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