Java 如何在 jsf 呈现的属性中指定来自 2 个不同 bean 的条件？
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How do I specify conditions from 2 different beans in a jsf rendered attribute?
提问by rojoca
I want to do something along the lines of the following but when I use it like this I get a parse error telling me an entity needs to directly follow the '&' character:
我想按照以下方式做一些事情，但是当我像这样使用它时，我收到一个解析错误，告诉我一个实体需要直接跟随“&”字符：
<ice:selectManyCheckbox
rendered="#{!bean1.condition1 && bean2.condition2}"
value="#{bean1.selected}">
<f:selectItems value="#{bean2.items}" />
</ice:selectManyCheckbox>
How can I get rendered to check conditions from 2 different beans?
如何渲染以检查来自 2 个不同 bean 的条件？
采纳答案by karim79
Use 'and' instead:
改用“和”：
<ice:selectManyCheckbox rendered="#{!bean1.condition1 and bean2.condition2}" value="#{bean1.selected}">
回答by Romain Linsolas
回答by snehasish
Maybe you are using facelets which assumes every jsp page after compilation is a xml file. And you know in an xml file you have to provide an xml entity name just after the &symbol. So to escape this situation use &in place of &.
也许您正在使用 facelets，它假定编译后的每个 jsp 页面都是一个 xml 文件。您知道在 xml 文件中，您必须在&符号后提供一个 xml 实体名称。因此，要摆脱这种局面的使用&代替&。
