将 Javascript 字符串格式化为 03 而不是 3？

发布于 2024-10-21 13:28:03 字数 1076 浏览 3 评论 0原文

我有一个 Javascript，可以以 html 格式打开今天的文件。

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");
}

问题是我想要 2011_03_10，但代码给了我 2011_3_10。如何将 Javascript 字符串格式化为 03 而不是 3？

编辑

此代码工作正常

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");
}

原文

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");
}

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毁梦 2024-10-28 13:28:03

检查月份是否只有 1 个字符长（或者 < 9）。然后在前面加上0！

按长度

var strMonth = today.getMonth();

if(strMonth .length == 1){
    strMonth = "0" + strMonth ;
}

按数字

var strMonth = today.getMonth();

if(strMonth< 10){
    strMonth= "0" + strMonth;
}

可能希望避免在变量前加上 str 前缀，因为 Javascript 没有明确定义类型，并且可能会混淆代码。例如，如果 strMonth 10 逻辑上很好，但维护方面管理起来很混乱。

另一种方式！

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

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);

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新一帅帅 2024-10-28 13:28:03

您可以创建一个通用的填充函数：

function pad(number, length) {
    var str = '' + number;
    while (str.length < length) {
        str = '0' + str;
    }
    return str;
}

pad(today.getDay(), 2); // If today was '3', would print '03'

You could create a general-purpose padding function:

function pad(number, length) {
    var str = '' + number;
    while (str.length < length) {
        str = '0' + str;
    }
    return str;
}

pad(today.getDay(), 2); // If today was '3', would print '03'

回复收藏 0 原文

谎言 2024-10-28 13:28:03

我前段时间为此做了一个功能。

var strURL = "file:/time/"+strYear+"/"+convertDateToString(date.getMonth()+1)+"/" +   strYear+"_"+convertDateToString(date.getMonth()+1)+"_"+strDay+ "/" +   strYear+"_"+strMonth+"_"+strDay+".html";

功能：

/*
Method: convertDateToString
Input: Integer  
Returns: a string from a number and adds a 0 when the number is smaller than 10

Examples: 1 => 01, 8 => 08, 11 => 11
*/ 
function convertDateToString(number){   
  return (number < 10 ) ? 0+number.toString() : number.toString();
}

祝你好运！

I made a function for that some time ago.

var strURL = "file:/time/"+strYear+"/"+convertDateToString(date.getMonth()+1)+"/" +   strYear+"_"+convertDateToString(date.getMonth()+1)+"_"+strDay+ "/" +   strYear+"_"+strMonth+"_"+strDay+".html";

The function:

/*
Method: convertDateToString
Input: Integer  
Returns: a string from a number and adds a 0 when the number is smaller than 10

Examples: 1 => 01, 8 => 08, 11 => 11
*/ 
function convertDateToString(number){   
  return (number < 10 ) ? 0+number.toString() : number.toString();
}

Good luck!

回复收藏 0 原文

随遇而安 2024-10-28 13:28:03

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

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

回复收藏 0 原文

人心善变 2024-10-28 13:28:03

也许您可以扩展它以允许填充字符串，如下所示：

function pad(number, length, padWith) {
    padWith = (typeof padWith!=='undefined) ? padWith : '0';
    var str = '' + number;
    while (str.length < length) {
        str = padWith + str;
    }
    return str;
}

Perhaps you may extend it to allow for padding strings like this:

function pad(number, length, padWith) {
    padWith = (typeof padWith!=='undefined) ? padWith : '0';
    var str = '' + number;
    while (str.length < length) {
        str = padWith + str;
    }
    return str;
}

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