I want to display java arraylist into JSF page. I generated arraylist from database. Now I want to display the list into JSF page by calling the list elements index by index number. Is it possible to pass a parameter to bean method from an EL expression in JSF page directly and display it?
Add a comment
|
1 Answer
You can access a list element by a specific index using the brace notation [].
@ManagedBean
@RequestScoped
public class Bean {
private List<String> list;
@PostConstruct
public void init() {
list = Arrays.asList("one", "two", "three");
}
public List<String> getList() {
return list;
}
}
#{bean.list[0]}
<br />
#{bean.list[1]}
<br />
#{bean.list[2]}
As to parameter passing, surely it's possible. EL 2.2 (or JBoss EL when you're still on EL 2.1) supports calling bean methods with arguments.
#{bean.doSomething(foo, bar)}
See also:
I however wonder if it isn't easier to just use a component which iterates over all elements of the list, such as <ui:repeat> or <h:dataTable>, so that you don't need to know the size beforehand nor to get every individual item by index. E.g.
<ui:repeat value="#{bean.list}" var="item">
#{item}<br/>
</ui:repeat>
or
<h:dataTable value="#{bean.list}" var="item">
<h:column>#{item}</h:column>
</h:dataTable>
