JAVA获取时间的四种方法

package com.soft;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;public class DateTest {public static void main(String[] args) {SimpleDateFormat format = new SimpleDateFormat("   a hh:mm \nyyyy/MM/dd E");//定义日期的显示格式/*Date date = new Date();//获取获取本本地System.out.println(format.format(date));*//*long millis = System.currentTimeMillis();//获取本地时间，单位是毫秒Date date = new Date(millis);System.out.println(format.format(date));*//*Calendar calendar = Calendar.getInstance();//获得本地的日历calendar.setTime(new Date());//设置日历的时间Date time = calendar.getTime();//获得本地时间System.out.println(format.format(time));*/Calendar calendar = Calendar.getInstance();//获得本地的日历格式calendar.setTimeInMillis(System.currentTimeMillis());//设置日历的时间Date date = new Date(calendar.getTimeInMillis());System.out.println(format.format(date));}}