Question

在我看来，我的侦听器具有ajax行为，该行为会更新bean属性，然后是执行javascript方法的“未完成”动作

这是ajax事件：

<p:ajax event="rowDblselect" listener="#{backController.onRowDoubleClick}"
                                    oncomplete="openNewTab()"  />
<h:inputHidden id="hutchy" value="#{backController.productViewerUrl}" />

这是应该更新属性的bean方法：

public void onRowDoubleClick(final SelectEvent event) {

    RecordDTO currentRecordDTO  = (RecordDTO) event.getObject();
    setProductViewerUrl("https://www.google.com/search?q=" + currentRecordDTO.getName());
}

public String getProductViewerUrl() {
    return productViewerUrl;
}

public void setProductViewerUrl(String productViewerUrl) {
    this.productViewerUrl = productViewerUrl;
}

此后，使用更新属性的javascript方法：

function openNewTab(){
	var url = $('#pbm\\:hutchy').val();
	var hiddenCode = "#{backController.productViewerUrl}";
	alert(url + hiddenCode);
	window.open(url, '_newtab');
}

问题是Javascript代码没有获得属性的更新值（即使带有隐藏字段），我在DoubleClick事件之后进行了一些调试，发现执行未通过执行JS时属性的getter方法（在警报之前）

有人有想法吗？预先感谢！

Answer 1

Try using <f:param name="productViewerUrl" value="#{backController.productViewerUrl}" /> then getting the value in the Bean with

FacesContext fc = FacesContext.getCurrentInstance();
    Map<String, String> params = fc.getExternalContext().getRequestParameterMap();

    this.productViewerUrl= params.get("productViewerUrl");

or binding the values in the datatable

Answer 2

I found a pretty solution for this one, just perform an update to the hidden field after the ajax event so that the view consider the new value of the bean property like:

<p:ajax event="rowDblselect" listener="#{backController.onRowDoubleClick}"
                               update="form:hutchy" oncomplete="openNewTab()"  />

Primefaces在Javascript中获取更新的bean属性

2 个答案: