java 获取当前系统时间

public static void main(String[] args) {

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

String datetime = tempDate.format(new java.util.Date());

System.out.println(datetime);

}

显示：2012-05-16

public static void main(String[] args) {

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

String datetime = tempDate.format(new java.util.Date());

System.out.println(datetime);

}

显示：2013-05-16 12:12:56

long now = System.currentTimeMillis(); // 现在经过的毫秒数
long time = now / 1000;// 现在经过的秒数
long time2 = time - 2 * 24 * 60 * 60;// 少两天的天数

String sql = "select GlobalID from "
+ ch.getTableName()
+ " where Status=1 and ChannelCode like '"+ch.getChannelCode()+"%' and CreateDate>"
+ time2+" order by PublishDate desc";