正则表达式 记录

基础知识：
http://blog.csdn.net/ambitiontan/archive/2005/12/21/558195.aspx

借鉴：
http://www.iteye.com/topic/199489

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


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();
	}
	
}