java中怎么取得系统时间？

Question

new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new java.util.Date());

Answer 1

new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new java.util.Date());

Answer 2

import java.until.*;Calendar todaysDate = new GregorianCalendar();
year = todaysDate.get(Calendar.YEAR);
month = todaysDate.get(Calendar.MONTH) + 1;
day = todaysDate.get(Calendar.DAY_OF_MONTH);
hourOfDay = todaysDate.get(Calendar.HOUR_OF_DAY);  // 24小时制
hour = todaysDate.get(Calendar.HOUR);         // 12小时制
minute = todaysDate.get(Calendar.MINUTE);
second = todaysDate.get(Calendar.SECOND);

Answer 3

Calendar cal=Calendar.getInstance();
cal.setTimeInMillis(new Date(System.currentTimeMillis())-30*24*60*60);cal.setTimeInMillis(new Date(System.currentTimeMillis()))是获取系统时间。看看,这是 Current Time!