Java中验证日期时间格式

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class DateTimeCheck
{

    /**
     * 验证日期时间格式
     * @param args
     */
    public static void main(String[] args)
    {
        String checkValue = "2008-09-11 14:17:11";
        DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd HH:mm:ss");
        Date d = null;
        if(checkValue != null && !checkValue.equals(""))
        {
            if(checkValue.split("/").length > 1)
            {
                dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
            }
            if (checkValue.split("-").length > 1)
            {
                dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            }
        }else
        {
            return;
        }
        try
        {
            d = dateFormat.parse(checkValue);
            System.out.println(d);
        }
        catch(Exception e)
        {
            System.out.println("格式错误");
            return;
        }
        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]))))))(\\s(((0?[0-9])|([1-2][0-9]))\\:([0-5]?[0-9])((\\s)|(\\:([0-5]?[0-9])))))?$";
        Pattern p = Pattern.compile(eL); 
        Matcher m = p.matcher(checkValue); 
        boolean b = m.matches();
        if(b)
        {
            
            System.out.println("格式正确");
        }
        else
        {
            System.out.println("格式错误");
        }

    }
}