h：dataTable中具有动态列的JSF ResultSet

Question

I am currently trying to display a ResultSet in ah:dataTable in JSF.

Basically what I am doing is executing a SQL statement which can be inserted on the website and I want to display the result of that in a table. I can not create model classes because the tables that are used are also dynamic. The tricky part is the fact, that I do not know how many columns there are in the ResultSet, nor the datatypes(currently I am getting these from the ResultSetMetaData).

How would I go about displaying something with dynamic columns and column content(different datatypes) in a table on a website using JSF?

Thanks in advance.

Answer 1

Have a data structure like List<Map<String, Object>> results in your managed bean to store the results. On UI side, use 2 nested ui:repeat elements instead of an h:dataTable . Outer repeat will loop rows ( results ), inner repeat will loop columns ( result.keySet() ), each cell will get its value by result.get(fieldName) .

Not-tested UI code:

<table>
    <ui:repeat value="#{mb.results}" var="result"> 
        <tr>
            <ui:repeat value="#{result.keySet()}" var="fieldName">
                <td>
                    #{result.get(fieldName)}
                </td>
            </ui:repeat>
        </tr>
    </ui:repeat>
</table>