getRequestDispatcher(String)

RequestDispatcher

Returns a RequestDispatcher object that acts as a wrapper for the resource located at the given path.

 RequestDispatcher dispatch = request.getRequestDispatcher("/tes");

Here "/tes" represents the url-pattern element value of the servlet class.


<servlet-mapping>
    <servlet-name>Test</servlet-name>
    <url-pattern>/tes</url-pattern>
</servlet-mapping>


It represents the path of the servlet class. Since both the base as well as target servlet are in the same package structure by just specifying the url-pattern element value we will be able to access the target servlet.

We shouldn't specify the entire path like

 String str = "/WEB-INF/classes/com/example/posr/Test"

 RequestDispatcher dispatch = request.getRequestDispatcher(str);

To forward a request to a JSP page we use

 RequestDispatcher dispatch = request.getRequestDispatcher("/TestJspOne.jsp");

Here "/TestJspOne.jsp" the slash denotes the Jsp page is at the root of the application.