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i want to pass GET parameter from URL to a method, that called by clicking on button. For example i have URL: /someurl/semepage.xhtml?id=1. And i have a button on my page:
<p:commandButton value="say it" action="#{test.sayIt(param['id'])}"/>
The bean looks like:
@ManagedBean
@ViewScoped
public class Test{
public void sayIt(String value){
System.out.println(value);
}
}
But when i am clicking on button, its just not react. Why is this happen ? Method even not called.
If i pass arguments staticaly like here:
<p:commandButton value="say it" action="#{test.sayIt('someword')}"/>
everything is ok.
616
Here is one way - using the <f:param, like this:
<h:commandButton value="Test The Magic Word" action="#{test.sayIt}">
<f:param name="id" value="#{param['id']}"></f:param>
<f:ajax execute="something" render="something_else"></f:ajax>
</h:commandButton>
And in your bean
HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext()
.getRequest();
String id = request.getParameter("id");
@Daniel's response is OK, but here it goes a simpler JSF 2-ish alternative for your case, using <f:viewParam /> and EL parameter passing. Note the <f:ajax /> is not needed in this case, as <p:commandButton /> has ajax behaviour by default.
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core"
xmlns:p="http://primefaces.org/ui">
<h:head />
<h:body>
<f:metadata>
<f:viewParam name="id" />
</f:metadata>
<h:form>
<p:commandButton value="say it" action="#{bean.sayIt(id)}" />
</h:form>
</h:body>
</html>
@ManagedBean
@ViewScoped
public class Bean implements Serializable {
public void sayIt(String value) {
System.out.println(value);
}
}
Tested with JSF 2.2.5 and Primefaces 4. Remember changing tag namespaces in case of using JSF 2.1.x.
26
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