输入年份，和这个年份的第几天，转成年月日。 

  1 var year = 2016; //年份
  2 var days = 170; //第几天
  3 
  4 
  5 function days2month_day(year, days) {
  6     "use strict";
  7     var month = "1月"; //默认1月
  8     var day = "1日";
  9     var reminder = 0;
 10     //闰年 1月31  2月29 3月31 4月30 5月31 6月30 7月31 8月31 9月30 10月31 11月30 12月31
 11     if (year % 400 == 0 || (year % 100 != 0 && year % 4 == 0)) {
 12 
 13         if (days - 31 <= 0) {
 14             month = "1月";
 15             reminder = days;
 16             day = "" + reminder + "日";
 17         } else if (days - 60 <= 0) {
 18             month = "2月";
 19             reminder =  (days - 31);
 20             day = "" + reminder + "日";
 21 
 22         } else if (days - 91 <= 0) {
 23             month = "3月";
 24             reminder = (days - 60);
 25             day = "" + reminder + "日";
 26         } else if (days - 121 <= 0) {
 27             month = "4月";
 28             reminder = (days - 91);
 29             day = "" + reminder + "日";
 30 
 31         } else if (days - 152 <= 0) {
 32             month = "5月";
 33             reminder = (days - 121);
 34             day = "" + reminder + "日";
 35 
 36         } else if (days - 182 <= 0) {
 37             month = "6月";
 38             reminder = (days - 152);
 39             day = "" + reminder + "日";
 40 
 41         } else if (days - 213 <= 0) {
 42             month = "7月";
 43             reminder = (days - 182);
 44             day = "" + reminder + "日";
 45 
 46         } else if (days - 244 <= 0) {
 47             month = "8月";
 48             reminder = (days - 213);
 49             day = "" + reminder + "日";
 50 
 51         } else if (days - 274 <= 0) {
 52             month = "9月";
 53             reminder = (days - 244);
 54             day = "" + reminder + "日";
 55 
 56         } else if (days - 305 <= 0) {
 57             month = "10月";
 58             reminder =  (days - 274);
 59             day = "" + reminder + "日";
 60 
 61         } else if (days - 335 <= 0) {
 62             month = "11月";
 63             reminder = (days - 305);
 64             day = "" + reminder + "日";
 65 
 66         } else if (days - 366 <= 0) {
 67             month = "12月";
 68             reminder = (days - 335);
 69             day = "" + reminder + "日";
 70         }
 71 
 72 
 73     }
 74     else {
 75         //平年 2月28天
 76         if (days - 31 <= 0) {
 77             month = "1月";
 78             reminder =  days;
 79             day = "" + reminder + "日";
 80         } else if (days - 59 <= 0) {
 81             month = "2月";
 82             reminder =  (days - 31);
 83             day = "" + reminder + "日";
 84 
 85         } else if (days - 90 <= 0) {
 86             month = "3月";
 87             reminder = (days - 59);
 88             day = "" + reminder + "日";
 89         } else if (days - 120 <= 0) {
 90             month = "4月";
 91             reminder = (days - 90);
 92             day = "" + reminder + "日";
 93 
 94         } else if (days - 151 <= 0) {
 95             month = "5月";
 96             reminder =  (days - 120);
 97             day = "" + reminder + "日";
 98 
 99         } else if (days - 181 <= 0) {
100             month = "6月";
101             reminder =  (days - 151);
102             day = "" + reminder + "日";
103 
104         } else if (days - 212 <= 0) {
105             month = "7月";
106             reminder = (days - 181);
107             day = "" + reminder + "日";
108 
109         } else if (days - 243 <= 0) {
110             month = "8月";
111             reminder = (days - 212);
112             day = "" + reminder + "日";
113 
114         } else if (days - 273 <= 0) {
115             month = "9月";
116             reminder = (days - 243);
117             day = "" + reminder + "日";
118 
119         } else if (days - 304 <= 0) {
120             month = "10月";
121             reminder =  (days - 273);
122             day = "" + reminder + "日";
123 
124         } else if (days - 334 <= 0) {
125             month = "11月";
126             reminder =(days - 304);
127             day = "" + reminder + "日";
128 
129         } else if (days - 365 <= 0) {
130             month = "12月";
131             reminder = (days - 334);
132             day = "" + reminder + "日";
133         }
134 
135 
136     }
137     return "" + year + "年" + month + day;
138 }
139 
140 var year_month_day = days2month_day(2016, 170);
141 console.log(year_month_day);

 

posted @ 2016-09-27 11:05  hdu胡恩超  阅读(599)  评论(0)    收藏  举报