【Java】输出目录结构

 import java.io.*;
 import java.io.File;
 import java.io.IOException;
 
 public class FileUtil {
 
     public static void main( String[] args ) throws IOException {
 
         BufferedReader buffReader = new BufferedReader( new
                                         InputStreamReader( System.in ) );
 
         System.out.println("input dir::");
 
         String str = buffReader.readLine();
 
         showDir( 1, new File(str) );
     }
 
     static void showDir( int idx, File file ) throws IOException {
         for( int i = 0; i < idx; i++ ) {
             System.out.print('-');
         }
 
         System.out.println( file.getName() );
 
         if( file.isDirectory() ) {
             File[] files = file.listFiles();
             //System.out.print('|');
             for( int j = 0; j < files.length; j++ ) {
                 showDir( idx+4, files[j]);
             }
         }
     }
 }