如何在原子数据表中显示可变数量的列 [英] How to display variable number of columns in primefaces datatable

问题描述

我有以下ArrayList

I have the following ArrayList

class Report{
private String manufacturer;
private String color;
private List<Double> revenue;
}

如何在原子datatable上显示它。我尝试使用p：列它不工作。
我在XHTML页面上有以下代码

How can I display it on primefaces datatable. I tried using p:columns it is not working. I have following code on XHTML page

<p:dataTable value="#{tableBean.reportList}" var="report" id="table">

    <p:column headerText="Manufacturer">#{report.manufacturer}</p:column>

     <p:column headerText="Color">#{report.color}</p:column>
 </p:dataTable >

我也尝试过p：columns和ui：repeat。但是我不能达到理想的输出。

I also tried p:columns and ui:repeat. But I am not able to achieve desired output. result.

<p:columns var="amount" value="#{report.revenue}">#{amount}</p:columns>

<ui:repeat var="amount" value="#{report.revenue}">
<p:column headerText="Revenue">#{amount}</p:column>
</ui:repeat>

我需要输出作为具有制造商名称，颜色和所有收入的表格

I need output as a table with manufacturer name, color and all revenues

推荐答案

你的错误是你引用当前迭代的行（< p：dataTable var> as < p：columns value> 这是不可能的，列的数量不能根据当前迭代的行而变化，只能设置表格范围。< p：columns value> 应该引用一个支持bean中的一个属性，对于一个现实世界的例子，另见这个答案：在JSF2.0中动态创建和填充DataTable 。

Your mistake is that you referenced the currently iterated row (the object behind <p:dataTable var> as <p:columns value>. This is not possible. The amount of columns cannot vary based on the currently iterated row. It can only be set table-wide. The <p:columns value> should reference a property in a backing bean. For a real world example, see also this answer: Creating and populating a DataTable dynamically in JSF2.0.

在特定情况下，您基本上只想使用< ui：repeat> < p：column> ：

In your particular case, you just basically want to use <ui:repeat> inside <p:column>:

<p:dataTable value="#{tableBean.reportList}" var="report">
    <p:column>
        #{report.manufacturer}
    </p:column>
    <p:column>
        #{report.color}
    </p:column>
    <p:column>
        <ui:repeat value="#{report.revenue}" var="revenue">#{revenue}</ui:repeat>
    </p:column>
</p:dataTable>

（如果要以单独的行打印，打印 ＃{revenue} 之后的< br /> ;或者如果要打印它们的逗号分隔，请使用 varStatus ）

(if you want to print them in separate lines, print a <br/> after #{revenue}; or if you want to print them commaseparated, make use of varStatus)

或者可能是嵌套表：

    <p:column>
        <h:dataTable value="#{report.revenue}" var="revenue">#{revenue}</h:dataTable>
    </p:column>

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