Question

I am developing a JSF application which has a servlet to display binary images. I have it working with one parameter but wanted to pass two parameters. It only seems to get the first parameter. My mapping looks like this.

<servlet>
    <servlet-name>imageServlet</servlet-name>
    <servlet-class>com.myapp.system.ImageServlet</servlet-class>
</servlet>

<servlet-mapping>
    <servlet-name>imageServlet</servlet-name>
    <url-pattern>/image/*</url-pattern>
</servlet-mapping>

When I call the servlet it looks like this

<p:graphicImage value="image?app=avatar?id=#{bean.imgId}" />

In my servlet I get the parameters like so

 String id = request.getParameter("id");
 String app = request.getParameter("app");

If I output the app string it displays this

 avatar?id=166

How can I allow the servlet url-patter to take in two values and be able to parse them using the getParameter method. Thanks.

Answer 1

The format for encoding URL parameters is to separate key-value pairs with an ampersand (&):

<p:graphicImage value="image?app=avatar&id=#{bean.imgId}" />