Javaはランダムな日付を生成します。

http://blog.csdn.net/opnmzxcvb/article/details/3970683

public class DateRandomTest {  
	  
	    //   2007-01-01 2007-03-01         
	    public static void main(String[] args) {  
	        Date randomDate = randomDate("2007-01-01", "2007-03-01");  
	        System.out.println(randomDate.toString());  
	    }  
	  
	    /** 
	     *        
	     *  
	     * @param beginDate 
	     *                ，   ：yyyy-MM-dd 
	     * @param endDate 
	     *                ，   ：yyyy-MM-dd 
	     * @return 
	     */  
	  
	    private static Date randomDate(String beginDate, String endDate) {  
	        try {  
	            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");  
	            Date start = format.parse(beginDate);//         
	            Date end = format.parse(endDate);//         
	            // getTime()      1970   1   1   00:00:00 GMT     Date         。  
	            if (start.getTime() >= end.getTime()) {  
	                return null;  
	            }  
	            long date = random(start.getTime(), end.getTime());  
	  
	            return new Date(date);  
	        } catch (Exception e) {  
	            e.printStackTrace();  
	        }  
	        return null;  
	    }  
	  
	    private static long random(long begin, long end) {  
	        long rtn = begin + (long) (Math.random() * (end - begin));  
	        //                ，               
	        if (rtn == begin || rtn == end) {  
	            return random(begin, end);  
	        }  
	        return rtn;  
	    }  
	  
	} 

public static Date getRandomDate() {
		Random rand = new Random();
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd ");
		Calendar cal = Calendar.getInstance();
		cal.set(2000, 0, 1);
		long start = cal.getTimeInMillis();
		cal.set(2012, 10, 1);
		long end = cal.getTimeInMillis();
		Date d = new Date(start + (long) (rand.nextDouble() * (end - start)));
		System.out.println(format.format(d));
		return d;
	}

Date d=new Date(start+(long)*(end-start)；
これはネットで見たのです。    この文は問題があります  まだ直す時間がないです。