JAVA读取文件信息

package com.augurit.util;
import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
public class ReadFile {
    private static ArrayList<String> fileArr = new ArrayList<String>(); 
    
    public static void main(String[] args) {
        long startTime = System.currentTimeMillis();
        try {
        	readFile("C:\\test");
		} catch (Exception e) {
			e.printStackTrace();
		}
		 long endTime = System.currentTimeMillis();
        System.out.println("运行时间:" + (endTime - startTime) );
    }
    
    public static void readFile(String strPath) throws Exception { 
        File dir = new File(strPath); 
        File[] files = dir.listFiles(); 
        if (files == null) 
            return; 
        for (int i = 0; i < files.length; i++) { 
            if (files[i].isDirectory()) { 
            	readFile(files[i].getAbsolutePath()); 
            } else { 
                String strFileName = files[i].getAbsolutePath().toLowerCase();
                FileInputStream fis = null;
                fis = new FileInputStream(strFileName);
    			System.out.println(strFileName+" 的大小为:" + fis.available() + " bytes");
                fis.close();
                fileArr.add(files[i].getAbsolutePath());                    
            } 
        } 
    }
}