使用ColdFusion重现这种printf格式的最直接的方法是什么？ [英] What is the most direct way to reproduce this printf-like format with ColdFusion?

问题描述

我已经投入ColdFusion做一个非常简单的任务。应用程序有一些逻辑显示帮助代码（让我们不介绍什么是帮助代码），但是，逻辑是buggy，需要修复。给定一个双字母代码，一个1-4位数字和另一个1-2位数字，我需要显示他们像 printf call会：

I've been thrown into ColdFusion for a very simple assignment. The application has some logic to display "help codes" (let's not get into what is a help code), however, the logic is buggy and needs to be fixed. Given a two-letters code, a 1-4 digits number, and another 1-2 digits number, I would need to display them like this printf call would:

printf("%s%04d%02d", letterCode, bigNumber, smallNumber);

如果你不熟悉printf函数，它接受一个格式字符串，并根据给定的格式在其中写入其他变量。 ％s 表示写入字符串，％d 表示写入数字; ％0zd 表示编写一个数字并用零填充，以便它至少有 z 个字符（因此％04d 表示写一个数字，并用零填充，因此它的长度至少为4位数字。

If you're not familiar with the printf function, it accepts a format string (the first parameter), and writes the other variables in it according to the given format. %s means "write a string" and %d means "write a number"; %0zd means "write a number and pad it with zeroes so it's at least z characters long (so %04d means "write a number and pad it with zeroes so it lengths at least 4 digits).

这里有一些例子，％s％04d％02d ：

"AD", 45, 12:  AD004512
"GI", 5121, 1: GI512101
"FO", 1, 0:    FO000100

$ b b

但是，这是我第一次使用ColdFusion，我找不到像 printf 或 sprintf 以格式化字符串。

另一个人，不再在这里工作，诉诸一个（非工作）循环，我认为这将是更好的使用库代码，而不是实际修复循环，因为无论如何，我可能需要再做类似的事情。

The other guy, who doesn't work here anymore, resorted to a (non-working) loop, and I thought it would be better to use library code instead of actually fixing the loop, since anyways I might need to do similar things again.

推荐答案

<cfset bigNumberPadded = NumberFormat(bigNumber,"0000")>
<cfset smallNumberPadded = NumberFormat(smallNumber,"00")>
<cfoutput>#letterCode##bigNumberPadded##smallNumberPadded#<cfoutput>

或者...正如bpanulla建议的，并由Leigh更正

Or alternatively... as suggested by bpanulla, and corrected by Leigh

<cfset args = ["AD", javacast("int", 45), javacast("int", 12)]>
<cfset output= createObject("java","java.lang.String").format("%s%04d%02d", args) >

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