Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Developer's Guide

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## Invoking a Servlet with a URL

You can call a servlet deployed to the Application Server by using a URL in a browser or embedded as a link in an HTML or JSP file. The format of a servlet invocation URL is as follows:

    http://server:port/context-root/servlet-mapping?name=value

The following table describes each URL section.

Table 5–1 URL Fields for Servlets Within an Application

URL element | Description
--- | ---
server`:`port | The IP address (or host name) and optional port number. To access the default web module for a virtual server, specify only this URL section. You do not need to specify the context-root or servlet-name unless you also wish to specify name-value parameters.
context-root | For an application, the context root is defined in the `context-root` element of the `application.xml` or `sun-application.xml` file. For an individually deployed web module, the context root is specified during deployment. For both applications and individually deployed web modules, the default context root is the name of the WAR file minus the `.war` suffix.
servlet-mapping | The `servlet-mapping` as configured in the `web.xml` file. You can use the `servlet-name` instead if you enable the `InvokerServlet`; see Using the default-web.xml File.
`?`name`=`value`...` | Optional request parameters.

In this example, `localhost` is the host name, `MortPages` is the context root, and `calcMortgage` is the servlet mapping:

    http://localhost:8080/MortPages/calcMortgage?rate=8.0&per=360&bal=180000

When invoking a servlet from within a JSP file, you can use a relative path. For example:

    <jsp:forward page="TestServlet"/>
    <jsp:include page="TestServlet"/>

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