如何在Kotlin中读取环境变量? [英] How to read an environment variable in Kotlin?

问题描述

我想从我的Kotlin应用程序中的环境变量中获取某个值，但是在

I'd like to get a certain value from an environment variable in my Kotlin app, but I can't find anything about reading environment variables in the core libraries documentation.

我希望它位于 kotlin.system ，但实际上没有那么多.

I'd expect it to be under kotlin.system but there's really not that much there.

推荐答案

使用kotlin中的elvis运算符很容易获得环境值(如果存在)或默认值:

It is really easy to get a environment value if it exists or a default value by using the elvis operator in kotlin:

var envVar: String = System.getenv("varname") ?: "default_value"

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