Struts 2“％”标志和'＃“登录OGNL [英] Struts 2 "%" sign and '#" sign in OGNL

问题描述

任何人都可以告诉我如何在STRUTS2 OGNL中使用％和＃符号？我谷歌周围，但找不到任何有价值的信息。或者给我一个文件的链接。

Anybody can tell me how to use "%" and "#" sign in STRUTS2 OGNL? I google around, but can't find any valuable info about this.Or give me a link of documentation of this.

谢谢

推荐答案

％字符强制进行OGNL评估，因此< s：property name = ％{foo}/> 将在堆栈中查询 foo 属性。它并不总是需要的（实际上很少），但为了清晰起见，它更容易一致地使用它。

The % character forces OGNL evaluation, so <s:property name="%{foo}"/> will query the stack for a foo property. It's not always required (rarely, in fact), but it's easier to use it consistently for clarity.

＃ character访问名为值的堆栈上下文变量，例如，您曾经需要它来访问使用< s：set> 标签。您需要它来访问会话变量之类的内容，例如< s：property name =＃session.user.name/> 。

The # character accesses a named value stack context variable, for example, you used to need it to access a variable created using the <s:set> tag. You need it to access things like a session variable, like <s:property name="#session.user.name"/>.

• S2 OGNL文档


• 特定于S2的OGNL文档


• OGNL参考文档

• S2 OGNL Docs
• S2-specific OGNL Docs
• OGNL reference docs

这篇关于Struts 2“％”标志和'＃“登录OGNL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IT屋！