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From Struts Developer Guide :
"There are two ways you can append one or more dynamically defined query parameters to the hyperlink -- specify a single parameter with the paramId attribute (and its associated attributes to select the value), or specify the name (and optional property) attributes to select a java.util.Map bean that contains one or more parameter ids and corresponding values.
To specify a single parameter, use the paramId attribute to define the name of the request parameter to be submitted. To specify the corresponding value, use one of the following approaches:
- Specify only the paramName attribute - The named
JSP bean (optionally scoped by the value of the paramScope attribute) must identify a value that can be converted to a
String.
- Specify both the paramName and paramProperty attributes - The specified property getter method will be called on the JSP bean identified by the paramName (and optional paramScope) attributes, in order to select a value that can be converted to a String.
If you prefer to specify a java.util.Map that contains all of the request parameters to be added to the hyperlink, use one of the following techniques:
- Specify only the name attribute - The named JSP bean (optionally scoped by the value of the scope attribute) must identify a java.util.Map containing the parameters.
- Specify both name and property attributes - The specified property getter method will be called on the bean identified by the name (and optional scope) attributes, in order to return the java.util.Map containing the parameters.
As the Map is processed, the keys are assumed to be the names of query parameters to be appended to the hyperlink. The value associated with each key must be either a String or a String array representing the parameter value(s), or an object whose toString() method will be called. If a String array is specified, more than one value for the same query parameter name will be created."
Here is a basic example. Of course, in the real world, values added to the HashMap should be dynamic, and probably handled into an Action instead of the JSP :
Resulting HTML will be :