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copied!<p>As mentioned in <a href="https://stackoverflow.com/questions/911424/which-is-the-best-way-to-implement-soap-web-services-on-jboss-seam">the other question</a> you could use JAX-WS. However if you'd rather use REST services (JAX-RS) then either:</p> <ul> <li>Read up on JAX-WS in the <a href="http://docs.jboss.com/seam/2.1.2/reference/en-US/html/webservices.html" rel="nofollow noreferrer">Seam Docs</a></li> <li>Check out Stéphane Épardaud's article <a href="http://blog.lunatech.com/2008/03/20/restful-web-services-java-ee-resteasy-jax-rs" rel="nofollow noreferrer">here</a>; or</li> <li>Have a look at Sun <a href="http://jersey.java.net/" rel="nofollow noreferrer">Jersey</a> which is an implementation of JAX-RS.</li> </ul> <p><strong>EDIT</strong>: Norman Richards from the Seam team has just posted a <a href="http://in.relation.to/Bloggers/RESTSupportInLatestSeam21" rel="nofollow noreferrer">blog article about Seam and JAX-RS</a>. Looks fantastic and probably more what you are after than Jersey.</p> <p>I had a look at Jersey last week and was amazed at how little code you need. Here's a little guide:</p> <ol> <li>Download the Jersey Jars and the JAXB Jars (so you can output XML and/or JSON) and add them to your classpath</li> <li>Add the Jersey servlet to your web.xml (in the example below with a <code>url-pattern</code> of <code>service/*</code>)</li> <li>Annotate the Bean that holds your data with JAXB annotations</li> <li>Create a Service class with the Jersey annotations.</li> </ol> <p>Here's an example of a Service:</p> <pre class="lang-java prettyprint-override"><code>@Path("/users") public class UsersService { @GET @Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML}) public Users getUsers() { return UserQuery.getUsers(); } } </code></pre> <p>Where this is the Users class:</p> <pre class="lang-java prettyprint-override"><code>@XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "users") public class Users { @XmlElement(name="users") private List<User> users = new ArrayList<User>(); public List<User> getUsers() { return this.users; } public void setUsers(List<User> users) { this.users = users; } } </code></pre> <p>And this is the User class:</p> <pre class="lang-java prettyprint-override"><code>@XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "user") public class User implements Serializable { @XmlElement(name="id") private long userId; @XmlElement(name="firstName") private String firstName; @XmlElement(name="lastName") private String lastName; @XmlElement(name="email") private String email; public User() {} public User(long userId, String firstName, String lastName, String email) { this.userId = userId; this.firstName = firstName; this.lastName = lastName; this.email = email; } //And the getter/setters } </code></pre> <p>Then you can access the service at <strong><code>http://yourhost/service/users</code></strong> It will produce XML or JSON depending on what your client has for it's HTTP Accepts header. Pretty cool huh?</p>

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