import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;

/**
 * @author Y 2010/04/01 23:39
 */
public class ShutDown {
 // easyMule下downloads.txt文件的路径
 public static final String FILEPATH = “D:\\Program Files\\easyMule\\downloads.txt”;

 // 查找下载记录数的关键字
 public static final String KEYWORD = “ed2k://|file|”;

 // 刷新读入downloads.txt的时间(秒)
 int second = 5;

 // 下载完成后关机的延迟时间(秒)
 int times = 5000;

 // 需要监视的文件id号
 int id;

 // 监视的文件名称
 String fileName;

 public ShutDown() {
  System.out.println(“当前的下载文件信息为:”);
  System.out
    .println(“————————————————————–”);
  showFile(readText(FILEPATH, KEYWORD));
  System.out
    .println(“————————————————————–”);
  System.out.println(“要等哪个文件下载完成关闭计算机?”);
  Scanner scan = new Scanner(System.in);
  id = scan.nextInt() – 1;
  fileName = (String) readText(FILEPATH, KEYWORD).get(id);
  System.out.println(“监视的文件是:” + fileName);
  while (countDown(second)) {

   if (readText(FILEPATH, fileName).size() == 0) {
    shutDownComputer(times);
    System.out.println(“计算机将在” + times + “秒内关闭”);
    System.out.println(“输入任意内容可取消关闭计算机”);
    if (null != scan.next()) {
     unShutDownComputer();
    }
    break;
   }
  }
 }

 // 利用线程休眠进行倒计时
 public boolean countDown(int second) {
  for (int i = second; i >= 0; i–) {
   try {
    Thread.sleep(1000);
    if (i == 0) {
     return true;
    }
   } catch (InterruptedException e) {
    e.printStackTrace();
   }
  }
  return false;
 }

 public boolean toSearchWord() {

  return false;
 }

 // 读取文件,查找下载的条目,返回List集合
 public List readText(String filePath, String searchWord) {
  List list = new ArrayList();
  File file = new File(filePath);
  InputStreamReader reader = null;
  BufferedReader br = null;
  try {
   // downloads.txt文件采用Unicode编码,需要转码
   reader = new InputStreamReader(new FileInputStream(file), “utf-16″);
   br = new BufferedReader(reader);
   String s1 = null;
   while ((s1 = br.readLine()) != null) {
    int position = s1.indexOf(searchWord);
    if (position != -1) {
     s1 = s1.substring(0, position).trim();
     list.add(s1);

    }
   }
  } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   try {
    br.close();
    reader.close();
   } catch (IOException e) {
    e.printStackTrace();
   }

  }

  return list;

 }

 // 查看当前下载的记录数
 public void showFile(List list) {
  Iterator iter = list.iterator();
  int count = 1;
  while (iter.hasNext()) {
   System.out.println(count + “=>” + iter.next());
   count++;
  }
 }

 // 关闭计算机
 public void shutDownComputer(int times) {
  Runtime run = Runtime.getRuntime();
  try {
   run.exec(“shutdown -s -t” + ” ” + times);
  } catch (IOException e) {
   e.printStackTrace();
  }
 }

 // 取消关闭计算机
 public void unShutDownComputer() {
  Runtime run = Runtime.getRuntime();
  try {
   run.exec(“shutdown -a”);
  } catch (IOException e) {
   e.printStackTrace();
  }
 }

 public static void main(String[] args) {
  new ShutDown();

 }

}