正则表达式 记录

基础知识：
[url]http://blog.youkuaiyun.com/ambitiontan/archive/2005/12/21/558195.aspx[/url]

借鉴：
[url]http://www.iteye.com/topic/199489[/url]

按正则表达式过滤符合条件的文件或文件夹的工具类：
[url]http://blog.youkuaiyun.com/yinbaicheng/archive/2011/01/26/6164936.aspx[/url]


实践小例子：

public class DirList {

	/**
	 * 正则表达式 查询匹配文件
	 * @param args
	 */
	private static String filter = "[\\w]*.(txt)$";

	public static void main(String[] args) {
		File file = new File("D:\\00\\");
		String[] list = file.list(new DirFilter(filter));

		Arrays.sort(list,String.CASE_INSENSITIVE_ORDER);

		for(int i = 0; i < list.length; i++) {
			System.out.print(list[i]);
		}

	}

}

class DirFilter implements FilenameFilter {

	Pattern pat = null;
	public DirFilter (String filter) {
		pat = Pattern.compile(filter);
	}
	@Override
	public boolean accept(File dir, String name) {
		System.out.print(dir + "---" + name);
		return pat.matcher(name).matches();
	}

}