java 判斷字符串是否爲日期格式

import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
     * 功能：判斷字符串是否爲日期格式
     * 
     * @param str
     * @return
     */
    public static boolean isDate(String strDate) {
        Pattern pattern = Pattern
                .compile("^((\\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])))))?$");
        Matcher m = pattern.matcher(strDate);
        if (m.matches()) {
            return true;
        } else {
            return false;
        }
    }

 用正則檢查某特定格式是否正確

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class DataTest {

    public static void main (String [] args){

        String str = "2007-10-02";

        String regex = "[0-9]{4}-[0-9]{2}-[0-9]{2}";
        Pattern pattern = Pattern.compile(regex);
        Matcher m = pattern.matcher(str);
        boolean dateFlag = m.matches();
        if (!dateFlag) {
            System.out.println("格式錯誤");
            return ;
        }
        DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); 
        formatter.setLenient(false);
        try{  
            Date date = formatter.parse(str);  
            System.out.println(date);
            System.out.print("格式正確！");
        }catch(Exception e){
            System.out.println("格式錯誤！");
        }
    }
}