不说别的直接上代码。

try{
    Process   p   =   Runtime.getRuntime().exec("cmd /c dir c:\\db2jcc.jar");  
      
             InputStream   is   =   p.getInputStream();  
             BufferedReader   br   =   new   BufferedReader(new   InputStreamReader(is));  
             String   result;  
             String   getTime   =   null;  
             while   ((result   =   br.readLine())   !=   null)   {  
                     if(result.endsWith("db2jcc.jar"))   {  
                             getTime   =   result.substring(0,11);  
                             break;  
                     }  
             }  
             System.out.println("file create time is "+getTime);    
       
  }
  catch (Exception e)
  {
   System.out.println(e.toString());
  }