Read a file form web-app

问题

Inside a grails application, I need to upload a file under web-app/js, add a prefix, and put it in S3. I'm having trouble figuring out how to read the js file in a way that will work in development (/web-app/js) and production (/js). I'm doing this from inside a domain object.

回答1:

In your controllers, you can call :

def jsFolder = grailsAttributes.getApplicationContext().getResource("js/").getFile()

and then proceed with jsFolder. To determine the base directory of a running Grails application, use

String dir = applicationContent.getResource("/").getFile()

Getting the js path from a service is a little bit tricky:

You need to implement the ApplicationContextAware interface like this :

class MyService implements ApplicationContextAware {
ApplicationContext applicationContext

However, calling this code from a domain class is not a good idea (see this thread for some explanations) and I am not even sure if it's possible except from getting paths from manual configurations

Hope it helps.

来源：https://stackoverflow.com/questions/2573812/read-a-file-form-web-app