java - JSF 中的交叉字段验证 h :dataTable

Question

我有一个 XHTML 页面，其中有四个文本框

<h:column >  
    <f:facet name="header">  
       <h:outputText value="Start Date" />  
    </f:facet>
    <h:inputText id="startDate" value="#{sampleVO.startDate}" />
</h:column>         
<h:column >  
    <f:facet name="header">  
       <h:outputText value="End Date" />  
    </f:facet>
    <h:inputText id="endDate" value="#{sampleVO.endDate}" />
</h:column>        
<h:column >
    <f:facet name="header">  
        <h:outputText value="Start Date" />  
    </f:facet>
    <h:inputText id="startDate1" value="#{sampleVO.startDate}" />
</h:column>         
<h:column >  
    <f:facet name="header">
       <h:outputText value="End Date" />  
    </f:facet>
    <h:inputText id="endDate1" value="#{sampleVO.endDate}" />
</h:column>        

我需要对开始日期和结束日期进行验证。如果用户在 id="startDate"& id="endDate"中输入一些开始和结束日期，可以说开始日期:"01/01/2012"(1jan) 和结束日期:01/31/2012 并且如果用户输入一些日期在 id="startDate1"和 id="endDate1"上 id="startDate1"应始终大于 id="endDate"即日期范围不应重叠

public class SampleServiceimpl implements SampleService {
    private List<SampleVO> listOfSample;

     //this function gets called when clicked on Submit button on XHTML page
     public Void submit() {
        // how can i call datesOverLaps function to check entered
        // start date and End date not overlapping, Also how to
        // display the error message on XHTML page using FacingContext
     }

     public boolean datesOverlaps(List<SampleVO> sampleVO) {
        final Date early = sampleVO.getStartDate();
        final Date late = sampleVO.getEndDate();

        for(SampleVO existing : sampleVO) {
            if(!(early.isAfter(existing.getEnd())) ||
                     (late.isBefore(existing.getStart()))){
                return true;
            }
        }
        return false;
    }
}

不确定上面的 boolean 函数是否是当前的，是否可以在场景中工作。任何帮助将不胜感激。

Answer 1

我在这上面花了 6 个小时。但我解决了。我的英语不好。

1. 在dataTable上添加绑定(bind)属性，指向backingbean中的UIDData字段(绑定(bind)表)

    <h:dataTable value="#{narocilo.podatki}" id="tabela" var="podatek" border="0" bgcolor="#F6FAF0" style="width:100%;" cellspacing="0" cellpadding="2" headerClass="header" rowClasses="#{narocilo.rowClasses}"   columnClasses="align_left,align_right,align_center,align_right,align_right,align_center_konec" **binding="#{narocilo.podatkiData}"**>
   

2. 表单广告结束前

   <h:inputHidden id="validator" **validator="#{narocilo.validateKolicinaCena}"** value="morabiti"/>
   

3. backing bean 中的 validator 方法

    public void validateKolicinaCena(FacesContext aContext,UIComponent aComponent,Object aValue) {
   
   int shrani_index = fPodatkiData.getRowIndex();
   
   UIComponent column_kol = fPodatkiData.getChildren().get(2);
   UIComponent column_cen = fPodatkiData.getChildren().get(5);
   
   for(int i=0; i<fPodatkiData.getRowCount(); i++) {
   
       fPodatkiData.setRowIndex(i);
   
       UIInput kolicina_input = (UIInput) column_kol.findComponent("kolicina");
       UIInput cena_input = (UIInput) column_cen.findComponent("cena");
   
       Object kolicina = kolicina_input.getLocalValue();
       Object cena = cena_input.getLocalValue();
   
       if(kolicina == null && cena != null) {
   
           kolicina_input.setValid(false);
   
           FacesMessage sporocilo = Sporocila.getMessage("si.alkimisticus.bitea.error", "javax.faces.component.UIInput.REQUIRED", null);
           sporocilo.setSeverity(FacesMessage.SEVERITY_ERROR);
   
           aContext.addMessage(kolicina_input.getClientId(aContext), sporocilo);
   
       } else if(kolicina != null && cena == null) {
   
           cena_input.setValid(false);
   
           FacesMessage sporocilo = Sporocila.getMessage("si.alkimisticus.bitea.error", "javax.faces.component.UIInput.REQUIRED", null);
           sporocilo.setSeverity(FacesMessage.SEVERITY_ERROR);
   
           aContext.addMessage(cena_input.getClientId(aContext), sporocilo);
   
       } else {
           kolicina_input.setValid(true);
           cena_input.setValid(true);
       }
   
   
   }
   
   fPodatkiData.setRowIndex(shrani_index);}