batch.java

遍历指定文件夹下的某种文件。可以对WINDOWS下的文件夹进行遍历

import java.io.File;
import java.util.Vector;

/**
 * 遍历指定文件夹下的某种文件。
 * @author wuqingnan
 * 2008-12-26
 */
public class Batch implements Runnable{
	
	private String path;
	private String filter;
	private boolean isCompleted;
	private Vector<String> fileNames;
	
	public Batch(String path, String filter){
		this.path = path;
		this.filter = filter;
		this.isCompleted = false;
		new Thread(this).start();
	}

	@Override
	public void run() {
		setFileNames(traversalDirectory(path, filter));
		setCompleted(true);
	}
	
	/**
	 * 遍历目录path下，所有后缀为filter的文件
	 * @param path 所要遍历的目录
	 * @param filter 所要查找的文件后缀
	 * @return 返回目录下所有后缀为filter的文件路径
	 */
	private Vector<String> traversalDirectory(String path, String filter){
		Vector<String> fileNames = new Vector<String>();
		File file = new File(path);
		if(!file.exists()){
			System.out.println("您输入的目录不存在！");
			return fileNames;
		}
		else{
			if(!file.isDirectory()){
				System.out.println("您输入的目录不存在！");
			}
			else{
				File[] subFiles = file.listFiles();
				for(int i = 0; i < subFiles.length; i++){
					if(subFiles[i].isDirectory()){
						Vector<String> subFileNames = traversalDirectory(subFiles[i].getPath(), filter);
						for(int j = 0; j < subFileNames.size(); j++){
							fileNames.addElement(subFileNames.elementAt(j));
						}
					}
					else{
						if(subFiles[i].getPath().endsWith(filter)){
							fileNames.addElement(subFiles[i].getPath());
						}
					}
				}
			}
		}	
		return fileNames;
	}
	
	public void setFileNames(Vector<String> fileNames){
		this.fileNames = fileNames;
	}
	
	public Vector<String> getFileNames(){
		return this.fileNames;
	}
	
	public boolean isCompleted() {
		return isCompleted;
	}

	public void setCompleted(boolean isCompleted) {
		this.isCompleted = isCompleted;
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// 执行遍历目录
		long startTime = System.currentTimeMillis();
		System.out.println("程序开始运行！当前时间：" + startTime);
		String path = "D:\\workspace";	//要遍历的目录
		String filter = ".txt";		//要遍历的文件类型
		Vector<String> fileNames;	//返回满足条件的文件路径
		
		Batch batch = new Batch(path, filter);
		while(!batch.isCompleted()){
			try {
				Thread.currentThread().sleep(100);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		fileNames = batch.getFileNames();
		for(int i = 0; i < fileNames.size(); i++){
			System.out.println(fileNames.elementAt(i));
		}
		long endTime = System.currentTimeMillis();
		long time = (endTime - startTime) / 1000;
		int second = (int)time % 60;
		int minute = (int)(time / 60) % 60;
		int hour = (int)(time / 3600);
		System.out.println("程序运行结束！当前时间：" + endTime);
		System.out.println("程序运行过程中共历时：" + hour + "小时" + minute + "分" + second + "秒");
	}
}