import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class DateUtils {

/**

* 返回unix时间戳 (1970年至今的秒数)

* @return

*/

public static long getUnixStamp(){

return System.currentTimeMillis()/1000;

}

/**

* 得到昨天的日期

* @return

*/

public static String getYestoryDate() {

Calendar calendar = Calendar.getInstance();

calendar.add(Calendar.DATE,-1);

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

String yestoday = sdf.format(calendar.getTime());

return yestoday;

}

/**

* 得到今天的日期

* @return

*/

public static String getTodayDate(){

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

String date = sdf.format(new Date());

return date;

}

/**

* 时间戳转化为时间格式

* @param timeStamp

* @return

*/

public static String timeStampToStr(long timeStamp) {

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String date = sdf.format(timeStamp * 1000);

return date;

}

/**

* 得到日期 yyyy-MM-dd

* @param timeStamp 时间戳

* @return

*/

public static String formatDate(long timeStamp) {

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

String date = sdf.format(timeStamp*1000);

return date;

}

/**

* 得到时间 HH:mm:ss

* @param timeStamp 时间戳

* @return

*/

public static String getTime(long timeStamp) {

String time = null;

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String date = sdf.format(timeStamp * 1000);

String[] split = date.split("\\s");

if ( split.length > 1 ){

time = split[1];

}

return time;

}

/**

* 将一个时间戳转换成提示性时间字符串，如刚刚，1秒前

*

* @param timeStamp

* @return

*/

public static String convertTimeToFormat(long timeStamp) {

long curTime =System.currentTimeMillis() / (long) 1000 ;

long time = curTime - timeStamp;

if (time < 60 && time >= 0) {

return "刚刚";

} else if (time >= 60 && time < 3600) {

return time / 60 + "分钟前";

} else if (time >= 3600 && time < 3600 * 24) {

return time / 3600 + "小时前";

} else if (time >= 3600 * 24 && time < 3600 * 24 * 30) {

return time / 3600 / 24 + "天前";

} else if (time >= 3600 * 24 * 30 && time < 3600 * 24 * 30 * 12) {

return time / 3600 / 24 / 30 + "个月前";

} else if (time >= 3600 * 24 * 30 * 12) {

return time / 3600 / 24 / 30 / 12 + "年前";

} else {

return "刚刚";

}

}

/**

* 将一个时间戳转换成提示性时间字符串，(多少分钟)

*

* @param timeStamp

* @return

*/

public static String timeStampToFormat(long timeStamp) {

long curTime =System.currentTimeMillis() / (long) 1000 ;

long time = curTime - timeStamp;

return time/60 + "";

}

}