如何使用primefaces update或jsf render刷新自定义组件？

我尝试用jsf2.1定义一个自定义组件。该组件必须在单击按钮后更新。该组件有一个渲染属性，默认为false，即单击按钮时更新。这是我的密码

<cu:ActionBar id="actionBar" rendered="#{bean.booleanCondition}">
    <!-- some code inside !-->
</cu:ActionBar>

---

如何使其工作？

您不能使用

呈现属性更新组件。这里有解释和解决方案：通常，将
呈现的
组件包装在
中并更新它

<p:commandButton id="myButton" actionListener="#{bean.foo} update=":actionBar"/>

@FacesComponent(value = "ACTION_BAR")
public class ActionBarComponent extends UIPanel {

       @Override
       public void encodeBegin(FacesContext ctx) throws IOException {
             if (ctx == null) {
                    throw new NullPointerException();
             }
             ResponseWriter writer = ctx.getResponseWriter();

             writer.startElement("div", this);
             if (this.getAttributes().get("id") != null) {
                    writer.writeAttribute("id", this.getAttributes().get("id"), "id");
             }
             String styleClass = this.getAttributes().get("styleClass") != null ? "" : " " + this.getAttributes().get("styleClass");
             writer.writeAttribute("class", "actionBar" + styleClass, null);
             writer.startElement("form", this);
             writer.writeAttribute("enctype", "application/x-www-form-urlencoded", null);
             writer.writeAttribute("method", "post", null);
             writer.writeAttribute("name", "actionBarForm", null);
             if (this.getAttributes().get("id") != null) {
                    writer.writeAttribute("id", this.getAttributes().get("id") + ":" + this.getAttributes().get("id") + "Form", "id");
             }
             writer.writeAttribute("action", ctx.getExternalContext().getRequestContextPath() + ctx.getExternalContext().getRequestServletPath(), null);
             writer.startElement("div", this);
             writer.writeAttribute("class", "actionBarGroup", "class");
             writer.startElement("span", this);
             writer.append("Actions :");
             writer.endElement("span");

       }

       @Override
       public void encodeEnd(FacesContext ctx) throws IOException {
             if (ctx == null) {
                    throw new NullPointerException();
             }
             ResponseWriter writer = ctx.getResponseWriter();

             writer.endElement("div");
             writer.endElement("form");
             writer.endElement("div");
       }
}