格式化Javascript字符串有03不是3？ [英] Formatting Javascript string to have 03 not 3?

问题描述

 函数openToday（）
 {
 var today = new Date（）; 
 var strYear = today.getFullYear（）; 
 var strMonth = today.getMonth（）; 
 var strDay = today.getDate（）; 
 $ b var strURL =file：/ time /+ strYear +_+ strMonth +/+ strYear +_+ strMonth +_+ strDay +/ _ + strDay + HTML。; 
 
 alert（strURL）; 
 window.open（strURL，myWindow）; 
 
 $ / code> 

问题是我想要 2011_03_10 ，但代码给我 2011_3_10 。
如何格式化Javascript字符串为03而不是3？

编辑

工作正常
$ b

  function openToday（）
 {
 var today = new Date（）; 
 var strYear = today.getFullYear（）; 
 var strMonth = today.getMonth（）; 
 strMonth + = 1; 
 if（strMonth <10）{
 strMonth =0+ strMonth; 
} 
 var strDay = today.getDate（）; 
 if（strDay <10）{
 strDay =0+ strDay; 
 
 $ b $ var strURL =file：/ time /+ strYear +/+ strMonth +/+ strYear +_+ strMonth +_+ strDay +/+ strYear + _ + strMonth + _ + strDay + HTML; 
 
 window.open（strURL，myWindow）; 
 
  

解决方案

检查月份只有一个字符长（或者，< 9）。然后前置0！

按长度

  var strMonth = today.getMonth（）; 
 
 if（strMonth .length == 1）{
 strMonth =0+ strMonth; 
 
 
 
 
 $ b 
 按编号 
  var strMonth = today.getMonth（）; 
 
 if（strMonth< 10）{
 strMonth =0+ strMonth; 
 
 
 
 $ b $ p 
 $ b 
可能要避免在 str ，因为Javascript没有明确定义类型，可能会混淆代码。例如，如果strMonth <1，则说 10 是很好的逻辑明智的，但保持明智的管理混乱。
 
 
 
 另一种方式！ 
  var strMonth =0+ today.getMonth（）; 
 strMonth = strMonth.substring（strMonth.length-2，2）; 
  
 
I have a Javascript that opens today file in html.
function openToday()
{   
    var today = new Date();
    var strYear = today.getFullYear();
    var strMonth = today.getMonth();
    var strDay = today.getDate();

    var strURL = "file:/time/"+strYear+"/"+strMonth+"/" + strYear+"_"+strMonth+"_"+strDay+ "/" + strYear+"_"+strMonth+"_"+strDay+".html";

    alert(strURL);
    window.open(strURL,"myWindow");
}
The problem is that I want to have the 2011_03_10, but the code gives me 2011_3_10.
How can I format the Javascript string to have 03 not 3?

EDIT

This code works fine 
function openToday()
{   
    var today = new Date();
    var strYear = today.getFullYear();
    var strMonth = today.getMonth();
    strMonth += 1;
    if(strMonth < 10){
        strMonth = "0" + strMonth;
    }
    var strDay = today.getDate();
    if(strDay < 10){
        strDay = "0" + strDay;
    }

    var strURL = "file:/time/"+strYear+"/"+strMonth+"/" + strYear+"_"+strMonth+"_"+strDay+ "/" + strYear+"_"+strMonth+"_"+strDay+".html";

    window.open(strURL,"myWindow");
}

解决方案
Check to see if the month is only 1 character long (or alternatively, < 9).  Then prepend the 0!

By length
var strMonth = today.getMonth();

if(strMonth .length == 1){
    strMonth = "0" + strMonth ;
}
By number
var strMonth = today.getMonth();

if(strMonth< 10){
    strMonth= "0" + strMonth;
}
Probably want to avoid prefixing the variable with str as Javascript doesn't explicitly define types, and can confuse the code.  For example, saying if strMonth < 10 is fine logic wise, but maintainance wise it's confusing to manage.

Another Way!
var strMonth = "0" + today.getMonth();
strMonth = strMonth.substring(strMonth.length-2, 2);


                        
这篇关于格式化Javascript字符串有03不是3？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！