Navigate to other view passing a parameter

Question

My current environment is JRE 1.7, JSF 2.2, Eclipse Luna. In a certain page (entity_index.xhtml) of my application I have the following (PrimeFaces) button:

Answer 1

p:commandButton performs a POST request. You want simply to GET a view with your entity detail, not to POST the server, so you need a h:link:

<h:link value="Details" outcome="entity_details" target="_blank">
    <f:param name="id" value="#{entity.id}" />
</h:link>

Then, the f:viewParam in the destination page will be able to process the url parameter:

<f:metadata>
    <f:viewParam name="id" value="#{entityDetailsMB.id}"/>
    <f:viewAction action="#{entityDetailsMB.init}" />
</f:metadata>

Use a f:viewAction to initialize your entity instead of doing it in a getter, which is discouraged:

public void init(){
    entity = entityById(id);
}

See also:

• Choosing how to pass parameters to a target bean/page using JSF
• When to use f:viewAction / preRenderView versus PostConstruct?