Java Servlets - Storing a list of values in web.xml (multiple param-value's for single param-name)

Question

I\'m creating a servlet that needs to load configuration information. Part of the configuration information I need is a list of Strings (specifically, a list of hostnames and/or

Answer 1

Yes, just use delimiters (as no other options available for this):

<context-param>
    <param-name>validHosts</param-name>
    <param-value>example1.com,example2.com,example3.com</param-value>
</context-param>



then simply
String[] validHosts = param.split(","); // not really much to do

Answer 2

Servlet spec says that you can have only one value for any context parameter. So, you are left with going with delimited list only.

<context-param>
  <param-name>validHosts</param-name>
  <param-value>example1.com,example2.com,.....</param-value>
</context-param>

Answer 3

You should use ; to separate them in param-value tag like:

<context-param>
  <param-name>validHosts</param-name>
  <param-value>example1.com;example2.com;.....</param-value>
</context-param>

Answer 4

Put each param on its own line. I did the following recently and it works fine:

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        /WEB-INF/spring-beans.xml
        /WEB-INF/security-config.xml    
    </param-value>
</context-param>