我该如何实施以下内容？

Question

I have a java program that has some number of classes. Three methods taken input A and give output B. I need to make these methods available as a web service so that I can ask something like http://test.com/method?input=A and the result B is returned. I don't want to re-write my existing code. Is there something which is available such as a web service framework for JAVA that can allow me to create a web service interface for these three methods. What is the easiest way?

I have ran into many acronyms and other stuff during my research such as dynamic project, JAVA EE, Glassfish etc... What can implement my requirement? Thanks!

Answer 1

The easiest way to do quick Java services I've found is Restlet .

You can use their tutorials to get a webserver up and running like literally 20 minutes from scratch. The Restlet below should work right out of the box as a skeleton framework. You'll replace the call of String b = ... of course, and replace it with your own library.

public class Main extends Application {

    public static void main(String[] args) {
        Main main = new Main();
        main.start();
    }

    private void start() {
        Component c = new Component();
        c.getServers().add(Protocol.HTTP, 80);
        Application app = new Main();
        c.getDefaultHost().attach(app);
        c.start();
    }

    public Restlet createInboundRoot() {
        Router router = new Router(getContext());
        router.attach("/method/{input}", new Restlet(getContext()) {
            public void handle(Request request, Response response) {
                String a = request.getAttributes().get("input").toString();
                String b = MyLibraries.compute(a);
                response.setEntity(b, MediaType.TEXT_HTML);
            }
        });
        return router;
    }

}

Answer 2

如果您在Java EE 6服务器上运行，则可以使用JAX-RS： http : //docs.oracle.com/javaee/6/tutorial/doc/gilik.html

Answer 3

You will probably need some sort of web framework -- Glassfish is one example. Basically, your application is not built to receive web requests, so you need some sort of container (eg a Servlet Container like Tomcat http://en.wikipedia.org/wiki/Web_container ).

I think "restlet" is a little servlet container that might suit your needs.

Check it out: http://www.restlet.org/