Spring 4 и hibernate 4 экземпляр EntityManager имеет значение null

Question

Всякий раз, когда я пытаюсь использовать entitymanager, используя аннотацию @PersistenceContext, она равна нулю. я использую GlassFish Server 4.1: Я получаю эту Infos в журнале:

Infos: Building JPA container EntityManagerFactory for persistence unit  'webservice' 
Infos: HHH000204: Processing PersistenceUnitInfo [ 
name: webservice 
...] 

Мои ApplicationContext является следующее:

<tx:annotation-driven /> 
<context:annotation-config /> 

<!--EntityManager factory--> 

<bean id="emf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
    <property name="dataSource" ref="dataSource" /> 
    <property name="persistenceUnitName" value="webservice" /> 
    <property name="packagesToScan" value="org.project.domain" /> 
    <property name="jpaVendorAdapter"> 
     <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" /> 
    </property> 
    <property name="jpaProperties"> 
     <props>     
      <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop> 
     </props> 
    </property> 
</bean> 

<!--Datasource--> 

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
    <property name="driverClassName" value="org.postgresql.Driver" /> 
    <property name="url" value="jdbc:postgresql://localhost:5432/testdb" /> 
    <property name="username" value="postgres" /> 
    <property name="password" value="admin" /> 
</bean> 

<!--Transaction manager-->          
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
    <property name="entityManagerFactory" ref="emf" /> 
</bean> 

<!--Beans definition--> 
<bean id="persistenceExceptionTranslationPostProcessor" 
     class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor" /> 

<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/> 

Мой репозиторий класса заключается в следующем:

@Repository 
@Qualifier("studentRepository") 
public class StudentRepository implements IStudentRepository { 

@PersistenceContext(unitName ="webservice") 
private EntityManager em; 

public StudentRepository() { 
} 

@Transactional 
@Override 
public Student findByUsername(String username) { 
    System.out.println(em == null); 
    Query q = em.createNamedQuery("Student.findByUsername"); 
    q.setParameter("username", username); 
    try { 
     Student s = (Student) q.getSingleResult(); 
     System.out.println(s.toString()); 
     return (Student) q.getSingleResult(); 
    } catch (Exception e) { 
     return null; 
    } 
} 

Всякий раз, когда я пытаюсь:

System.out.println(em == null); 

Он возвращает true, а затем исключение Null pointer.

Я что-то упустил?

EDIT 1

Вот мой pom.xml:

<dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-core</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-context</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-beans</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-web</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-webmvc</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-jdbc</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-aop</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-tx</artifactId> 
     <version>4.2.0.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-context-support</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework</groupId> 
     <artifactId>spring-orm</artifactId> 
     <version>4.2.1.RELEASE</version> 
    </dependency> 
    <!-- <dependency> 
     <groupId>org.springframework.data</groupId> 
     <artifactId>spring-data-jpa</artifactId> 
     <version>1.9.1.RELEASE</version> 
    </dependency>--> 

    <!--======================================================================================================== 
               SPRING SECURITY DEPENDENCIES 
    ========================================================================================================--> 

    <dependency> 
     <groupId>org.springframework.security</groupId> 
     <artifactId>spring-security-config</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.security</groupId> 
     <artifactId>spring-security-web</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.security</groupId> 
     <artifactId>spring-security-core</artifactId> 
     <version>${spring.version}</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.security.oauth</groupId> 
     <artifactId>spring-security-oauth2</artifactId> 
     <version>2.0.7.RELEASE</version> 
    </dependency> 

    <!--======================================================================================================== 
               JERSEY DEPENDENCIES 
    ========================================================================================================--> 

    <dependency> 
     <groupId>javax.ws.rs</groupId> 
     <artifactId>javax.ws.rs-api</artifactId> 
     <version>2.0.1</version> 
    </dependency> 

    <dependency> 
     <groupId>com.sun.jersey.contribs</groupId> 
     <artifactId>jersey-multipart</artifactId> 
     <version>1.19</version> 
    </dependency> 
    <dependency> 
     <groupId>com.sun.jersey</groupId> 
     <artifactId>jersey-core</artifactId> 
     <version>1.19</version> 
    </dependency> 
    <dependency> 
     <groupId>com.sun.jersey</groupId> 
     <artifactId>jersey-bundle</artifactId> 
     <version>1.19</version> 
    </dependency> 

    <dependency> 
     <groupId>com.sun.jersey.contribs</groupId> 
     <artifactId>jersey-spring</artifactId> 
     <version>1.9.1</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> 
      <exclusion> 
       <groupId>org.springframework</groupId> 
       <artifactId>spring-aop</artifactId> 
      </exclusion> 
      <exclusion> 
       <groupId>org.springframework</groupId> 
       <artifactId>spring-asm</artifactId> 
      </exclusion> 
     </exclusions> 
    </dependency> 

    <!--======================================================================================================== 
             HIBERNATE DEPENDECIES 
    ========================================================================================================--> 

    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-entitymanager</artifactId> 
     <version>4.3.1.Final</version> 
    </dependency> 


    <dependency> 
     <groupId>org.hibernate</groupId> 
     <artifactId>hibernate-jpamodelgen</artifactId> 
     <version>4.3.1.Final</version> 
    </dependency> 

    <!--======================================================================================================== 
             OTHER DEPENDECIES 
    ========================================================================================================--> 
    <dependency> 
     <groupId>org.glassfish.web</groupId> 
     <artifactId>javax.servlet.jsp.jstl</artifactId> 
     <version>1.2.2</version> 
    </dependency> 
    <dependency> 
     <groupId>junit</groupId> 
     <artifactId>junit</artifactId> 
     <version>4.10</version> 
     <scope>test</scope> 
    </dependency> 

    <dependency> 
     <groupId>unknown.binary</groupId> 
     <artifactId>org-apache-commons-logging</artifactId> 
     <version>SNAPSHOT</version> 
    </dependency> 
    <dependency> 
     <groupId>unknown.binary</groupId> 
     <artifactId>cglib-2.2</artifactId> 
     <version>SNAPSHOT</version> 
    </dependency> 
    <dependency> 
     <groupId>javax</groupId> 
     <artifactId>javaee-web-api</artifactId> 
     <version>7.0</version> 
     <scope>provided</scope> 
    </dependency> 
    <dependency> 
     <groupId>mysql</groupId> 
     <artifactId>mysql-connector-java</artifactId> 
     <version>${mysql-connector-java.version}</version> 
     <scope>runtime</scope> 
    </dependency> 
    <dependency> 
     <groupId>org.postgresql</groupId> 
     <artifactId>postgresql</artifactId> 
     <version>9.4-1205-jdbc4</version> 
    </dependency> 

    <dependency> 
     <groupId>org.modelmapper</groupId> 
     <artifactId>modelmapper</artifactId> 
     <version>0.7.4</version> 
    </dependency> 
    <dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-annotations</artifactId> 
     <version>2.5.2</version> 
    </dependency> 
    <dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-core</artifactId> 
     <version>2.5.2</version> 
    </dependency> 
    <dependency> 
     <groupId>org.slf4j</groupId> 
     <artifactId>slf4j-api</artifactId> 
     <version>1.7.13</version> 
    </dependency> 
    <dependency> 
     <groupId>org.slf4j</groupId> 
     <artifactId>slf4j-log4j12</artifactId> 
     <version>1.7.13</version> 
    </dependency> 


</dependencies> 

Answer 1

Вы должны включить сканирование компонентов, а также в вашем ApplicationContext

<context:component-scan base-package="yourBasePackage"/>