问题描述
根据 s2-026:
即将推出的 Struts 将不再支持使用 top 进行表达式2.5版！
Support for expression using top will be dropped in upcoming Struts version 2.5!
我们在很多 JSP 页面中使用了 top 对象，如下所示(显示了 currencyTypes 的列表并从 Struts 中查找名称消息):
We used the top object in lots of JSP pages as below (which shows a list of currencyTypes and look up the name from Struts messages):
<s:select name = "selectedCurrencyType"
list = "currencyTypes"
listKey = "top"
listValue = "%{getText('acc.currencyType.'+top)}" />
它目前适用于struts 2.3.24.1，但根据上面的评论，上面的选择框是否适用于2.5，或者我们将不再有顶级参考?！
It currently works with struts 2.3.24.1 but according to above comment, will above select box works for 2.5, or we will not have the top reference any more?!
如果这是真的，请告诉我我们应该如何修复上面的 s:select?！
If this is true, please let me know how should we fix above s:select?!
推荐答案
添加了对 top 对象的支持以支持内部操作，它不应该被用户使用(是的，在文档中表示是个坏主意:()
Support for top object was added to support internal operations, it shouldn't be used by users (yes, expressing that in docs was a bad idea :( )
无论如何，看来我们必须准备迁移路径或保持对 top 对象的支持.
Anyway, looks like we must prepare a migration path or keep support for the top object.
这篇关于在 Struts 2.5 中使用顶部对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！