java.lang.NullPointerException in My Spring Service with Rest Jax rs How do fix it?

my userService is null how do to fixe ? tnks ;)

 java.lang.NullPointerException
    at com.what.now.rest.RestCreateUser.cretaeAccount(RestCreateUser.java:52)

REST Service

service for browser

package com.what.now.rest;

import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.what.now.business.IUserBusiness;
import com.what.now.model.bean.User;
import com.what.now.model.dto.AccountRegisterDTO;
import com.what.now.tools.ConverterUserBeanDTO;
import com.what.now.tools.ValidateRestInput;

/**
 * Rest Service
 *
 */
@Component
@Path("/register")
public class RestCreateUser {
    @Autowired
    private IUserBusiness userService;
    @POST
    @Path("/createAccount")
    @Produces({ MediaType.APPLICATION_JSON, })
    @Consumes({ MediaType.APPLICATION_JSON, MediaType.APPLICATION_XHTML_XML })
    public Boolean cretaeAccount(final AccountRegisterDTO newAccount) {
        Boolean result = false;
            // create user
            User user = ConverterUserBeanDTO.userDtoToBean(newAccount);
            // add dto in bean
            // save user
            userService.create(user);
            // result to save
            if (user.getId() != 0) {
                result = true;
            }
        return result;   
}

Service

service to add in data base

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.what.now.business.IUserBusiness;
import com.what.now.dao.IUserDAO;
import com.what.now.model.bean.User;

@Service
public class UserBusinessImpl implements IUserBusiness {
    @Autowired
    IUserDAO userDAO;

    public void create(User user) {
         userDAO.create(user);
    }

    public User find(String id) {
        return userDAO.find(id);
    }

    public void update(User user) {
        userDAO.update(user);

    }

    public void delete(User user) {
        userDAO.delete(user);

    }

}

web.xml

conf for web app .. this conf to load spring context and init Jersey servlet

<web-app xmlns="http://ift.tt/nSRXKP" xmlns:xsi="http://ift.tt/ra1lAU"
            xsi:schemaLocation="http://ift.tt/nSRXKP 
                  http://ift.tt/1eWqHMP"
            version="3.0">
// context application 
            <context-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath*:*/applicationContext.xml </param-value>
            </context-param>
                        <listener>
                <listener-class>
        org.springframework.web.context.ContextLoaderListener
                </listener-class>
            </listener>
            <servlet>
                <servlet-name>whatNow-rest-serlvet</servlet-name>
                <servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
                <init-param>
                    <param-name>com.sun.jersey.config.property.packages</param-name>
                    <param-value>com.what.now.rest</param-value>
                </init-param>
                <init-param>
                    <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
                    <param-value>true</param-value>
                </init-param>
                <load-on-startup>1</load-on-startup>
            </servlet>
            <servlet-mapping>
                <servlet-name>whatNow-rest-serlvet</servlet-name>
                <url-pattern>/rest/*</url-pattern>
            </servlet-mapping>
        </web-app>

applicationContext.xml

this my application configuration

  <context:component-scan base-package="com.what.now.*"
    annotation-config="true" />

  <tx:annotation-driven/>

</beans>

pom.xml

   <?xml version="1.0"?>
        <project xsi:schemaLocation="http://ift.tt/IH78KX http://ift.tt/VE5zRx" xmlns="http://ift.tt/IH78KX"
            xmlns:xsi="http://ift.tt/ra1lAU">      
          <modelVersion>4.0.0</modelVersion>       
           <groupId>com.what.now.project</groupId>
            <version>0.0.1-SNAPSHOT</version>
           <artifactId>whatNow-packaging</artifactId>
          <packaging>war</packaging>
          <url>http://ift.tt/19pvvEY;
          <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
             <jdk.version>1.8</jdk.version>
              <spring.version>3.2.13.RELEASE</spring.version>
              <jersey.version>1.17.1</jersey.version>
                <jersey.client.version>1.17.1</jersey.client.version>
                <jersey.servlet.version>1.17.1</jersey.servlet.version>
                <jersey.json.version>1.17.1</jersey.json.version>
                <jersey.multipart>1.17.1</jersey.multipart>
                <javax.mail>1.4</javax.mail>
            <maven.compiler.target>1.8</maven.compiler.target>
            <maven.compiler.source>1.8</maven.compiler.source>
          </properties>
           <dependencies>
            <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>3.8.1</version>
              <scope>test</scope>        
            </dependency>
             <!-- Spring  -->
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-core</artifactId>
                    <version>${spring.version}</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-context</artifactId>
                    <version>${spring.version}</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-orm</artifactId>
                    <version>${spring.version}</version>
                </dependency>
                <dependency>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-web</artifactId>
                    <version>${spring.version}</version>
                </dependency>
             <!-- Jersey   -->
            <dependency>
                    <groupId>com.sun.jersey</groupId>
                    <artifactId>jersey-json</artifactId>
                    <version>${jersey.json.version}</version>
            </dependency>       
            <dependency>
                     <groupId>com.sun.jersey</groupId>
                     <artifactId>jersey-servlet</artifactId>
                     <version>${jersey.servlet.version}</version>
            </dependency>
                 <!-- Spring + Jersey  -->
            <dependency>
                <groupId>com.sun.jersey.contribs</groupId>
                <artifactId>jersey-spring</artifactId>
                <version>${jersey.version}</version>
                <exclusions>
                        <exclusion>
                            <groupId>org.springframework</groupId>
                            <artifactId>spring</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>org.springframework</groupId>
                            <artifactId>spring-core</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>org.springframework</groupId>
                            <artifactId>spring-web</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>org.springframework</groupId>
                            <artifactId>spring-beans</artifactId>
                        </exclusion>
                        <exclusion>
                            <groupId>org.springframework</groupId>
                            <artifactId>spring-context</artifactId>
                        </exclusion>
                    </exclusions>
            </dependency>
             <!-- hibernate  -->
</dependencies>
          </build>
        </project>