How do I pass get request parameters to my Velocit

问题:

I have a JSP and in that JSP I have a link which looks something like

http://mydomain.com/verify.do?email=emailid&id=123

Now when users clicks that link, it goes to my velocityview servlet, now my question is how do I pull out those parameters in velocity servlet and put it into the context so that I can send it to my template.

I tried getparameter,#set(#request.getAttribute(email) etc.But for some reason I dont see the value getting into the context or template.

I know there is velocity parameter tool out there,but I am not able to find as how to install and use it.So appreciate if someone can point me to right direction.

回答1:

The solution is the Velocity context. In your backing Java class or Velocity servlet, read in the parameters and put them in the context:

context.put("email", request.getParameter("email"));
context.put("id", request.getParameter("id"));

Then in your Velocity template you can reference them as $email and $id.

回答2:

In the accepted answer you have to explicitly unwind all the arguments in your controller. So if you have 5 fields, you have 5 of the above statements.

I would suggest:

context.put("request", request);

Then in your template something like this:

<p>Is the Jump Run Heading Good? <b>$request.getParameter("heading")</b></p>  

Maybe you could write a little macro to avoid that last little bit of ugliness. You write a little helper function to loop through the request parameters names with getParameterNames() and call getParameter() on each.