java 如何在 struts2 文本字段标签中放置占位符？
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How can I put a placeholder in a struts2 textfield tag?
提问by Pigueiras
I'm using struts2 tags and want to put a placeholder in a <s:textfield>tag like this:
我正在使用 struts2 标签并想在这样的<s:textfield>标签中放置一个占位符：
<s:set name="email" value="getText('email')" />
...
<s:form action="Login">
<s:textfield key="email" theme="simple" placeholder="%{email}"
cssClass="span3"/>
...
</s:form>
emailis defined in global.propertiesas "Correo electrónico" .
email被定义global.properties为“Correoelectricrónico”。
My problem is that when I see the jsp page, instead of seeing the value of emailI see %{email}.
我的问题是，当我看到 jsp 页面时，而不是看到emailI see的值%{email}。
I read that it was a bug of Struts2 solved in version 2.3.1 here: https://issues.apache.org/jira/browse/WW-3644, but I'm using Struts2 2.3.4 and I keep having the same problem.
我读到这是 2.3.1 版中解决的 Struts2 错误：https: //issues.apache.org/jira/browse/WW-3644，但我使用的是 Struts2 2.3.4 并且我一直有同样的问题问题。
Anyone knows any solution to this problem or any other way for putting the placeholder in the textfield?
任何人都知道此问题的任何解决方案或将占位符放入文本字段的任何其他方式？
回答by javiercbk
I had the same problem and I solved it like this:
我遇到了同样的问题，我是这样解决的：
<s:textfield name="user.email" placeholder="%{getText('settings.email')}" />
I needed up update both my Struts 2 andOGNL jars. My OGNL jar is ognl-3.0.5.jar.
我需要更新我的 Struts 2和OGNL jar。我的 OGNL 罐子是ognl-3.0.5.jar.
回答by Dave Newton
You should be using the #prefix for variables created in the stack namespace but not pushed:
您应该#为在堆栈命名空间中创建但未推送的变量使用前缀：
<s:textfield placeholder="%{#email}" ... etc ... />
