FacesMessage侦听器

本文介绍了FacesMessage侦听器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

调试JSF消息的方式是什么.我可以实现一些侦听器并捕获JSF将要显示的所有错误消息吗?

What is the way for debugging JSF messages.Can I implement some listener and catch all error messages that JSF is about to display?

推荐答案

您可以使用 PhaseListener 钩在 beforePhase() /event/PhaseId.html#RENDER_RESPONSE"rel =" noreferrer> PhaseId.RENDER_RESPONSE .

You could with a PhaseListener hook on the beforePhase() of the PhaseId.RENDER_RESPONSE.

例如

public class MessagesListener implements PhaseListener {

    @Override
    public PhaseId getPhaseId() {
        return PhaseId.RENDER_RESPONSE;
    }

    @Override
    public void beforePhase(PhaseEvent event) {
        Iterator<FacesMessage> messageIterator = event.getFacesContext().getMessages();

        while (messageIterator.hasNext()) {
            FacesMessage message = messageIterator.next();
            // ...
        }
    }

    @Override
    public void afterPhase(PhaseEvent event) {
        // NOOP.
    }

}

要使其运行，请在faces-config.xml中进行如下注册:

To get it to run, register it as follows in faces-config.xml:

<lifecycle>
    <phase-listener>com.example.MessagesListener</phase-listener>
</lifecycle>

这篇关于FacesMessage侦听器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！