如何在Scala中使用字符串插值将字符串格式化为固定宽度的字符串? [英] How do I format a string with string interpolation in Scala as a fixed width string?

问题描述

我正在连接一个非常老的系统，我需要生成的文件需要一个由字符串组成的字段，但宽度必须恰好为15.

I'm interfacing with a really old system and the file I need to generate needs a field that is a formed from a string but needs to be exactly 15 in width.

我想要这样的东西:

val companyName = "FooBar, Inc" // 11 chars
f"$companyName%s"

要返回:

"    FooBar, Inc"

是否有一种巧妙的方法可以完成我对String插值的处理?

Is there a slick way to do what I'm trying to do with the String interpolation?

推荐答案

使用格式字符串.当然有什么可以做你想要的:-)

Use String.format with a format string. Surely something there will do what you want :-)

此代码将执行您想要的操作:

This code would do what you want:

scala> val companyName = "FooBar, Inc"
companyName: String = FooBar, Inc

scala> f"$companyName%15s"
res0: String = "    FooBar, Inc"

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