php 阴阳历转换
php阴阳历转换类
<?php
/**
* 由于系统原因，对于1970年以前和2038年以后的日期使用mktime()方法溢出，1970年前和2038年后的日期使用DteTime()类处理（此类仅支持php5.3+版本）
* 然后再用相关方法处理数据得到想要的日期格式。
*
* $lunarInfo元素
* $lunarInfo[0]: 农历润月月份
* $lunarInfo[1] 农历正月对应的阳历月份
* $lunarInfo[2] 农历正月初一对应的阳历日
* $lunarInfo[3]：农每月的天数减去29，得到的数就是第四位数的二进制，这个二进制数长度必须是16位，不够16位，后面补0，然后再转换成十进制。
*
**/
class Lunar {
var $MIN_YEAR = 1582;
var $MAX_YEAR = 2135;
var $lunarInfo = array(
array(0,2,4,51792),
array(2,1,24,21232),array(0,2,12,18800),array(9,1,31,25824),array(0,2,18,54432),array(0,2,7,59984),array(6,1,28,15008),
array(0,2,15,22224),array(0,2,5,11104),array(3,1,25,34272),array(0,2,13,37600),array(11,2,1,51568),array(0,2,20,43344),
array(0,2,9,54432),array(8,1,29,55968),array(0,2,16,46416),array(0,2,6,22192),array(4,1,27,11680),array(0,2,14,42448),
array(0,2,3,37584),array(2,1,23,53936),array(0,2,11,43344),array(9,1,31,46288),array(0,2,18,27296),array(0,2,7,44368),
array(6,1,28,22352),array(0,2,16,19360),array(0,2,4,42416),array(3,1,25,17776),array(0,2,13,21168),array(11,2,2,43328),
array(0,2,19,59728),array(0,2,9,27296),array(8,1,29,44448),array(0,2,17,39760),array(0,2,6,19296),array(4,1,26,43744),
array(0,2,14,42224),array(0,2,4,21088),array(2,1,22,53856),array(0,2,10,54608),array(10,1,31,23184),array(0,2,19,22176),
array(0,2,7,38608),array(6,1,28,18896),array(0,2,16,18912),array(0,2,5,42192),array(4,1,24,54480),array(0,2,12,53840),
array(11,2,1,54576),array(0,2,20,46400),array(0,2,8,46496),array(8,1,29,38304),array(0,2,17,38320),array(0,2,7,18864),
array(4,1,26,43376),array(0,2,14,42160),array(0,2,3,43600),array(1,1,23,59984),array(0,2,10,27968),array(11,1,30,44464),
array(0,2,19,11104),array(0,2,8,37744),array(6,1,28,19184),array(0,2,16,18800),array(0,2,5,25776),array(3,1,25,29856),
array(0,2,11,55888),array(11,2,1,27472),array(0,2,20,22224),array(0,2,10,10976),array(7,1,29,37856),array(0,2,17,37600),
array(0,2,6,51552),array(5,1,26,53584),array(0,2,13,54432),array(0,2,2,55888),array(1,1,23,13648),array(0,2,11,22176),
array(10,1,30,42720),array(0,2,18,42448),array(0,2,8,37584),array(6,1,28,43696),array(0,2,15,43344),array(0,2,4,46240),
array(4,1,24,47776),array(0,2,12,44368),array(0,2,1,21920),array(2,1,21,35744),array(0,2,9,42416),array(7,1,30,21360),
array(0,2,17,21168),array(0,2,6,26928),array(5,1,26,29008),array(0,2,14,27296),array(0,2,2,44368),array(3,1,23,23376),
array(0,2,11,19296),array(8,1,31,42464),array(0,2,18,42208),array(0,2,7,53856),array(6,1,27,60000),array(0,2,15,54560),
array(0,2,3,55968),array(4,1,24,26272),array(0,2,12,22224),array(0,2,2,19168),array(3,1,21,43472),array(0,2,9,42192),
array(7,1,29,53936),array(0,2,17,45648),array(0,2,5,54560),array(5,1,25,54592),array(0,2,13,46496),array(0,2,3,21968),
array(3,1,23,21936),array(0,2,11,18864),array(7,1,31,42352),array(0,2,19,42160),array(0,2,8,43600),array(6,1,28,46672),
array(0,2,16,27936),array(0,2,5,44448),array(4,1,25,23392),array(0,2,13,37744),array(0,2,3,18800),array(3,1,23,26992),
array(0,2,10,25776),array(7,1,30,27296),array(0,2,17,55888),array(0,2,7,23200),array(5,1,26,44736),array(0,2,14,43744),
array(0,2,4,37600),array(3,1,24,53984),array(0,2,11,51552),array(8,1,31,54352),array(0,2,19,54432),array(0,2,8,54608),
array(6,1,28,22864),array(0,2,16,22176),array(0,2,5,42720),array(4,1,26,21968),array(0,2,13,21200),array(0,2,2,43344),
array(3,1,22,51536),array(0,2,10,46240),array(7,1,29,46240),array(0,2,17,44368),array(0,2,7,21920),array(5,1,27,41888),
array(0,2,14,42416),array(0,2,4,21168),array(4,1,24,41328),array(0,2,12,26928),array(9,1,31,27312),array(0,2,19,27296),
array(0,2,8,43856),array(6,1,29,20304),array(0,2,16,19296),array(0,2,5,42352),array(4,1,26,21216),array(0,2,13,53600),
array(0,2,1,59696),array(3,1,22,29984),array(0,2,9,55968),array(7,1,30,23200),array(0,2,17,22224),array(0,2,7,19168),
array(5,1,27,41424),array(0,2,15,41680),array(0,2,3,53584),array(4,1,23,55888),array(0,2,11,46368),array(9,1,31,54944),
array(0,2,18,44448),array(0,2,8,21968),array(6,1,29,10672),array(0,2,17,17840),array(0,2,5,41648),array(5,1,25,45744),
array(0,2,13,43344),array(0,2,2,46368),array(2,1,21,43808),array(0,2,9,44384),array(7,1,30,21856),array(0,2,18,37744),
array(0,2,7,17776),array(5,1,27,25968),array(0,2,15,21168),array(0,2,4,26960),array(3,1,23,31056),array(0,2,11,23200),
array(10,1,31,43872),array(0,2,19,42704),array(0,2,8,19168),array(6,1,28,42720),array(0,2,16,42336),array(0,2,5,54432),
array(5,1,24,60064),array(0,2,12,54608),array(0,2,2,23200),array(3,1,22,46752),array(0,2,9,42704),array(7,1,30,19408),
array(0,2,18,19120),array(0,2,7,43216),array(5,1,26,54608),array(0,2,14,45728),array(0,2,3,46416),array(4,1,24,23888),
array(0,2,11,19872),array(0,1,31,38352),array(2,1,21,21872),array(0,2,9,18864),array(6,1,28,43376),array(0,2,16,25776),
array(0,2,5,27280),array(4,1,25,47776),array(0,2,13,27472),array(0,2,3,11168),array(2,1,23,43872),array(0,2,11,37744),
array(6,1,31,21216),array(0,2,18,53600),array(0,2,7,58544),array(5,1,28,27936),array(0,2,14,55952),array(0,2,4,23376),
array(3,1,25,14032),array(0,2,13,10976),array(0,2,1,41696),array(2,1,21,58064),array(0,2,9,51536),array(6,1,29,54608),
array(0,2,16,46368),array(0,2,5,46736),array(4,1,26,23968),array(0,2,14,21968),array(0,2,3,9680),array(3,1,23,42416),
array(0,2,11,25264),array(7,1,31,43184),array(0,2,18,43344),array(0,2,7,46240),array(5,1,27,45728),array(0,2,15,44368),
array(0,2,4,21936),array(4,1,25,11120),array(0,2,13,9584),array(9,2,2,21232),array(0,2,20,21168),array(0,2,9,26960),
array(6,1,29,27984),array(0,2,17,23200),array(0,2,5,43856),array(4,1,26,22224),array(0,2,14,19168),array(0,2,3,42352),
array(3,1,23,17744),array(0,2,10,53920),array(7,1,30,59552),array(0,2,18,54608),array(0,2,7,23200),array(5,1,27,44448),
array(0,2,15,38352),array(0,2,5,19168),array(4,1,24,43696),array(0,2,12,42192),array(8,2,1,53936),array(0,2,20,45712),
array(0,2,8,46416),array(7,1,29,22352),array(0,2,17,11680),array(0,2,6,38352),array(5,1,26,19824),array(0,2,14,18864),
array(0,2,3,42160),array(3,1,23,42160),array(0,2,10,27280),array(8,1,30,44432),array(0,2,18,27472),array(0,2,8,11104),
array(5,1,27,37728),array(0,2,15,37744),array(0,2,5,18800),array(4,1,25,26976),array(0,2,11,58528),array(10,1,31,60000),
array(0,2,19,55952),array(0,2,9,23248),array(6,1,29,10960),array(0,2,17,10976),array(0,2,6,37600),array(5,1,26,51920),
array(0,2,13,51536),array(0,2,2,54432),array(3,1,22,54432),array(0,2,10,46736),array(7,1,30,22432),array(0,2,18,21936),
array(0,2,8,9680),array(5,1,28,38320),array(0,2,15,37552),array(0,2,4,43344),array(4,1,24,55632),array(0,2,12,46240),
array(0,1,31,45392),array(2,1,21,27984),
array(0,2,9,21936),array(6,1,30,9656),array(0,2,17,9584),array(0,2,6,21168),array(5,1,26,43344),array(0,2,13,59728),
array(0,2,2,27296),array(3,1,22,44368),array(0,2,10,43856),array(8,1,30,19304),array(0,2,19,19168),array(0,2,8,42352),
array(5,1,29,21096),array(0,2,16,53856),array(0,2,4,55632),array(4,1,25,27304),array(0,2,13,22176),array(0,2,2,39632),
array(2,1,22,19176),array(0,2,10,19168),array(6,1,30,42200),array(0,2,18,42192),array(0,2,6,53840),array(5,1,26,54568),
array(0,2,14,46400),array(0,2,3,54944),array(2,1,23,38608),array(0,2,11,38320),array(7,2,1,18872),array(0,2,20,18800),
array(0,2,8,42160),array(5,1,28,45656),array(0,2,16,27216),array(0,2,5,27968),array(4,1,24,44456),array(0,2,13,11104),
array(0,2,2,38256),array(2,1,23,18808),array(0,2,10,18800),array(6,1,30,25776),array(0,2,17,54432),array(0,2,6,59984),
array(5,1,26,27976),array(0,2,14,23248),array(0,2,4,11104),array(3,1,24,37744),array(0,2,11,37600),array(7,1,31,51560),
array(0,2,19,51536),array(0,2,8,54432),array(6,1,27,55888),array(0,2,15,46416),array(0,2,5,22176),array(4,1,25,43736),
array(0,2,13,9680),array(0,2,2,37584),array(2,1,22,51544),array(0,2,10,43344),array(7,1,29,46248),array(0,2,17,27808),
array(0,2,6,46416),array(5,1,27,21928),array(0,2,14,19872),array(0,2,3,42416),array(3,1,24,21176),array(0,2,12,21168),
array(8,1,31,43344),array(0,2,18,59728),array(0,2,8,27296),array(6,1,28,44368),array(0,2,15,43856),array(0,2,5,19296),
array(4,1,25,42352),array(0,2,13,42352),array(0,2,2,21088),array(3,1,21,59696),array(0,2,9,55632),array(7,1,30,23208),
array(0,2,17,22176),array(0,2,6,38608),array(5,1,27,19176),array(0,2,15,19152),array(0,2,3,42192),array(4,1,23,53864),
array(0,2,11,53840),array(8,1,31,54568),array(0,2,18,46400),array(0,2,7,46752),array(6,1,28,38608),array(0,2,16,38320),
array(0,2,5,18864),array(4,1,25,42168),array(0,2,13,42160),array(10,2,2,45656),array(0,2,20,27216),array(0,2,9,27968),
array(6,1,29,44448),array(0,2,17,43872),array(0,2,6,38256),array(5,1,27,18808),array(0,2,15,18800),array(0,2,4,25776),
array(3,1,23,27216),array(0,2,10,59984),array(8,1,31,27432),array(0,2,19,23232),array(0,2,7,43872),array(5,1,28,37736),
array(0,2,16,37600),array(0,2,5,51552),array(4,1,24,54440),array(0,2,12,54432),array(0,2,1,55888),array(2,1,22,23208),
array(0,2,9,22176),array(7,1,29,43736),array(0,2,18,9680),array(0,2,7,37584),array(5,1,26,51544),array(0,2,14,43344),
array(0,2,3,46240),array(4,1,23,46416),array(0,2,10,44368),array(9,1,31,21928),array(0,2,19,19360),array(0,2,8,42416),
array(6,1,28,21176),array(0,2,16,21168),array(0,2,5,43312),array(4,1,25,29864),array(0,2,12,27296),array(0,2,1,44368),
array(2,1,22,19880),array(0,2,10,19296),array(6,1,29,42352),array(0,2,17,42208),array(0,2,6,53856),array(5,1,26,59696),
array(0,2,13,54576),array(0,2,3,23200),array(3,1,23,27472),array(0,2,11,38608),array(11,1,31,19176),array(0,2,19,19152),
array(0,2,8,42192),array(6,1,28,53848),array(0,2,15,53840),array(0,2,4,54560),array(5,1,24,55968),array(0,2,12,46496),
array(0,2,1,22224),array(2,1,22,19160),array(0,2,10,18864),array(7,1,30,42168),array(0,2,17,42160),array(0,2,6,43600),
array(5,1,26,46376),array(0,2,14,27936),array(0,2,2,44448),array(3,1,23,21936),array(0,2,11,37744),array(8,2,1,18808),
array(0,2,19,18800),array(0,2,8,25776),array(6,1,28,27216),array(0,2,15,59984),array(0,2,4,27424),array(4,1,24,43872),
array(0,2,12,43744),array(0,2,2,37600),array(3,1,21,51568),array(0,2,9,51552),array(7,1,29,54440),array(0,2,17,54432),
array(0,2,5,55888),array(5,1,26,23208),array(0,2,14,22176),array(0,2,3,42704),array(4,1,23,21224),array(0,2,11,21200),
array(8,1,31,43352),array(0,2,19,43344),array(0,2,7,46240),array(6,1,27,46416),array(0,2,15,44368),array(0,2,5,21920),
array(4,1,24,42448),array(0,2,12,42416),array(0,2,2,21168),array(3,1,22,43320),array(0,2,9,26928),array(7,1,29,29336),
array(0,2,17,27296),array(0,2,6,44368),array(5,1,26,19880),array(0,2,14,19296),array(0,2,3,42352),array(4,1,24,21104),
array(0,2,10,53856),array(8,1,30,59696),array(0,2,18,54560),array(0,2,7,55968),array(6,1,27,27472),array(0,2,15,22224),
array(0,2,5,19168),array(4,1,25,42216),array(0,2,12,42192),array(0,2,1,53584),array(2,1,21,55592),array(0,2,9,54560),
array(7,1,29,55952),array(0,2,7,46496),array(0,2,7,21968),array(5,1,28,19888),array(0,2,15,18864),array(0,2,4,42160),
array(4,1,24,54448),array(0,2,12,43600),array(9,1,31,46416),array(0,2,19,27936),array(0,2,8,44384),array(6,1,29,22368),
array(0,2,16,37744),array(0,2,6,18800),array(4,1,26,26992),array(0,2,14,21680),array(0,2,2,27216),array(3,1,22,31312),
array(0,2,10,27296),array(7,1,30,43680),array(0,2,17,43728),array(0,2,7,21216),array(5,1,27,51936),array(0,2,15,43360),
array(0,2,3,54432),array(4,1,23,58528),array(0,2,11,55632),array(9,2,1,23248),array(0,2,19,22176),array(0,2,8,42704),
array(6,1,29,20944),array(0,2,17,21200),array(0,2,5,43216),array(5,1,25,53584),array(0,2,13,45728),
);
/**
* 将阳历转换为阴历
* @param year 公历-年
* @param month 公历-月
* @param date 公历-日
*/
function convertSolarToLunar($year,$month,$date){
//debugger;
$yearData = $this->lunarInfo[$year-$this->MIN_YEAR];
if($year==$this->MIN_YEAR&&$month<=2&&$date<=4){
return array(1582,'正月','初一','辛卯',1,1,'兔'); //此处对应的年干支不对
}
return $this->getLunarByBetween($year,$this->getDaysBetweenSolar($year,$month,$date,$yearData[1],$yearData[2]));
}
function convertSolarMonthToLunar($year,$month) {
$yearData = $this->lunarInfo[$year-$this->MIN_YEAR];
if($year==$this->MIN_YEAR&&$month<=2&&$date<=4){
return array(1582,'正月','初一','辛卯',1,1,'兔'); //此处对应的年干支不对
}
$month_days_ary = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
$dd = $month_days_ary[$month];
if($this->isLeapYear($year) && $month == 2) $dd++;
$lunar_ary = array();
for ($i = 1; $i < $dd; $i++) {
$array = $this->getLunarByBetween($year,$this->getDaysBetweenSolar($year, $month, $i, $yearData[1], $yearData[2]));
$array[] = $year . '-' . $month . '-' . $i;
$lunar_ary[$i] = $array;
}
return $lunar_ary;
}
/**
* 将阴历转换为阳历
* @param year 阴历-年
* @param month 阴历-月，闰月处理：例如如果当年闰五月，那么第二个五月就传六月，相当于阴历有13个月，只是有的时候第13个月的天数为0
* @param date 阴历-日
*/
function convertLunarToSolar($year,$month,$date){
$yearData = $this->lunarInfo[$year-$this->MIN_YEAR];
$between = $this->getDaysBetweenLunar($year,$month,$date);
$res = mktime(0,0,0,$yearData[1],$yearData[2],$year);
$res = date('Y-m-d', $res+$between*24*60*60);
$day = explode('-', $res);
$year = $day[0];
$month= $day[1];
$day = $day[2];
return array($year, $month, $day);
}
/**
* 判断是否是闰年
* @param year
*/
function isLeapYear($year){
return (($year%4==0 && $year%100 !=0) || ($year%400==0));
}
/**
* 获取干支纪年
* @param year
*/
function getLunarYearName($year){
$sky = array('庚','辛','壬','癸','甲','乙','丙','丁','戊','己');
$earth = array('申','酉','戌','亥','子','丑','寅','卯','辰','巳','午','未');
$year = $year.'';
return $sky[$year{3}].$earth[$year%12];
}
/**
* 根据阴历年获取生肖
* @param year 阴历年
*/
function getYearZodiac($year){
$zodiac = array('猴','鸡','狗','猪','鼠','牛','虎','兔','龙','蛇','马','羊');
return $zodiac[$year%12];
}
/**
* 获取阳历月份的天数
* @param year 阳历-年
* @param month 阳历-月
*/
function getSolarMonthDays($year,$month){
$monthHash = array('1'=>31,'2'=>$this->isLeapYear($year)?29:28,'3'=>31,'4'=>30,'5'=>31,'6'=>30,'7'=>31,'8'=>31,'9'=>30,'10'=>31,'11'=>30,'12'=>31);
return $monthHash["$month"];
}
/**
* 获取阴历月份的天数
* @param year 阴历-年
* @param month 阴历-月，从一月开始
*/
function getLunarMonthDays($year,$month){
$monthData = $this->getLunarMonths($year);
return $monthData[$month-1];
}
/**
* 获取阴历每月的天数的数组
* @param year
*/
function getLunarMonths($year){
$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
$leapMonth = $yearData[0];
$bit = decbin($yearData[3]);
for ($i = 0; $i < strlen($bit);$i ++) {
$bitArray[$i] = substr($bit, $i, 1);
}
for($k=0,$klen=16-count($bitArray);$k<$klen;$k++){
array_unshift($bitArray, '0');
}
$bitArray = array_slice($bitArray,0,($leapMonth==0?12:13));
for($i=0; $i<count($bitArray); $i++){
$bitArray[$i] = $bitArray[$i] + 29;
}
return $bitArray;
}
/**
* 获取农历每年的天数
* @param year 农历年份
*/
function getLunarYearDays($year){
$yearData = $this->lunarInfo[$year-$this->MIN_YEAR];
$monthArray = $this->getLunarYearMonths($year);
$len = count($monthArray);
return ($monthArray[$len-1]==0?$monthArray[$len-2]:$monthArray[$len-1]);
}
function getLunarYearMonths($year){
//debugger;
$monthData = $this->getLunarMonths($year);
$res=array();
$temp=0;
$yearData = $this->lunarInfo[$year-$this->MIN_YEAR];
$len = ($yearData[0]==0?12:13);
for($i=0;$i<$len;$i++){
$temp=0;
for($j=0;$j<=$i;$j++){
$temp+=$monthData[$j];
}
array_push($res, $temp);
}
return $res;
}
/**
* 获取闰月
* @param year 阴历年份
*/
function getLeapMonth($year){
$yearData = $this->lunarInfo[$year-$this->MIN_YEAR];
return $yearData[0];
}
/**
* 计算阴历日期与正月初一相隔的天数
* @param year
* @param month
* @param date
*/
function getDaysBetweenLunar($year,$month,$date){
$yearMonth = $this->getLunarMonths($year);
$res=0;
for($i=1;$i<$month;$i++){
$res +=$yearMonth[$i-1];
}
$res+=$date-1;
return $res;
}
/**
* 计算2个阳历日期之间的天数
* @param year 阳历年
* @param cmonth
* @param cdate
* @param dmonth 阴历正月对应的阳历月份
* @param ddate 阴历初一对应的阳历天数
*/
function getDaysBetweenSolar($year,$cmonth,$cdate,$dmonth,$ddate){
$a = mktime(0,0,0,$cmonth,$cdate,$year);
$b = mktime(0,0,0,$dmonth,$ddate,$year);
return ceil(($a-$b)/24/3600);
}
/**
* 根据距离正月初一的天数计算阴历日期
* @param year 阳历年
* @param between 天数
*/
function getLunarByBetween($year,$between){
//debugger;
$lunarArray = array();
$yearMonth=array();
$t=0;
$e=0;
$leapMonth=0;
$m='';
if($between==0){
array_push($lunarArray, $year,'正月','初一');
$t = 1;
$e = 1;
}else{
$year = $between>0? $year : ($year-1);
$yearMonth = $this->getLunarYearMonths($year);
$leapMonth = $this->getLeapMonth($year);
$between = $between>0?$between : ($this->getLunarYearDays($year)+$between);
for($i=0;$i<13;$i++){
if($between==$yearMonth[$i]){
$t=$i+2;
$e=1;
break;
}else if($between<$yearMonth[$i]){
$t=$i+1;
$e=$between-(empty($yearMonth[$i-1])?0:$yearMonth[$i-1])+1;
break;
}
}
$m = ($leapMonth!=0&&$t==$leapMonth+1)?('闰'.$this->getCapitalNum($t- 1,true)):$this->getCapitalNum(($leapMonth!=0&&$leapMonth+1<$t?($t-1):$t),true);
array_push($lunarArray,$year,$m,$this->getCapitalNum($e,false));
}
array_push($lunarArray,$this->getLunarYearName($year));// 天干地支
array_push($lunarArray,$t,$e);
array_push($lunarArray,$this->getYearZodiac($year));// 12生肖
array_push($lunarArray,$leapMonth);// 闰几月
return $lunarArray;
}
/**
* 获取数字的阴历叫法
* @param num 数字
* @param isMonth 是否是月份的数字
*/
function getCapitalNum($num,$isMonth){
$isMonth = $isMonth || false;
$dateHash=array('0'=>'','1'=>'一','2'=>'二','3'=>'三','4'=>'四','5'=>'五','6'=>'六','7'=>'七','8'=>'八','9'=>'九','10'=>'十 ');
$monthHash=array('0'=>'','1'=>'正月','2'=>'二月','3'=>'三月','4'=>'四月','5'=>'五月','6'=>'六月','7'=>'七月','8'=>'八月','9'=>'九月','10'=>'十月','11'=>'冬月','12'=>'腊月');
$res='';
if($isMonth){
$res = $monthHash[$num];
}else{
if($num<=10){
$res = '初'.$dateHash[$num];
}else if($num>10&&$num<20){
$res = '十'.$dateHash[$num-10];
}else if($num==20){
$res = "二十";
}else if($num>20&&$num<30){
$res = "廿".$dateHash[$num-20];
}else if($num==30){
$res = "三十";
}
}
return $res;
}
}
$year = 2101;
$month = 1;
$day = 30;
$lunar = new Lunar();
$yangli = $lunar->convertLunarToSolar($year,$month,$day);
echo '<pre>';
print_r($yangli);
$nongli = $lunar->convertSolarToLunar($year, $month, $day);
print_r($yangli);
百度发现一篇不一样的文章：https://blog.csdn.net/hsd2012/article/details/51701640