From scriptlet to Javabean

Question

I have the following scriptlet in my JSP:

<% for (int i=0; i<emailSettings.qualified_apn.length; i++) { %>
    var g ='<%= emailSettings.qualified_apn[i] %>'
    //some code
<% } %>

I moved the variable emailSettings into a bean... so now, how do I change the loop?

Answer 1

You should be using JSTL to browse the list instead of using scriptlets, which are considered a very bad practice... All the bussiness logic should be encapsulated into classes, and the JSP should only contain presentation logic...

You should move all your //some code to Java classes, and once you have collected into classes all the values you want to show in your page, you can use JSTL like this:

<c:forEach var="item" items="${emailSettings.qualified_apn}">
    <p>Item foo: ${item.foo}</p>
    <p>Item bar: ${item.bar}</p>
    ...
</c:forEach>

Remember you have to import the JSTL core library into your JSP with:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

Also note that, as commented by @JBNizet, you'll need a getter for the qualified_apn field in your EmailSettings class (you should never use public fields!). Also consider respecting the Java naming conventions: no underscores in variables and methods (i.e., qualifiedApn).

I suggest you to start reading through the Oracle's official JSTL documentation. Furthermore, you can find many tutorials about JSTL on the web just googling "JSTL tutorial", such as on tutorialspoint.com.