发表新帖
发表新帖

How to add a message to a specific component from JSF backing bean

后端 未结
关注
2 1068
盖世英雄少女心
盖世英雄少女心 2020-12-28 16:44

I have an h:inputText and an h:message connected to it:



    <
相关标签:
2条回答
  • 半阙折子戏
    2020-12-28 17:28

    Another way to do that is: give an ID to the form, like "form1", then, when add the message, the clientId is "form1:test".

    0 讨论(0)
  • 刺人心
    2020-12-28 17:29

    You need to provide the so called client id, which you'll find on UIComponent.

    The following is a quick example of how to use this.

    Consider the following bean:

    @ManagedBean
@RequestScoped
public class ComponentMsgBean {

    private UIComponent component;

    public UIComponent getComponent() {
        return component;
    }

    public void setComponent(UIComponent component) {
        this.component = component;
    }

    public String doAction() {

        FacesContext context = FacesContext.getCurrentInstance();

        context.addMessage(component.getClientId(), new FacesMessage("Test msg"));

        return "";
    }

}

    being used on the following Facelet:

    <html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:ui="http://java.sun.com/jsf/facelets" 
    >

    <h:body>

        <h:form>
            <h:outputText id="test" value="test component" binding="#{componentMsgBean.component}"/>
            <h:message for="test"/>

            <h:commandButton value="click me" action="#{componentMsgBean.doAction}" />
        </h:form>

    </h:body>
</html>

    This will add a Faces message with content "Test msg" for the outputText component used in the example.

    0 讨论(0)
 看不清?
提交回复
热议问题