Jersey to create Restful webservice

<?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_2_5.xsd"
	id="WebApp_ID" version="2.5">

	<display-name>restful</display-name>

	<!-- spring Configuration -->
	<!-- <listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath*:applicationContext.xml</param-value>
	</context-param> -->

    <!-- Jersey Configuration -->
	<servlet>
		<servlet-name>Jersey Web Application</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.boonya.restful.jersey</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>Jersey Web Application</servlet-name>
		<url-pattern>/services/*</url-pattern>
	</servlet-mapping>


	<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>
</web-app>

package com.boonya.restful.jersey;
import javax.annotation.Resource;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path(value = "/userservice")
public class UserService {
	
	@Resource(name="user")
	User user;
	

	@GET
	@Produces(MediaType.TEXT_PLAIN)
	public String sayHello() {
		return "Hello Jersey";
	}

	@GET
	@Produces(MediaType.TEXT_PLAIN)
	@Path("user/login/{username}/{password}")
	public String getUserEmail(@PathParam("username")String userName,@PathParam("password") String password) {
		if (userName.equals("boonya") && password.equals("123456")) {
			return "Hello boonya,you logined success! Your email is [email protected]";
		}
		return "Sorry,we didn't find this user's Account!";
	}
	
	@GET
	@Produces(MediaType.APPLICATION_XML)
	@Path("user/info/xml")
	public User  getUserInfoByxml(){
		User user=new User();
		user.setId(10000);
		user.setUserName("boonya");
		user.setPassword("asdfg");
		user.setEmail("[email protected]");
		return user;
	}
	
	@GET
	@Produces(MediaType.APPLICATION_JSON)
	@Path("user/info/json")
	public User  getUserInfoByjson(){
		User user=new User();
		user.setId(10000);
		user.setUserName("boonya");
		user.setPassword("asdfg");
		user.setEmail("[email protected]");
		return user;
	}
	
	@POST
	@Produces(MediaType.TEXT_HTML)
	@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
	@Path("user/add")
	public void addUser(@FormParam("username")String userName,@FormParam("password") String password){
		user.setId(10001);
		user.setUserName(userName);
		user.setPassword(password);
		System.out.println(user!=null);
	}
	
	@PUT
	@Produces(MediaType.TEXT_HTML)
	@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
	@Path("user/update/{id}")
	public void updateUser(@PathParam("id") int id,@PathParam("email")String email){
		if(id==user.getId()){
			user.setEmail(email);
			System.out.println("Update user success! "+user.getEmail());
		}
	}
	
	@DELETE
	@Produces(MediaType.TEXT_HTML)
	@Consumes(MediaType.APPLICATION_FORM_URLENCODED)
	@Path("user/delete/{id}")
	public void addUser(@PathParam("id") int id){
		if(id==user.getId()){
			user=null;
			System.out.println("Delete user success!");
		}
	}

}

package com.boonya.restful.jersey;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.core.header.MediaTypes;
import com.sun.jersey.test.framework.JerseyTest;
/**
 *           TOMCAT        
 */
public class ClientTest extends JerseyTest {
	
    public ClientTest()throws Exception {
        super("com.sun.jersey.samples.services.userservice.resources");
    }

    /**
     *     JSON       
     */
    public void getUserInfoByJson() {
        WebResource webResource =super.client().resource("http://localhost:8080/restful/services/userservice/user/info/json");
        String responseMsg = webResource.get(String.class);
        System.out.println(responseMsg);
    }
    
    /**
     *     XML       
     */
    public void getUserInfoByXml() {
        WebResource webResource =super.client().resource("http://localhost:8080/restful/services/userservice/user/info/xml");
        String responseMsg = webResource.get(String.class);
        System.out.println(responseMsg);
    }

    /**
     * Test if a WADL document is available at the relative path
     * "application.wadl".
     */
    public void testApplicationWadl() {
        WebResource webResource = resource();
        String serviceWadl = webResource.path("application.wadl").accept(MediaTypes.WADL).get(String.class);
        System.out.println(serviceWadl.length() > 0);
    }
    
    public static void main(String[] args) throws Exception {
    	ClientTest test=new ClientTest(); 
    	System.out.println("-------Json----");
    	test.getUserInfoByJson();
    	System.out.println("-------Xml----");
    	test.getUserInfoByXml();
	}
}