how can i pass parameters to a groovy server page via a controller that are not an instance of a domain class ?
You put your parameters into the model object map returned to your GSP, for example:
def index = { def hobbies = ["basketball", "photography"]
render(view: "index", model: [name: "Maricel", hobbies: hobbies]) }
Then you get those values accessing them by the name you use in your model map, for example:
My name is ${name} and my hobbies are:
<ul>
<g:each in="${hobbies}" var="hobby">
<li>${hobby}</li>
</g:each>
</ul>
That should display the following:
My name is Maricel and my hobbies are:
- basketball
- photography
The clearest way is probably to return a map from your controller action:
...
def myAction = {
[myGreeting: "Hello there, squire!"]
}
...
Now you can access that parameter in your GSP page (by default myAction.gsp):
...
<p><%= myGreeting %></p>
...
More details here: http://grails.org/doc/latest/guide/6.%20The%20Web%20Layer.html#6.1.3%20Models%20and%20Views
You can do it like this :
In the controller:
def myaction = {
String name = "Tony Danza"
[name: name]
}
In the gsp page you can view the name like so:
<body>
My name is ${name}
</body>
You return the parameters in the closure of the controller that has the same name as the gsp.
来源：https://stackoverflow.com/questions/4624214/gsp-parameter-passing-from-controller