获取当前时间毫秒值、当天起始时间毫秒值、当天结束时间毫秒值

 

package com.fortis;

import java.util.Calendar;
import java.util.Date;

/**
 * 时间工具类
 * @since 2017/8/7
 */
public class Test {
    public static void main(String[] args) {
        //1、获取当前时间毫秒值（方式一）
        Long nowTime = getNowTime();
        System.out.println(nowTime);
        
        Date d = new Date(nowTime);
        System.out.println(d);
        System.out.println("-----------------------");
        
        //2、获取当前时间毫秒值（方式二）
        long currentTimeMillis = System.currentTimeMillis();
        System.out.println(currentTimeMillis);
        
        Date d2 = new Date(currentTimeMillis);
        System.out.println(d2);
        System.out.println("-----------------------");
        
        //3、获取当天起始时间（00:00:00）毫秒值
        Long startTime = getStartTime();
        System.out.println(startTime);
        
        Date d3 = new Date(startTime);
        System.out.println(d3);
        System.out.println("-----------------------");
        
        //4、获取当天结束时间（23:59:59）毫秒值
        Long endTime = getEndTime();
        System.out.println(endTime);
        
        Date d4 = new Date(endTime);
        System.out.println(d4);
        System.out.println("-----------------------");
    }

    /**
    * 获取当前系统时间 单位：毫秒
    * @return
    */
    public static Long getNowTime() {
        Calendar todayNow = Calendar.getInstance();
        return todayNow.getTime().getTime();
    }
    
    
    /**
    * 获取当天的开始时间 单位：毫秒
    * @return
    */
    private static Long getStartTime(){ 
        Calendar todayStart = Calendar.getInstance(); 
        todayStart.set(Calendar.HOUR_OF_DAY, 0); 
        todayStart.set(Calendar.MINUTE, 0); 
        todayStart.set(Calendar.SECOND, 0); 
        todayStart.set(Calendar.MILLISECOND, 0); 
        return todayStart.getTime().getTime(); 
    } 
    
    
    /**
    * 获取当天的结束时间 单位：毫秒
    * @return
    */
    private static Long getEndTime(){ 
        Calendar todayEnd = Calendar.getInstance(); 
        todayEnd.set(Calendar.HOUR_OF_DAY, 23); 
        todayEnd.set(Calendar.MINUTE, 59); 
        todayEnd.set(Calendar.SECOND, 59); 
        todayEnd.set(Calendar.MILLISECOND, 999); 
        return todayEnd.getTime().getTime(); 
    } 

}

 

控制台效果：

    1502091589654
    Mon Aug 07 15:39:49 CST 2017
    -----------------------
    1502091589659
    Mon Aug 07 15:39:49 CST 2017
    -----------------------
    1502035200000
    Mon Aug 07 00:00:00 CST 2017
    -----------------------
    1502121599999
    Mon Aug 07 23:59:59 CST 2017
    -----------------------