Spring + Hibernate DAO injection fails in Netbeans - spring

Question

I have controller class LoginData.java
#Controller
#ManagedBean(name = "login")
#SessionScoped
public class LoginData implements Serializable{
#Autowired
private LoginDAO loginDao;
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public void validateUser(){
try{
loginDao.login(username, password);
}catch(BusinessException e){
}
}
}
I am trying to autowire this Dao and its implementation:
LoginDAO
public interface LoginDAO {
public boolean login(String username, String password)throws BusinessException;
public boolean register(String username, String password, UserType type)throws BusinessException;
}
LoginDAOImpl
public class LoginDAOImpl implements LoginDAO{
private String username;
private String password;
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
#Override
public boolean login(String username, String password) throws BusinessException{
Query query = sessionFactory.getCurrentSession().createQuery(
"SELECT u FROM User u WHERE u.username=:un");
query.setParameter("un", username);
if(query.list().size()==0)throw new BusinessException("No user in database!");
User user = (User)(query.list().get(0));
return getHashMD5(password).equals(user.getPassword());
}
#Override
public boolean register(String username, String password, UserType type) throws BusinessException{
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
public static String getHashMD5(String string) throws BusinessException{
try {
MessageDigest md = MessageDigest.getInstance("MD5");
BigInteger bi = new BigInteger(1, md.digest(string.getBytes()));
return bi.toString(16);
} catch (Exception ex) {
throw new BusinessException(ex.getMessage());
}
}
}
I am also trying to inject sessionFactory in DAO implementation, I don't know if this code will work. My xml for configuration:
dispatcher-servlet.xml
<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"/>
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="index.htm">indexController</prop>
</props>
</property>
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
<!--
The index controller.
-->
<bean name="indexController"
class="org.springframework.web.servlet.mvc.ParameterizableViewController"
p:viewName="index" />
<bean id="loginDAO" class="rs.ac.bg.etf.services.LoginDAOImpl"/>
web.xml
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>faces/index.xhtml</welcome-file>
</welcome-file-list>
I get null pointer exception when dao method is called in controller from JSF form. Anyone knows what could be the problem?
PS: xml files are mostly generated by Netbeans IDE.

Answer 1

You're missing the #Repository annotation for the autowiring to work.
Try this:
#Repository("LoginDAO")
public class LoginDAOImpl implements LoginDAO