利用 Java 怎样读取xls和doc文件的创建时间。高人指点。

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;public class fileLoad {

public static void main(String[] args) throws Exception{
String delpath="D:\\Program Files\\apache-tomcat-6.0.20\\webapps\\workorder\\fileStorage\\documentItemStorage\\X0090241";
deletefile(delpath);
}
public static void   deletefile(String   delpath)   {
    File   file   =   new   File(delpath);   
    if   (!file.isDirectory())   { 
        //file.delete();   
    }
    else   if   (file.isDirectory())   {   
        String[]   filelist   =   file.list();   
        for   (int   i   =   0;   i   <   filelist.length;   i++)   {   
        
//             File   delfile   =   new   File(delpath   +   "\\\\\\\\"   +   filelist[i]);   
//             if   (!delfile.isDirectory())   
//                delfile.delete();   
//             else   if   (delfile.isDirectory())              System.out.print( filelist[i]);
          getCreateTime(delpath+"\\"+"0107.XLS");
         System.out.println("my printer-----"+(delpath+"\\"+"0107.XLS").toString());
          
          
                deletefile(delpath   +   "\\\\\\\\"   +   filelist[i]);   
               
        }   
       // file.delete();   
    }   
}   

public static void getCreateTime(String filePath){   
       // String filePath = "C:\\test.txt";   
        String strTime = null;   
        try {   
            Process p = Runtime.getRuntime().exec("cmd /C dir "            
                    + filePath   
                    + "/tc" );   
            InputStream is = p.getInputStream();    
            BufferedReader br = new BufferedReader(new InputStreamReader(is));              
            String line;   
            while((line=br.readLine()) != null){  //这里开始就跳出了。结果strTime为null.高人指点。
            
                if(line.endsWith(".doc")){   
                    strTime = line.substring(0,17);   
                    break;   
                } 
                else if(line.endsWith(".XLS")){   
                    strTime = line.substring(0,17);   
                    break;   
                }                              
             }    
        } catch (IOException e) {   
            e.printStackTrace();   
        }          
        System.out.println("创建时间    " + strTime);      
        //输出：创建时间   2009-08-17  10:21   
    }   
}