【Java】输出目录结构

 1 import java.io.*; 
 2 import java.io.File;
 3 import java.io.IOException;
 4 
 5 public class FileUtil {
 6     
 7     public static void main( String[] args ) throws IOException {
 8         
 9         BufferedReader buffReader = new BufferedReader( new 
10                                         InputStreamReader( System.in ) );
11         
12         
13         System.out.println("input dir::");
14         
15         String str = buffReader.readLine();
16 
17         showDir( 1, new File(str) );
18     }
19     
20     static void showDir( int idx, File file ) throws IOException {
21         for( int i = 0; i < idx; i++ ) {
22             System.out.print('-');
23         }
24             
25         System.out.println( file.getName() );
26         
27         if( file.isDirectory() ) {
28             File[] files = file.listFiles();
29             //System.out.print('|');
30             for( int j = 0; j < files.length; j++ ) {
31                 showDir( idx+4, files[j]);
32             }
33         }
34     }
35 }