Question

In a datatable column how can i display a text for a number value which is retrieved from database.

for eg if the value for a colum from database is 2 , then i need to display “Cheese” in datatable. similarly if the value is 3 then i need to display “cake”.

Answer 1

You need to maintain a mapping of those values in the backing bean.

private Map<Long, String> foods;

public Bean() {
    foods = new HashMap<Long, String>();
    foods.put(1L, "Pizza");
    foods.put(2L, "Cheese");
    foods.put(3L, "Cake");
    // ...
}

public Map<Long, String> getFoods() { 
    return foods;
}

Then you can get it as follows

<h:dataTable value="#{bean.items}" var="item">
    <h:column>
        <h:outputText value="#{bean.foods[item.number]}" />
    </h:column>
</h:dataTable>

Where #{item.number} should return the desired number as Long.