Java – how to determine the controller (spring) for a given URL

How to use spring defaultannotationhandlermapping to find the controller that will eventually process the given URL

I have this at present, but I think it should be clearer than iterating over 100 request mappings:

public static Object getControllerForAction(String actionURL) {
    ApplicationContext context = getApplicationContext();
    AnnotationHandlerMapping mapping = (AnnotationHandlerMapping) context.getBean("annotationMapper");
    PathMatcher pathMatcher = mapping.getPathMatcher();
    for (Object key: mapping.getHandlerMap().keySet()) {
        if (pathMatcher.match((String) key,actionURL)){
            return mapping.getHandlerMap().get(key);
        }
    }
    return null;
}

Solution

For the purpose of this problem, all interesting methods in defaultannotationhandlermapping and its superclass are protected, so the external code is invisible However, writing a custom subclass of defaultannotationhandlermapping will override these methods and make them public, which will be trivial

Since you need to be able to provide a path instead of a request object, I recommend using the lookuphandler of abstracturlhandlermapping as a good candidate It still needs you to provide a request object and path for it, but the request object is only used to pass to the validatehandler () method, which does nothing, so you may provide null there