JSF DataTable将不显示值

Question

我在xhtml页面中有一个<p:dataTable> in。该表将不显示支持bean的值。我已经调试到这样的程度，即我知道bean的getter正在被调用，而且我还知道这个bean中有一些项。你们知道为什么吗?Netbeans 7.3、JSF2.2、Tomcat 7、jdk1.7、primefaces 4.0.

这是我的表格，这是一个名为'mainForm'的表单

<p:dataTable id="DTsamples" widgetVar="DTsamplesVw" var="sample" value="#{alterSampleController.samples}" 
                             filteredValue="#{alterSampleController.filteredSamples}" paginator="true" rows="20"
                             sortMode="multiple" scrollable="true" rowStyleClass="#{sample.rowColorByType}">
<p:column headerText="Lab Number" footerText="Lab Number" sortBy="labNumber" filterMatchMode="contains" filterBy="labNumber" filterMaxLength="20">  
                        #{sample.labNumber}                            
</p:column> 
<p:column headerText="Container ID" footerText="Container ID" sortBy="containerID" filterMatchMode="contains" filterBy="containerID" filterMaxLength="11">  
                        #{sample.containerID}                            
</p:column> 
<p:column headerText="Sample Type" footerText="Sample Type" sortBy="sampleType" filterMatchMode="contains" filterBy="sampleType" filterMaxLength="50">  
                        #{sample.sampleType}
</p:column> 
<p:column headerText="Field ID" footerText="Field ID" sortBy="fieldID" filterMatchMode="contains" filterBy="fieldID" filterMaxLength="150">  
                        #{sample.fieldID}
</p:column>
<p:column headerText="Sample ID" footerText="Sample ID" sortBy="sampleID" filterMatchMode="contains" filterBy="sampleID" filterMaxLength="150">  
                        #{sample.sampleID}
</p:column>
<p:column headerText="Grower" footerText="Grower" sortBy="grower" filterMatchMode="contains" filterBy="grower" filterMaxLength="50">  
                        #{sample.grower}
</p:column>
~~~A few other columns that don't contain data~~~~
</p:dataTable>

这是一个从搜索

中获取结果的对话框

<h:form id="innerSearch"><p:dialog id="searchDialogID" widgetVar="searchDialog" header="Sample search" resizable="false" draggable="false" showEffect="puff"
                      hideEffect="puff" appendToBody="false" modal="true" rendered="#{alterSampleController.allowReading eq true}">
~~~Bunch of inputTexts and selectoneMenus to get search details                
<p:commandButton update=":mainForm" process="innerSearch" icon="ui-icon-search" value="Search" actionListener="#{alterSampleController.loadSearch}" oncomplete="searchDialog.hide()"/>
</p:dialog>
</h:form>

相关后台Bean

@ManagedBean
@ViewScoped

public class AlterSampleController implements Serializable {    
private ArrayList<SampleAlter> _samples;
 private ArrayList<SampleAlter> _filteredSamples;
public void loadSearch() {
    UIComponent table = FacesContext.getCurrentInstance().getViewRoot().findComponent(":mainForm:DTsamples");
    table.setValueExpression("sortBy", null);
    if (_samples != null) {
        _samples.clear();
    }
    _samples = _saHelper.searchList(getSearch());

    }
    getAgronomers().clear();
    getGrowers().clear();
}
    public ArrayList<SampleAlter> getSamples() {
    return _samples;
}
    public ArrayList<SampleAlter> getFilteredSamples() {
    return _filteredSamples;
}

public void setFilteredSamples(ArrayList<SampleAlter> filteredSamples) {
    this._filteredSamples = filteredSamples;
}
}

Answer 1

我正在使用netbeans 7.3，并选择更新netbeans。我知道通常情况下这不会对代码产生任何影响，但它确实产生了影响;一切都很好，直到我更新。我不得不做一个完整的卸载和重新安装netbeans。我不认为这是一个解决方案，但如果其他人运行7.3做了最近的更新，一切都停止工作尝试做一个完整的卸载和重新安装。