遍历文件目录

import java.io.File;

public class FileUtil {


    private static final boolean String = false;

    public static void listDirectory(File dir)
    {
        if( !dir.exists())
        {
            throw new IllegalArgumentException("Directory:" + dir + "does not exist !!");
            
        }
        if( !dir.isDirectory())
        {
            throw new IllegalArgumentException("Directroy" + dir + "is not a directory !!");
        }

        String[] filenames =dir.list();
        
        File[] files = dir.listFiles();
        
        if(files != null && files.length > 0)
        {
            for(File file : files)
            {
                if(file.isDirectory())
                {
                    listDirectory(file);
                }
                else
                {
                    System.out.println(file);
                }
                
//                System.out.println(file);
            }
        }
        

        System.out.println();
        

        for(String s:filenames)
        {
            System.out.println( dir + File.separator + s);
        }
    }
}


import java.io.File;

public class FileUtilTest {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        FileUtil.listDirectory(new File("C:\\testDir"));

    }

}

Console结果

C:\testDir\test\test.txt


C:\testDir\test\test.txt
C:\testDir\test\testtest
C:\testDir\test.txt
C:\testDir\testDemo.txt

C:\testDir\test
C:\testDir\test.txt
C:\testDir\testDemo.txt