判断字符串是不是日期格式

/**

* 判断字符串是不是日期格式

*

* @return

*/

public static String checkDate(String IDCard) throws ParseException{

String errorInfo = "";//错误信息

String[] ValCodeArr = { "1", "0", "X", "9", "8", "7", "6", "5", "4","3", "2" };

String[] Wi = { "7", "9", "10", "5", "8", "4", "2", "1", "6", "3", "7","9", "10", "5", "8", "4", "2" };

String str = "";

// ================ 号码的长度 15位或18位 ================

if (IDCard.length() != 15 && IDCard.length() != 18) {

errorInfo = "身份证号码长度应该为15位或18位。";

return errorInfo;

}

//================ 数字 除最后以为都为数字 ================

if (IDCard.length() == 18) {

str = IDCard.substring(0, 17);

} else if (IDCard.length() == 15) {

str = IDCard.substring(0, 6) + "19" + IDCard.substring(6, 15);

}

if (isNumber(str) == false) {

errorInfo = "身份证15位号码都应为数字 ; 18位号码除最后一位外，都应为数字。";

return errorInfo;

}

// ================ 出生年月是否有效 ================

String strYear = str.substring(6, 10);// 年份

String strMonth = str.substring(10, 12);// 月份

String strDay = str.substring(12, 14);// 月份

if (isDataFormat(strYear + "-" + strMonth + "-" + strDay) == false) {

errorInfo = "身份证生日无效。";

return errorInfo;

}

GregorianCalendar gc = new GregorianCalendar();

SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd");

if ((gc.get(Calendar.YEAR) - Integer.parseInt(strYear)) > 150

|| (gc.getTime().getTime() - s.parse(

strYear + "-" + strMonth + "-" + strDay).getTime()) < 0) {

errorInfo = "身份证生日不在有效范围。";

return errorInfo;

}

if (Integer.parseInt(strMonth) > 12 || Integer.parseInt(strMonth) == 0) {

errorInfo = "身份证月份无效";

return errorInfo;

}

if (Integer.parseInt(strDay) > 31 || Integer.parseInt(strDay) == 0) {

errorInfo = "身份证日期无效";

return errorInfo;

}

int TotalmulAiWi = 0;

for (int i = 0; i < 17; i++) {

TotalmulAiWi = TotalmulAiWi

+ Integer.parseInt(String.valueOf(str.charAt(i)))

* Integer.parseInt(Wi[i]);

}

int modValue = TotalmulAiWi % 11;

String strVerifyCode = ValCodeArr[modValue];

str = str + strVerifyCode;

if (IDCard.length() == 18) {

if (str.equals(IDCard) == false) {

errorInfo = "身份证无效，不是合法的身份证号码";

return errorInfo;

}

} else {

return "";

}

return "";

}

public static boolean isDataFormat(String str){

boolean flag=false;

String regxStr="^((\\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]))))))(\\s(((0?[0-9])|([1-2][0-3]))\\:([0-5]?[0-9])((\\s)|(\\:([0-5]?[0-9])))))?$";

Pattern pattern1=Pattern.compile(regxStr);

Matcher isNo=pattern1.matcher(str);

if(isNo.matches()){

flag=true;

}

return flag;

}

/**

* 判断字符串是否为数字

* @param str

* @return

*/

private static boolean isNumber(String str) {

Pattern pattern = Pattern.compile("[0-9]*");

Matcher isNum = pattern.matcher(str);

if (isNum.matches()) {

return true;

} else {

return false;

}

}