我有一个带有按钮和标签的 JSF 页面。当用户按下simulateYearButton
按钮时,标签中显示的值yearLabel
应该递增。
带有按钮和标签的表单如下所示:
<h:form>
<p:commandButton value="Заресетить" id="resetButton"
actionListener="#{entryPage.resetButtonAction}" />
<p:commandButton value="Просимулировать год" id="simulateYearButton"
actionListener="#{entryPage.simulateYearButtonAction}">
<f:ajax event="click" render="yearLabel" />
</p:commandButton>
<h:outputLabel id="yearLabelLabel" for="yearLabel" value="Год:" />
<h:outputLabel id="yearLabel" value="#{entryPage.yearLabel}"
style="font-weight:bold" />
</h:form>
entryPage
豆的代码:
@ManagedBean(name = "entryPage")
@RequestScoped
public class EntryPageController {
...
private int year;
private String yearLabel;
@PostConstruct
public void init()
{
this.yearLabel = "2012";
}
...
public void simulateYearButtonAction() {
LOGGER.debug("EntryPageController.simulateYearButtonAction");
this.year++;
this.yearLabel = Integer.toString(this.year);
}
public String getYearLabel() {
return yearLabel;
}
}
当我按下 时simulateYearButton
,该方法simulateYearButtonAction
被执行(我在输出中看到日志消息),但标签没有更新。
当我按下按钮时,我应该如何修改代码以更新标签?