递归列出文件树

private static void tree(File f,int level){
  String preStr = "";
  for (int i = 0; i < level; i++) {
   preStr+="   ";
  }
  
  File [] childs = f.listFiles();
  for (int i = 0; i < childs.length; i++) {
   System.out.println(preStr+childs[i].getName());
   if(childs[i].isDirectory()){
    tree(childs[i],++level);
   }
  }
 }

递归列出文件树

原文：http://www.cnblogs.com/oraclespace/p/3983443.html