如何在jersey REST实现中获取纯JSON数据？

@Path("/example")
public class ExampleResource {
    // ...
}

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getJsonData() {
    // ...
}

@XmlRootElement
public class ExampleData {
    private String name;
    private int age;
    
    // getters and setters
}

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getJsonData() {
    ExampleData data = new ExampleData();
    data.setName("John");
    data.setAge(25);
    
    // ...
}

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response getJsonData() {
    ExampleData data = new ExampleData();
    data.setName("John");
    data.setAge(25);
    
    return Response.ok(data).build();
}