Freemarker迭代hashmap键 [英] Freemarker iterating over hashmap keys

问题描述

Freemarker有两个集合数据类型，列表和哈希映射
有没有办法迭代hashmap键，就像我们对列表一样？

Freemarker has two collection datatypes, lists and hashmaps Is there a way to iterate over hashmap keys just as we do with lists?

所以如果我有一个数据的var让我们说：

So if I have a var with data lets say:

user : {
  name : "user"
  email : "[e-mail]"
  homepage : "http://nosuchpage.org"
}

我想用它们的值打印所有用户的属性。
这是无效的，但目标很明确：

I would like to print all the user's properties with their value. This is invalid, but the goal is clear:

<#list user.props() as prop>
  ${prop} = ${user.get(prop)}
</#list>

推荐答案

编辑： Don'使用此解决方案与FreeMarker 2.3.25及更高版本，特别是 .get（prop）。请参阅其他答案。

Don't use this solution with FreeMarker 2.3.25 and up, especially not .get(prop). See other answers.

您使用内置的键功能，例如这应该工作：

You use the built-in keys function, e.g. this should work:

<#list user?keys as prop>
    ${prop} = ${user.get(prop)}
</#list>  

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