得到系统时间

/**
* 返回当前详细时间 格式如:2007-01-01 10:23:30
*/
public static String now() {
GregorianCalendar gerCalendar = new GregorianCalendar();
java.util.Date date = gerCalendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return sdf.format(date);
}

/**
* 返回当前日期 格式如:2007-01-01
*/
public static String date() {
GregorianCalendar gerCalendar = new GregorianCalendar();
java.util.Date date = gerCalendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(date);
}