slavisa-baeldung
GitHub
commit
e3b1d3a8dc
|
|
@ -0,0 +1,118 @@
|
||||||
|
/*
|
||||||
|
* To change this template, choose Tools | Templates
|
||||||
|
* and open the template in the editor.
|
||||||
|
*/
|
||||||
|
package com.baeldung.el.controllers;
|
||||||
|
|
||||||
|
import java.util.Random;
|
||||||
|
import javax.annotation.PostConstruct;
|
||||||
|
import javax.faces.application.Application;
|
||||||
|
import javax.faces.application.FacesMessage;
|
||||||
|
import javax.faces.bean.ManagedBean;
|
||||||
|
import javax.faces.bean.ViewScoped;
|
||||||
|
import javax.faces.component.html.HtmlInputText;
|
||||||
|
import javax.faces.context.FacesContext;
|
||||||
|
|
||||||
|
/**
|
||||||
|
*
|
||||||
|
* @author Tayo
|
||||||
|
*/
|
||||||
|
@ManagedBean(name = "ELBean")
|
||||||
|
@ViewScoped
|
||||||
|
public class ELSampleBean {
|
||||||
|
|
||||||
|
private String firstName;
|
||||||
|
private String lastName;
|
||||||
|
private String pageDescription = "This page demos JSF EL Basics";
|
||||||
|
private int pageCounter;
|
||||||
|
private Random randomIntGen = new Random();
|
||||||
|
|
||||||
|
@PostConstruct
|
||||||
|
public void init() {
|
||||||
|
pageCounter = randomIntGen.nextInt();
|
||||||
|
}
|
||||||
|
|
||||||
|
public void save(){
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
public void saveFirstName(String firstName) {
|
||||||
|
this.firstName = firstName;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
public void saveByELEvaluation(){
|
||||||
|
firstName = (String)evaluateEL("#{firstName.value}", String.class);
|
||||||
|
FacesContext ctx = FacesContext.getCurrentInstance();
|
||||||
|
FacesMessage theMessage = new FacesMessage("Name component Evaluated: "+firstName);
|
||||||
|
theMessage.setSeverity(FacesMessage.SEVERITY_INFO);
|
||||||
|
ctx.addMessage(null,theMessage);
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
private Object evaluateEL(String elExpression, Class<?> clazz) {
|
||||||
|
Object toReturn = null;
|
||||||
|
FacesContext ctx = FacesContext.getCurrentInstance();
|
||||||
|
Application app = ctx.getApplication();
|
||||||
|
toReturn = app.evaluateExpressionGet(ctx, elExpression, clazz);
|
||||||
|
|
||||||
|
return toReturn;
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @return the firstName
|
||||||
|
*/
|
||||||
|
public String getFirstName() {
|
||||||
|
return firstName;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param firstName the firstName to set
|
||||||
|
*/
|
||||||
|
public void setFirstName(String firstName) {
|
||||||
|
this.firstName = firstName;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @return the lastName
|
||||||
|
*/
|
||||||
|
public String getLastName() {
|
||||||
|
return lastName;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param lastName the lastName to set
|
||||||
|
*/
|
||||||
|
public void setLastName(String lastName) {
|
||||||
|
this.lastName = lastName;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @return the pageDescription
|
||||||
|
*/
|
||||||
|
public String getPageDescription() {
|
||||||
|
return pageDescription;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param pageDescription the pageDescription to set
|
||||||
|
*/
|
||||||
|
public void setPageDescription(String pageDescription) {
|
||||||
|
this.pageDescription = pageDescription;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @return the pageCounter
|
||||||
|
*/
|
||||||
|
public int getPageCounter() {
|
||||||
|
return pageCounter;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param pageCounter the pageCounter to set
|
||||||
|
*/
|
||||||
|
public void setPageCounter(int pageCounter) {
|
||||||
|
this.pageCounter = pageCounter;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,38 @@
|
||||||
|
<?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:f="http://java.sun.com/jsf/core">
|
||||||
|
<h:head>
|
||||||
|
<title>Baeldung | The EL Intro</title>
|
||||||
|
|
||||||
|
</h:head>
|
||||||
|
|
||||||
|
<h:body>
|
||||||
|
<h:form id="elForm">
|
||||||
|
|
||||||
|
|
||||||
|
<h:messages />
|
||||||
|
<h:panelGrid columns="2">
|
||||||
|
<h:outputText value="First Name"/>
|
||||||
|
<h:inputText id="firstName" binding="#{firstName}" required="true" value="#{ELBean.firstName}"/>
|
||||||
|
<h:outputText value="Last Name"/>
|
||||||
|
<h:inputText id="lastName" required="true" value="#{ELBean.lastName}"/>
|
||||||
|
<h:outputText value="Save by value binding"/>
|
||||||
|
<h:commandButton value="Save" action="#{ELBean.save}">
|
||||||
|
|
||||||
|
</h:commandButton>
|
||||||
|
<h:outputText value="Evaluate backing bean EL"/>
|
||||||
|
<h:commandButton value="Save" action="#{ELBean.saveByELEvaluation}">
|
||||||
|
|
||||||
|
</h:commandButton>
|
||||||
|
<h:outputText value="Save by passing value to method"/>
|
||||||
|
<h:commandButton value="Save" action="#{ELBean.saveFirstName(firstName.value.toString().concat('(passed)'))}"/>
|
||||||
|
<h:outputText value="JavaScript (click after saving First Name)"/>
|
||||||
|
<h:button value="Alert" onclick="alert('Hello #{ELBean.firstName}')"/>
|
||||||
|
</h:panelGrid>
|
||||||
|
|
||||||
|
</h:form>
|
||||||
|
</h:body>
|
||||||
|
</html>
|
||||||
|
|
||||||
Loading…
Reference in New Issue