校验日期格式{YYYY-MM_DD的java代码

String eL = "[0-9]{4}-[0-9]{2}-[0-9]{2}";
		Pattern p = Pattern.compile(eL);
		Matcher m = p.matcher(date);
		boolean dateFlag = m.matches();
		if (!dateFlag) {
			System.out.println("格式错误");
		}
		System.out.println("格式正确");