PathHelper.java

package guang.crawler.util;

import java.io.File;

/**
 * 帮助路径操作的实用类
 * 
 * @author sun
 *
 */
public class PathHelper {
	
	/**
	 * 获取路径的最后一个部分的名称,如/test/home将返回home
	 * 
	 * @param path
	 * @return
	 */
	public static String getName(String path) {
		while (path.endsWith("/")) {
			if ("/".equals(path)) {
				return path;
			}
			path = path.substring(0, path.length() - 1);
		}
		int pos = path.lastIndexOf('/');
		if (pos == -1) {
			return path;
		}
		String result = path.substring(pos + 1);
		return result;
		
	}
	
	/**
	 * 获取当前路径的父目录.
	 * 
	 * @param path
	 * @return
	 */
	public static String getParent(String path) {
		while (path.endsWith("/")) {
			if ("/".equals(path)) {
				return path;
			}
			path = path.substring(0, path.length() - 1);
		}
		int pos = path.lastIndexOf('/');
		if (pos == 0) {
			return "/";
		} else if (pos == -1) {
			return "";
		}
		String result = path.substring(0, pos);
		return result;
	}
	
	public static void main(final String[] args) {
		System.out.println(PathHelper.getParent("/test/../t////"));
		File file = new File("/test/../t/");
		System.out.println(file.getParent());
		System.out.println(PathHelper.getName("/test/../t////"));
		System.out.println(file.getName());
	}
}