How do I retrieve URL parameters in JSP?

Retrieving URL Parameters in JSP

In JSP, extracting parameters from URLs can be achieved through various methods. One convenient approach is utilizing the implicit "param" object provided by the Unified Expression Language (EL).

Let's consider an example URL: www.somesite.com/Transaction_List.jsp?accountID=5. To retrieve the parameter value "5" using EL:

<code class="jsp">${param.accountID}</code>

EL offers an easy way to access URL parameters as properties of the "param" object. However, if you prefer JSP Scriptlets, you can alternatively use the request.getParameter("accountID") method.

The implicit "param" object maps request parameter names to values, as outlined in the Java EE 5 Tutorial. It is part of a range of implicit objects available to access request information, such as header values, cookies, and scoped variables.

Therefore, to summarize, the "param" object provides a straightforward way to extract parameters from URLs in JSP applications.

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