Java中时间间隔的计算(以前的时间与现在的时间间隔)

interval.java

import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Date;


public class IntervalUtil {
	
	public String getInterval(String createtime) {
		String interval = null;
		
		SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		ParsePosition pos = new ParsePosition(0);
		Date d1 = (Date) sd.parse(createtime, pos);
		
		long time = new Date().getTime() - d1.getTime();
		if(time/1000 < 10 && time/1000 > 0) {
			interval ="刚刚";
		} else if(time/3600000 < 24 && time/3600000 > 0) {
			int h = (int) (time/3600000);
			interval = h + "小时前";
		} else if(time/60000 < 60 && time/60000 > 0) {
			int m = (int) ((time%3600000)/60000);
			interval = m + "分钟前";
		} else if(time/1000 < 60 && time/1000 > 0) {
			int se = (int) ((time%60000)/1000);
			interval = se + "秒前";
		}else {
			SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
			
			ParsePosition pos2 = new ParsePosition(0);
			Date d2 = (Date) sdf.parse(createtime, pos2);
			
			interval = sdf.format(d2);
		}
		return interval;
	}
}