java验证日期格式

写道
验证日期格式是否正确 
@SuppressWarnings("unused") 
private static boolean formateDate(String value){ 
//String value = "2007-02-2a"; 
String eL= "^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]? ((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))"; 
Pattern p = Pattern.compile(eL); 
Matcher m = p.matcher(value); 
boolean flag = m.matches(); 
return flag; 
}