CommandButton的actionListener不起作用

时间:2013-04-23 21:44:35

标签: java jsf converter selectonemenu commandbutton

在我选择h:selectOneMenu中的项目后,不会调用commandButton中的mi actionListener,只有当我按下按钮而没有选择selectOneMenu中的任何选项时它才有效 您可以在下面看到我的代码:

<h:form id="formBtnBusquedaAnomalias">
                <table>
                    <tr>

                        <td>
                                <h:outputLabel id="idEstatusAnomalias" value="Estatus anomalias." />                                     
                                <h:selectOneMenu id="selectOneMenuEstatusAnomalias" 
                                    value = "#{busquedaAnomaliasManageBean.selectedEstatusAnomaliaVO}" >
                                    <f:converter converterId="estatusAnomaliaConverter"/>
                                    <f:selectItem itemLabel="Select one" />
                                    <f:selectItems value="#{busquedaAnomaliasManageBean.lstEstatusAnomaliaVOs}" var="estatusAnomalia"
                                        itemLabel="#{estatusAnomalia.descripcionEstatusAnomalia}" />
                                </h:selectOneMenu>                      
                        </td>

                    </tr>
                    <tr>
                        <td>    
                            <p:commandButton value="Buscar anomalias."
                                    actionListener="#{busquedaAnomaliasManageBean.buscarAnomalias()}" />
                        </td>
                    </tr>
                </table>
            </h:form>

转换器类:

@FacesConverter(value = "estatusAnomaliaConverter")
public class EstatusAnomaliaConverter implements Converter{

@Override
public Object getAsObject(FacesContext ctx, UIComponent component, String value) {
    EstatusAnomaliaVO estatusAnomaliaVO = new EstatusAnomaliaVO();
    estatusAnomaliaVO.seDescripcionEstatusAnomalia(value);
    return estatusAnomaliaVO;
}

@Override
public String getAsString(FacesContext ctx, UIComponent component, Object object) {
    String temp = "";
            if(!object == null)
            {
                 temp = object.toString();
            }
    return temp;
}

}

ManageBean:

@ManagedBean(name=ConstantesManageBeans.MANAGE_BEAN_BUSQUEDA_ANOMALIAS)
@RequestScoped
public class BusquedaAnomaliasManageBean implements Serializable {

/**
 * 
 */
private static final long serialVersionUID = -1955257440354260445L;


public void buscarAnomalias(){
             //...some code here
}
]

1 个答案:

答案 0 :(得分:0)

您的buscarAnomalias方法不遵循ActionListener方法的签名。这是签名:

public void actionListener(ActionEvent event) {
    // ...
}

为了使其有效,只需将ActionEvent参数添加到您的方法中:

public void buscarAnomalias(ActionEvent event) {
    //...some code here
}

如果我是你,我会使用action代替actionListener来执行托管bean操作:

<p:commandButton value="Buscar anomalias."
   action="#{busquedaAnomaliasManageBean.buscarAnomalias()}" />

请注意,使用此方法,您无需在方法中添加ActionEvent event参数。

更多信息:

代码中的另一个问题是,检索所选项目的值时,FacesConverter失败。这是因为您尚未在itemValue中设置<f:selectItems>

<h:selectOneMenu id="selectOneMenuEstatusAnomalias" 
    value="#{busquedaAnomaliasManageBean.selectedEstatusAnomaliaVO}">
    <f:converter converterId="estatusAnomaliaConverter"/>
    <f:selectItem itemLabel="Select one" />
    <f:selectItems value="#{busquedaAnomaliasManageBean.lstEstatusAnomaliaVOs}"
         var="estatusAnomalia" itemValue="#{estatusAnomalia}"
         itemLabel="#{estatusAnomalia.descripcionEstatusAnomalia}" />
</h:selectOneMenu>