java 如何操作 JSF 标记中的字符串?
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How can I manipulate a String in a JSF tag?
提问by MemoryLeak
Given this code,
鉴于此代码,
<rich:dataTable id="list" value="#{testBeen.dataModel}" var="test" rows="#{testBeen.dataModel.pageSize}">
...
<h:outputText value="#{test.WEEK}" />
I need to manipulate the #{test.WEEK}
and replace character )
with ]
, how can I do this?
我需要操作#{test.WEEK}
和替换字符)
用]
,我该怎么办呢?
I tried the following, but it does not work:
我尝试了以下方法,但不起作用:
<%String a = test.WEEK; a.replace("a", "b"); %>
<%=a %>
How can I get the string from JSF and pass it back to JSF?
如何从 JSF 获取字符串并将其传递回 JSF?
回答by BalusC
For this particular simple purpose, I'd just use the JSTLfunctionstaglib. There's a fn:replace()
function.
对于这个特别简单的目的,我只使用JSTL函数taglib。有一个fn:replace()
功能。
E.g.
例如
<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
...
<h:outputText value="#{fn:replace(test.WEEK, ')', ']')}" />
You should for sure neveruse scriptlets<% %>
in JSF pages.
您绝对不应该在 JSF 页面中使用scriptlet<% %>
。
回答by stacker
You could write a custom Converter and parameterize it by search and replace string. See this introduction JSF for nonbelievers: JSF conversion and validation
您可以编写自定义转换器并通过搜索和替换字符串对其进行参数化。请参阅非信徒的 JSF简介:JSF 转换和验证
回答by kgautron
Good practice would be to do this in the bean rather than the facelet.
好的做法是在 bean 中而不是在 facelet 中执行此操作。