计算出两个日期相隔多少天

计算出两个日期相隔多少天，直接上代码：

import java.text.SimpleDateFormat;

import java.util.Date;

import org.junit.Test;



public class T1 {

	

	@Test

	public void t(){

		String before = "2013-5-15";

		String now = "2013-5-17";

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

		try {

			Date d1 = sdf.parse(before);

			Date d2 = sdf.parse(now);

			long daysBetween = (d2.getTime() - d1.getTime() + 1000000)

					/ (3600 * 24 * 1000);

			System.out.println("相隔："+daysBetween+"天");

		} catch (Exception e) {

			System.out.println(e.getMessage());

		}

	}

}

交流探讨到我的新浪微博：http://weibo.com/tianrui1990