部分更新视图

Created: November-22, 2018

发出 ajax 请求并仅更新视图的一部分。

Bean.java

@ManagedBean
@ViewScoped
public class Bean {

    public Date getCurrentDate() {
        return new Date();
    }

}

sample.xhtml

<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:h="http://xmlns.jcp.org/jsf/html"
    xmlns:f="http://xmlns.jcp.org/jsf/core"
    xmlns:ui="http://xmlns.jcp.org/jsf/facelets">
<h:head />
<h:body>
    <h:form>
        <h:commandButton value="Execute ajax">
            <f:ajax render="output" />
        </h:commandButton>
        <p>
            <h:outputText id="output" value="Ajax date: #{bean.currentDate}" />
        </p>
        <p>
            <h:outputText id="output2" value="Non-Ajax date: #{bean.currentDate}" />
        </p>
    </h:form>
</h:body>
</html>