REST WS с интерфейсом

Question

Я пытаюсь реализовать REST WS. Следующий код работает нормально:

@Path("/MyRest") 
@WebService 
public class MyService { 
    @GET 
    @Produces(MediaType.APPLICATION_JSON) 
    @Path("/{id}") 
    public Response test(@PathParam("id") String id) { 
     String str = "{\"status\":\"ok\",\"id\":\"" + id + "\"}"; 
     return Response.status(200).entity(str).build(); 
    } 
} 

web.xml:

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> 
    <display-name>WSRest</display-name> 
<servlet> 
    <servlet-name>Jersey REST Service</servlet-name> 
<servlet-class> 
    com.sun.jersey.spi.container.servlet.ServletContainer 
</servlet-class> 
    <init-param> 
    <param-name>com.sun.jersey.config.property.packages</param-name> 
    <param-value>test</param-value> 
    </init-param> 
    <load-on-startup>1</load-on-startup> 
</servlet> 
<servlet-mapping> 
    <servlet-name>Jersey REST Service</servlet-name> 
    <url-pattern>/rest/*</url-pattern> 
</servlet-mapping> 
</web-app> 

Теперь я пытаюсь сделать это с помощью интерфейса. Интерфейс будет как следует, я думаю:

@Path("/MyRest") 
@WebService 
public interface IService { 
    @GET 
    @Produces(MediaType.APPLICATION_JSON) 
    @Path("/{id}") 
    public Response test(@PathParam("id") String id); 
} 

А теперь реализация WS будет так, правильно ?:

public class MyService implements IService{ 
@Override 
public Response test(@PathParam("id") String id) { 
    String str = "{\"status\":\"ok\",\"id\":\"" + id + "\"}"; 
    return Response.status(200).entity(str).build(); 
} 
} 

Я получаю «HTTP Status 500 - Servlet.init() for servlet Jersey REST Service threw exception», когда я пытаюсь «бежать "это снова:/ Любые идеи? Заранее спасибо.

Полное исключение:

type Exception report 

message Servlet.init() for servlet Jersey REST Service threw exception 

description The server encountered an internal error that prevented it from fulfilling this request. 

exception 

javax.servlet.ServletException: Servlet.init() for servlet Jersey REST Service threw exception 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2430) 
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2419) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    java.lang.Thread.run(Thread.java:722) 
root cause 

com.sun.jersey.spi.inject.Errors$ErrorMessagesException 
    com.sun.jersey.spi.inject.Errors.processErrorMessages(Errors.java:170) 
    com.sun.jersey.spi.inject.Errors.postProcess(Errors.java:136) 
    com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:199) 
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:795) 
    com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:790) 
    com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:491) 
    com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:321) 
    com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:605) 
    com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:207) 
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:376) 
    com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:559) 
    javax.servlet.GenericServlet.init(GenericServlet.java:160) 
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) 
    org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) 
    org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) 
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2430) 
    org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2419) 
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    java.lang.Thread.run(Thread.java:722) 

Answer 1

Пример веб-метода с использованием интерфейса: реализации сервиса

Web:

@Path("/WS") 
@WebService 
public class WebService implements IWebService { 

@Override 
@POST 
@Consumes("application/json") 
@Produces("application/json") 
@Path("/Login") 
public Response Login(JSONObject data) { 
    //stuff here 
} 
} 

Интерфейс:

public interface IWebService { 

@POST 
@Consumes("application/json") 
@Produces("application/json") 
@Path("/Login") 
public Response Login(JSONObject data); 

}