;
   public DeadThread(Mail mail)
   {
	   this.mail=mail;
   }
	public String ReadFile()
	{
		File file=new File("D:/mail.txt");
		int len=(int)file.length();
		byte [] buf=new byte[len];
		try
		{
			FileInputStream in=new FileInputStream(file);
			in.read(buf);
			in.close();
			
		}
		catch(IOException e)
		{
			JOptionPane.showMessageDialog(null,"读取文件mail.txt时出现错误！");
		}
		return new String(buf);
		
	}
  public void run()
   {
	  totalString=ReadFile();
	  while(true)
      {
   	   String tempString=ReadFile();
   	   if(tempString.contentEquals(totalString))
   	   {
   		   System.out.println("程序监测中");
   		   try
   		   {
   		   Thread.sleep(5000);
   		   }catch(InterruptedException e1)
   		   {}
   	   }
   	   else
   	   {
   		System.out.println("文件发生改变，群发短信");
   		totalString=ReadFile();
   		int len=totalString.length();
		int top=(int)Math.floor(len/70);
		DataConn conn=new DataConn();
		try
		{
			conn.SqlQuery("select * from friends");
			while(conn.rs.next())
			{
				int i;
				telephone=conn.rs.getString("telphone");
				for(i=0;i<top;i++)
				{
					mailContent=totalString.substring(i*70,i*70+70);
					mail.SendMail(telephone,mailContent);
				}
				mailContent=totalString.substring(i*70);
				mail.SendMail(telephone,mailContent);		
			}
		}
		catch(Exception e1)
		{
			JOptionPane.showMessageDialog(null,e1);
		}
   		   try
   		   {
   		   Thread.sleep(5000);
   		   }catch(InterruptedException e1)
   		   {}
   	   }
      }
   }
}