我有以下问题.当我单击"Enviar"按钮时,这将调用与selectOneMenu相关联的另一个方法(在属性valueChangeListener中称为"validarSelect"),然后调用此按钮在属性actionListener中关联的方法"validarBoton".我想知道,为什么会这样.我希望valueChangeListener不会被调用,因为我没有更改下拉列表.
这是我的页面JSF:
<?xml version='1.0' encoding='windows-1252'?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<f:view xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html">
<html xmlns="http://www.w3.org/1999/xhtml">
<h:head></h:head>
<h:body>
<h:form>
<h:commandButton value="Enviar..." id="validar" actionListener="#{Domiciliacion.validarBoton}"/>
<h:selectOneMenu valueChangeListener="#{Domiciliacion.validarSelect}"
binding="#{Domiciliacion.selectCombo}">
<f:selectItems value="#{Domiciliacion.lista}"/>
<f:ajax event="valueChange" render="@this"/>
</h:selectOneMenu>
</h:form>
</h:body>
</html>
这就是ManagedBean:
package domiciliaciontest;
import java.util.ArrayList;
import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.component.html.HtmlSelectOneMenu;
import javax.faces.event.ActionEvent;
import javax.faces.event.ValueChangeEvent;
@ManagedBean(name = "Domiciliacion")
@ViewScoped
public class MB0001 {
private HtmlSelectOneMenu selectCombo;
private List<String> lista = new ArrayList<String>();
public MB0001() {
super();
System.out.println("Entro al constructor..."); …