Display folders in a tree structure
Subject requirements: Write a program to display a specific folder and its subfolders in a tree structure on the command line. If the subfile is a file, you need to display the file size, and finally count the size of the entire directory
public class Test {
static long fileNum=0;
static long fileLen=0;
public static void main(String[] args) {
String ss="C:\\windows";
File ff=new File(ss);
if(ff != null && ff.exists()){
System.out.println(ff.getParent().getAbsolutePath());
showFile(ff,0);
}
System.out.println(ff.getAbsolutePath()+"的文件数目为："+fileNum+",总大小 为："+fileLen);
}
public static void showFile(File ff,int level) {
if(ff != null) {
for(int i = 0;i<level;i++)
System.out.print(" ");
System.out.print("|-");
if(ff.isFile()) {
fileNum++;
fileLen+=ff.length();
System.out.println(ff.getName()+":"+ff.length());
}else if(ff.isDirectory()) {
System.out.println(ff.getName());
File[] fs=ff.listFiles();
for(File temp:fs)
showFile(temp, level+1);
}
}
}
}