删除指定目录下的文件

public static boolean ifFilesInDir(String dir,String fileName){
   File file = new File(dir);
   boolean rs = false;
   List<String> files =new ArrayList<String>(); 
   File[] tempList = file.listFiles();
   for(int i =0;i<tempList.length;i++){
      if (tempList[i].isFile()) {
         String name = tempList[i].getAbsolutePath();
          String name2 = tempList[i].getName();
          System.out.println(name2);
          String a = name.split("\\\\")[2];         
          files.add(a);
         }
   }     
   for(String name:files){
      if(name.contains(fileName)){
          rs = true;
      }
   }
   return rs;
}

public static void delectFiles(String dir){
   File file = new File(dir);
   if(file.isDirectory()){
       String[] children = file.list();
               for (int i=0; i<children.length; i++) {
                  //System.out.println(children[i]);
                  try {
                     new File(file,children[i]).delete();
               } catch (Exception e) {
                  System.out.println(e);
               }
               } 
   }
}