Changing request parameter value in Struts2 interceptor

Question

Does anybody know if it is possible to change/remove request parameter values in a Struts2 interceptor?

The request parameter Map is an instance of Un

Answer 1

May be you can try as this.

public String intercept(ActionInvocation invocation) throws Exception {
    final ActionContext context = invocation.getInvocationContext();
    Map parameters = (Map)context.get(ActionContext.PARAMETERS);

    Map parametersCopy = new HashMap();
    parametersCopy.putAll(parameters);
    parametersCopy.put("myParam", "changedValue");

    context.put(ActionContext.PARAMETERS, parametersCopy);

    return invocation.invoke();
}