Call JavaBean methods from JSP

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Tutorial: Call JavaBean methods from JSP

Call JavaBean methods from JSP 2.0 pages

Tutorial Details:

Develop custom tags with dynamic attributes
he new JavaServer Pages (JSP) version incorporates the expression language (EL) introduced by the JSP Standard Tag Library (JSTL) to let Web designers produce scriptless JSP pages that don't contain Java code. Since JSP 2.0 provides backward compatibility to JSP 1.x, you may still include Java snippets in your pages, but tag handlers and JavaBean components are much better places for Java-based functionality.

JSP 2.0 provides new features for tag handlers such as dynamic attributes, the Simple Invocation Protocol, and .tag files. You still use the old JSP 1.0 standard actions for creating JavaBean instances and setting their properties, but now you can access bean properties, request parameters, and JSP attributes/variables with the new expression language.
All those JSP technology improvements let you achieve the goal of separating the JSP/HTML markup from the Java code. One thing is missing, however. JSP 2.0 has no syntax for calling a public nonstatic JavaBean method from a scriptless JSP page. This article solves that issue by providing a JSP 2.0 simple tag with dynamic attributes.

Note: You can download this article's source code from Resources .
Expression language needed
Suppose you have a java.util.List instance you must present as an HTML list. Here is a quick solution based on JSP 1.x:

<%= elem %>

Existing JSP-based Web applications consist of Java code mixed with HTML markup like the above code fragment.

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