java获取当前时间

import java.io.IOException;import java.sql.Timestamp;import java.util.Calendar;import java.util.Date;import java.sql.Timestamp;import java.util.Calendar;import java.util.Date;public class StringTest {static Date nowTime = null;public static void main(String[] args) {// 以下为 Clendar 测试代码int year, month, day;// 年， 月，日Calendar rightNow = Calendar.getInstance();year = rightNow.get(Calendar.YEAR);month = rightNow.get(Calendar.MONTH) + 1;day = rightNow.get(Calendar.DAY_OF_MONTH);System.out.println("year = " + year);System.out.println("month = " + month);System.out.println("day = " + day);int hour, minute, second;// 小时，分钟，秒数hour = rightNow.get(Calendar.HOUR);// hour = rightNow.get(Calendar.HOUR_OF_DAY); 二十四小时制，如下午3点对于15时minute = rightNow.get(Calendar.MINUTE);second = rightNow.get(Calendar.SECOND);System.out.println("hour = " + hour);System.out.println("minute = " + minute);System.out.println("second = " + second);// 1. System.currentTimeMillis() 获取系统时间的代码                //注意Timestamp导包进去的是import java.sql.Timestamp;//而不是import java.security.Timestamp;Timestamp timeStamp = new Timestamp(System.currentTimeMillis());String dateStr1 = timeStamp.toString();System.out.println("System.currentTimeMillis() = " + dateStr1);// 2. date 为获得系统时间的另外一种方法Date date = new Date();String dateStr2 = new Timestamp(date.getTime()).toString();System.out.println(dateStr2);// 得到JAVA运行环境的一些基本属性System.getProperties().list(System.out);}}