JSF2 – Bean Method Call With Parameter

Un metodo di un bean può ricevere in input parametri da una pagina jsf:
#{bean.method(param)}
Questa  sintassi funziona con Tomcat 7, perchè supporta le EL 2.2 (el-impl-2.2.jar).

passParameter.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:p="http://primefaces.org/ui"
 xmlns:c="http://java.sun.com/jsp/jstl/core">
<h:head/>
<h:body>
 <h:form>
<h:commandButton action="#{passParameterBean.getParameter(gigi)}" />

 </h:form>
</h:body>
</html>
PassParameter.java
package com;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean
@SessionScoped
public class PassParameterBean {
 
 private String name;

 public String getName() {
  return name;
 }

 public void setName(String name) {
  this.name = name;
 }
 
 
 public String getParameter(String name)
 {
  this.name = name;
  
  return "./passParameterResult.xhtml";
 }

}

PassParameterResult.xhtml
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
 xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html"
 xmlns:ui="http://java.sun.com/jsf/facelets"
 xmlns:p="http://primefaces.org/ui"
 xmlns:c="http://java.sun.com/jsp/jstl/core">
<h:head />
<h:body>
 <h:form>
  <h:outputText value="#{passParameterBean.name}" />

 </h:form>
</h:body>
</html>


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