java Primefaces p:menuitem 将属性传递给 actionListener
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Primefaces p:menuitem pass an attributes to actionListener
提问by Chirag Loliyana
I would like to pass some attributes to actionListener method.
我想将一些属性传递给 actionListener 方法。
My implementation is like...
我的实现就像...
<c:forEach items="${customerProductsBean.userProductList}" var="userProduct">
<p:panel toggleable="#{true}" toggleSpeed="500" header="#{userProduct.product}" >
// Some Code... Data Table and Tree Table
<f:facet name="options">
<p:menu>
<p:menuitem value="ProductSetup" actionListener="#{customerProductsBean.getProductSetupData}" >
<f:attribute name="userIdParam" value="#{data.userId}"/>
<f:attribute name="geCustomerIdParam" value="#{data.geCustomerId}"/>
<f:attribute name="acpProductParam" value="#{data.acpProduct}"/>
</p:menuitem>
<p:menuitem value="Remove Product" url="#" onclick=""/>
</p:menu>
</f:facet>
</p:panel>
</c:forEach>
And in Java Action Listener
在 Java 动作监听器中
public void getProductSetupData(ActionEvent actionEvent) {
try {
String userIdParam =
(String)actionEvent.getComponent().getAttributes().get("userIdParam");
String geCustomerIdParam =
(String)actionEvent.getComponent().getAttributes().get("geCustomerIdParam");
String acpProductParam =
(String)actionEvent.getComponent().getAttributes().get("acpProductParam");
} catch(Exception e) {
// Exception
}
}
I tried it using <f:attribute>and <f:param>but was not able to get the value in Java.
我尝试使用它<f:attribute>，<f:param>但无法在 Java 中获取该值。
In java It shows null for each value.
在java中它为每个值显示null。
回答by BalusC
This won't work if #{data}refers to the iterating variable of an iterating JSF component such as <h:dataTable var>. The <f:attribute>is set during JSF view build time, not during JSF view render time. However, the <h:dataTable var>is not available during view build time, it is only available during view render time.
如果#{data}引用迭代 JSF 组件的迭代变量，例如<h:dataTable var>. 该<f:attribute>期间JSF视图生成时设置，而不是JSF视图中渲染时间。但是，<h:dataTable var>在视图构建期间不可用，它仅在视图渲染期间可用。
If your environment supports EL 2.2, do instead
如果您的环境支持 EL 2.2，请改为
<p:menuitem ... actionListener="#{customerProductsBean.getProductSetupData(data)}" />
with
和
public void getProductSetupData(Data data) {
// ...
}
Or if your environment doesn't, do instead
或者，如果您的环境没有，请改用
public void getProductSetupData(ActionEvent event) {
FacesContext context = FacesContext.getCurrentInstance();
Data data = context.getApplication().evaluateExpressionGet(context, "#{data}", Data.class);
// ...
}
