WebServices Calculatrice Exemple à l'aide de Java

J'ai créé un exemple d'application de la calculatrice pour la somme de deux nombres à l'aide de services web en Java en utilisant Maillot de service.

Mon code est :
Calculator.java

package p1;
import javax.jws.WebService;
import javax.jws.WebMethod;
import javax.ws.rs.Path;

@WebService
@Path("/CalculatorService")
public class Calculator
{
    @WebMethod
    public String sum(int x,int y)
    {
        return ""+(x+y);
    }
}

Calculator.java:

package mypack;

import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
import javax.xml.ws.RequestWrapper;
import javax.xml.ws.ResponseWrapper;


/**
 * This class was generated by the JAXWS SI.
 * JAX-WS RI 2.0_02-b08-fcs
 * Generated source version: 2.0
 * 
 */
@WebService(name = "Calculator", targetNamespace = "http://p1/")
public interface Calculator {


    /**
     * 
     * @param arg1
     * @param arg0
     * @return
     *     returns java.lang.String
     */
    @WebMethod
    @WebResult(targetNamespace = "")
    @RequestWrapper(localName = "sum", targetNamespace = "http://p1/", className = "mypack.Sum")
    @ResponseWrapper(localName = "sumResponse", targetNamespace = "http://p1/", className = "mypack.SumResponse")
    public String sum(
        @WebParam(name = "arg0", targetNamespace = "")
        int arg0,
        @WebParam(name = "arg1", targetNamespace = "")
        int arg1);

}

CalculatorService.java:

package mypack;

import java.net.MalformedURLException;
import java.net.URL;
import javax.xml.namespace.QName;
import javax.xml.ws.Service;
import javax.xml.ws.WebEndpoint;
import javax.xml.ws.WebServiceClient;


/**
 * This class was generated by the JAXWS SI.
 * JAX-WS RI 2.0_02-b08-fcs
 * Generated source version: 2.0
 * 
 */
@WebServiceClient(name = "CalculatorService", targetNamespace = "http://p1/", wsdlLocation = "http://localhost:8081/MyCalculatorWs/CalculatorService?WSDL")
public class CalculatorService
    extends Service
{

    private final static URL CALCULATORSERVICE_WSDL_LOCATION;

    static {
        URL url = null;
        try {
            url = new URL("http://localhost:8081/MyCalculatorWs/CalculatorService?WSDL");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        CALCULATORSERVICE_WSDL_LOCATION = url;
    }

    public CalculatorService(URL wsdlLocation, QName serviceName) {
        super(wsdlLocation, serviceName);
    }

    public CalculatorService() {
        super(CALCULATORSERVICE_WSDL_LOCATION, new QName("http://p1/", "CalculatorService"));
    }

    /**
     * 
     * @return
     *     returns Calculator
     */
    @WebEndpoint(name = "CalculatorPort")
    public Calculator getCalculatorPort() {
        return (Calculator)super.getPort(new QName("http://p1/", "CalculatorPort"), Calculator.class);
    }

}

ObjectFactory.java:

package mypack;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.XmlElementDecl;
import javax.xml.bind.annotation.XmlRegistry;
import javax.xml.namespace.QName;
/**
* This object contains factory methods for each 
* Java content interface and Java element interface 
* generated in the mypack package. 
* <p>An ObjectFactory allows you to programatically 
* construct new instances of the Java representation 
* for XML content. The Java representation of XML 
* content can consist of schema derived interfaces 
* and classes representing the binding of schema 
* type definitions, element declarations and model 
* groups.  Factory methods for each of these are 
* provided in this class.
* 
*/
@XmlRegistry
public class ObjectFactory {
private final static QName _Sum_QNAME = new QName("http://p1/", "sum");
private final static QName _SumResponse_QNAME = new QName("http://p1/", "sumResponse");
/**
* Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: mypack
* 
*/
public ObjectFactory() {
}
/**
* Create an instance of {@link Sum }
* 
*/
public Sum createSum() {
return new Sum();
}
/**
* Create an instance of {@link SumResponse }
* 
*/
public SumResponse createSumResponse() {
return new SumResponse();
}
/**
* Create an instance of {@link JAXBElement }{@code <}{@link Sum }{@code >}}
* 
*/
@XmlElementDecl(namespace = "http://p1/", name = "sum")
public JAXBElement<Sum> createSum(Sum value) {
return new JAXBElement<Sum>(_Sum_QNAME, Sum.class, null, value);
}
/**
* Create an instance of {@link JAXBElement }{@code <}{@link SumResponse }{@code >}}
* 
*/
@XmlElementDecl(namespace = "http://p1/", name = "sumResponse")
public JAXBElement<SumResponse> createSumResponse(SumResponse value) {
return new JAXBElement<SumResponse>(_SumResponse_QNAME, SumResponse.class, null, value);
}
}

package-info.java:

@javax.xml.bind.annotation.XmlSchema(namespace = "http://p1/")
package mypack;

Sum.java:

package mypack;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlType;
/**
* <p>Java class for sum complex type.
* 
* <p>The following schema fragment specifies the expected content contained within this class.
* 
* <pre>
* &lt;complexType name="sum">
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;sequence>
*         &lt;element name="arg0" type="{http://www.w3.org/2001/XMLSchema}int"/>
*         &lt;element name="arg1" type="{http://www.w3.org/2001/XMLSchema}int"/>
*       &lt;/sequence>
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
* 
* 
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "sum", propOrder = {
"arg0",
"arg1"
})
public class Sum {
protected int arg0;
protected int arg1;
/**
* Gets the value of the arg0 property.
* 
*/
public int getArg0() {
return arg0;
}
/**
* Sets the value of the arg0 property.
* 
*/
public void setArg0(int value) {
this.arg0 = value;
}
/**
* Gets the value of the arg1 property.
* 
*/
public int getArg1() {
return arg1;
}
/**
* Sets the value of the arg1 property.
* 
*/
public void setArg1(int value) {
this.arg1 = value;
}
}

SumResponse.java:

package mypack;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
/**
* <p>Java class for sumResponse complex type.
* 
* <p>The following schema fragment specifies the expected content contained within this class.
* 
* <pre>
* &lt;complexType name="sumResponse">
*   &lt;complexContent>
*     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
*       &lt;sequence>
*         &lt;element name="return" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
*       &lt;/sequence>
*     &lt;/restriction>
*   &lt;/complexContent>
* &lt;/complexType>
* </pre>
* 
* 
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "sumResponse", propOrder = {
"_return"
})
public class SumResponse {
@XmlElement(name = "return")
protected String _return;
/**
* Gets the value of the return property.
* 
* @return
*     possible object is
*     {@link String }
*     
*/
public String getReturn() {
return _return;
}
/**
* Sets the value of the return property.
* 
* @param value
*     allowed object is
*     {@link String }
*     
*/
public void setReturn(String value) {
this._return = value;
}
}

Et mon web.xml fichier:

<?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>CalculatorEx</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<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>com.restful.demo.resources</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>

Je suis de l'exécution de ma demande d'aide:
http://localhost:8080/CalculatorEx/rest/CalculatorService

j'obtiens l'erreur comme ceci:

exception:
javax.servlet.ServletException: Servlet.init() for servlet Jersey REST Service threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
java.lang.Thread.run(Thread.java:679)
root cause:
com.sun.jersey.api.container.ContainerException: The ResourceConfig instance does not contain any root resource classes.
com.sun.jersey.server.impl.application.RootResourceUriRules.<init>(RootResourceUriRules.java:99)
com.sun.jersey.server.impl.application.WebApplicationImpl._initiate(WebApplicationImpl.java:1298)
com.sun.jersey.server.impl.application.WebApplicationImpl.access$700(WebApplicationImpl.java:169)
com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:775)
com.sun.jersey.server.impl.application.WebApplicationImpl$13.f(WebApplicationImpl.java:771)
com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:771)
com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:766)
com.sun.jersey.spi.container.servlet.ServletContainer.initiate(ServletContainer.java:488)
com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:318)
com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:609)
com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:210)
com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:373)
com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:556)
javax.servlet.GenericServlet.init(GenericServlet.java:160)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
java.lang.Thread.run(Thread.java:679)