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JSP Scriplets

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posted 15 years ago

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Hi all,

I keep hearing that scriplets are bad way of coding.Is it true?If it is, then where do I write the code?

Thanks.

Be Humble... Be Nice.

Jimmy Clark

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posted 15 years ago

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Code that is typically crammed in a JSP page is either (a) presentation logic or (b) business logic.

In the case of presentation logic, this can be coded in a custom JSP tag class, or a Java servlet.

In the case of business logic, this can be coded in a plain old business object or a Session EJB, or a Web service.

Keep in mind that a Java Server Page is a Java servlet.

Peter Johnson

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posted 15 years ago

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Put your code in a servlet, pass beans that contain things you want on your page to a JSP, and use JSTL and the Expression Langauge (EL) in the JSP to display the data.

Quick example. Assume this code in the doGet/doPost:

Then index.jsp would look like:

You can, of course, set multiple attributes, and they can be more complicated than strings (example, a collection of objects/JavaBeans obtained from a database). The JSTL and EL provide mechanism to extract data from collections and any JavaBean. By doing this you can avoid server-side script within JSPs.
[ October 08, 2008: Message edited by: Peter Johnson ]

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