How do you enable Cross Origin Requests for a RESTful Web Service?

RESTful web service will include CORS access control headers in its response, when you add a @CrossOrigin annotation to the handler method.

@CrossOrigin(origins = "http://localhost:9000")
    @GetMapping("/greeting")
    public Greeting greeting(@RequestParam(required=false, defaultValue="World") String name) {
        System.out.println("==== in greeting ====");
        return new Greeting(counter.incrementAndGet(), String.format(template, name));
    }

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