在Play 2模板中格式化Double的正确方法是什么 [英] What is the proper way to format a double in a Play 2 template

问题描述

这是我在Play 2模板中的缩写代码...

Here is my abbreviated code from a Play 2 template...

@(variable: com.mypackage.Variable) 

<div class='statsbody'>
    <div class='statsform'>
        <label>Average:</label>
        <span>@"%.2f".format(variable.getAverage())</span>
    </div>
</div>

我收到一个编译错误:

`identifier' expected but `"' found

我从这个问题中得到了上面的想法，其中指出了如何可以在scala命令提示符下执行此操作，这很好，但是在模板中不起作用.

and I got the idea above from this question, which says how to do it at the scala command prompt, which is great, but doesn't work in a template.

getAverage()方法属于我正在使用的外部Java程序包，它返回原始的double.一切正常，没有格式，我可以愉快地显示正确的数字.

The getAverage() method belongs to an external Java package I am using and it returns a raw double. This all works fine and without the formatting I can happily display the right numbers.

我尝试了多种选择，包括使用静态Java String格式化方法...

I have tried a variety of alternatives including using the static Java String formatting method...

@String.format("%.2f", variable.getAverage())

...给了

Overloaded method value [format] cannot be applied to (String, Double)

所以我的问题是，在Play 2模板中格式化双打的正确方法是什么?我知道我可能会使用Javascript，但是我想知道是否有Play/Scala解决方案.

So my question is, what is the proper way to format a double in a Play 2 template? I know I could probably use Javascript, but I'd like to know if there's a Play/Scala solution to this.

推荐答案

使用方括号:

@("%.2f".format(variable.getAverage()))

或:

@{
  "%.2f".format(variable.getAverage())
  //more scala code
}

它允许您在模板中编写多语句scala代码.

which allows you to write multi-statement scala code in template.

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