具有List< List>的动态列在< p:dataTable>< p:columns>中 [英] Dynamic columns with List<List> in <p:dataTable><p:columns>

问题描述

我正在尝试使用dinamycally生成带有列的dataTable，所以我有一个List<List> 当List内的List是我的列的内容时，但是当我尝试显示它时，我显示的内容不会太多.

I'm attempting to generate a dataTable with columns dinamycally, so I've a List<List> when a List inside of a List is the content of my column, but when I try to show it I can't display not much.

所以，这是我的Bean的代码:

So, this is the code of my Bean:

@ManagedBean
@javax.faces.bean.ViewScoped
public class Controlador {

   private List<List> estadistico;

   @PostConstruct
   public void inicializar(){
      this.estadistico = new ArrayList<List>();

      this.estadistico.add(  Arrays.asList( new Integer[]{0,1,24})); 
      this.estadistico.add(  Arrays.asList( new Integer[]{5,1,34})); 
      this.estadistico.add(  Arrays.asList( new Integer[]{12,1,4})); 

   }
   //getter's and setter's
}

这是视图:

<h:form>
    <!-- estadistico is  List<List> -->
    <p:dataTable value="#{controlador.estadistico}" var="lista">
        <!-- lista is List of numbers
             and I suppose that value is each number
         -->
        <p:columns value="#{lista}" var="value" >
               #{value}
        </p:columns>
    </p:dataTable>
</h:form>

我希望有些像:

---------------
0     5    12 
---------------
1     1    1
---------------
24    34   4
---------------

我在做什么错了?

正确的方法是什么?

推荐答案

<p:columns value>无法引用<p:dataTable var>.从技术和逻辑上讲，不可能逐行控制列.必须在每个表的基础上对其进行控制.

The <p:columns value> cannot refer the <p:dataTable var>. It is technically and logically not possible to control the columns on a per-row basis. They have to be controlled on a per-table basis.

如果您的模型保证每个嵌套列表的大小都相同，则应该这样做:

If your model guarantees that every nested list has the same size, then this should do:

<p:dataTable value="#{controlador.estadistico}" var="lista">
    <p:columns value="#{controlador.estadistico[0]}" columnIndexVar="i">
        #{lista[i]}
    </p:columns>
</p:dataTable>

另请参见 <p:columns>展示柜.

See also the <p:columns> showcase.

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