This example shows how to use Primefaces RequestContext#execute() method to invoke Javascript. A RequestContext has several helpful methods. The execute() method can invoke client side Javascript code during an ajax or non-ajax request.
JSF page
src/main/webapp/index.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!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:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<script type="application/javascript">
function handleMsg(msg){
alert(msg);
}
</script>
</h:head>
<h:body>
<h2>RequestContext - Invoking JavaScript from bean example</h2>
<h:form>
<h:outputText value="#{myBean.time}"/>
<br/>
<p:commandButton value="Click Me"
actionListener="#{myBean.handleClick}"/>
</h:form>
</h:body>
</html>
@ManagedBean
@ViewScoped
public class MyBean {
@PostConstruct
public void init() {
RequestContext.getCurrentInstance()
.execute("handleMsg('invoked from post construct');");
}
public void handleClick(ActionEvent actionEvent) {
RequestContext.getCurrentInstance()
.execute("handleMsg('invoked from bean listener');");
}
public String getTime() {
return LocalTime.now().toString();
}
}
To try examples, run embedded tomcat (configured in pom.xml of example project below):
mvn tomcat7:run-war
Output
On page load:
On button click:
Example Project
Dependencies and Technologies Used:
primefaces 6.1 primefaces
jsf-api 2.2.14:
This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
jsf-impl 2.2.14:
This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
