Исходное исключение из нулевого указателя Spring

Question

У меня возникли проблемы с разработкой очень простого веб-приложения с использованием Spring-MVC (4.2.5), Spring-Security (4.0.3) и MongoDB.

Я пытаюсь реализовать собственный поставщик аутентификации для входа пользователя через базу данных с использованием шаблона DAO. Хотя он, похоже, правильно инициализировал контекст приложения, у меня есть исключение Null Pointer Exception для переменных Autwired (CustomerDao и CustomUserDetailsService).

web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" 
    id="WebApp_ID" version="3.1"> 
    <display-name>AcmeSpring</display-name> 
    <servlet> 
     <servlet-name>SpringController</servlet-name> 
     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
     <init-param> 
      <param-name>contextConfigLocation</param-name> 
      <param-value>/WEB-INF/spring-mvc.xml</param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
     <servlet-name>SpringController</servlet-name> 
     <url-pattern>/</url-pattern> 
    </servlet-mapping> 
    <listener> 
     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
    </listener> 
    <context-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value> 
      /WEB-INF/spring-security.xml 
     </param-value> 
    </context-param> 
    <filter> 
     <filter-name>springSecurityFilterChain</filter-name> 
     <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> 
    </filter> 
    <filter-mapping> 
     <filter-name>springSecurityFilterChain</filter-name> 
     <url-pattern>/*</url-pattern> 
    </filter-mapping> 
</web-app> 

пружинно-mvc.xml

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:mongo="http://www.springframework.org/schema/data/mongo" 
    xsi:schemaLocation="http://www.springframework.org/schema/mvc 
     http://www.springframework.org/schema/mvc/spring-mvc.xsd 
     http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context.xsd 
     http://www.springframework.org/schema/data/mongo 
     http://www.springframework.org/schema/data/mongo/spring-mongo-1.5.xsd"> 

    <mvc:annotation-driven /> 
    <context:component-scan base-package="controller" /> 
    <context:component-scan base-package="model" /> 
    <context:component-scan base-package="dao" /> 
    <context:component-scan base-package="service" /> 

    <mvc:resources mapping="/resources/**" location="/resources/" /> 

    <bean id="templateResolver" 
     class="org.thymeleaf.templateresolver.ServletContextTemplateResolver"> 
     <property name="prefix" value="/WEB-INF/html/" /> 
     <property name="suffix" value=".html" /> 
     <property name="templateMode" value="HTML5" /> 
    </bean> 

    <bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine"> 
     <property name="templateResolver" ref="templateResolver" /> 
    </bean> 

    <bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver"> 
     <property name="templateEngine" ref="templateEngine" /> 
     <property name="order" value="1" /> 
    </bean> 

    <mongo:db-factory id="mongoDbFactory" host="localhost" 
     port="27017" dbname="AcmeSpring" /> 

    <bean id="mongoTemplate" class="org.springframework.data.mongodb.core.MongoTemplate"> 
     <constructor-arg ref="mongoDbFactory" /> 
    </bean> 

    <bean id="customerDao" class="dao.CustomerDaoImpl"> 
    </bean> 
</beans> 

пружинно-security.xml

<beans:beans xmlns="http://www.springframework.org/schema/security" 
    xmlns:beans="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 
    http://www.springframework.org/schema/security 
    http://www.springframework.org/schema/security/spring-security-4.0.xsd"> 

    <http pattern="/resources/**" security="none" /> 

    <http auto-config="true"> 
     <intercept-url pattern="/user/**" access="hasRole('USER')" /> 
     <form-login authentication-failure-url="/login" login-page="/login" 
      login-processing-url="/login" default-target-url="/user" /> 
     <logout invalidate-session="true" success-handler-ref="logoutSuccessHandler" /> 
    </http> 

    <authentication-manager> 
     <authentication-provider ref="customAuthenticationProvider" /> 
    </authentication-manager> 

    <beans:bean id="customUserDetailsService" class="service.CustomUserDetailsService"> 
    </beans:bean> 

    <beans:bean id="customAuthenticationProvider" class="service.CustomAuthenticationProvider"> 
    </beans:bean> 

    <beans:bean id="logoutSuccessHandler" class="service.CustomLogoutSuccessHandler"> 
    </beans:bean> 
</beans:beans> 

CustomAuthenticationProvider

@Component 
public class CustomAuthenticationProvider implements AuthenticationProvider { 
    @Autowired 
    CustomUserDetailsService userDetails; 

    @Override 
    public Authentication authenticate(Authentication authentication) throws AuthenticationException { 
     String username = authentication.getName(); 
     String password = authentication.getCredentials().toString(); 

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

     Customer customer = userDetails.loadUserByUsername(username); 

     if(customer == null) { 
      throw new BadCredentialsException("Username errato"); 
     } 

     if(!password.equals(customer.getPassword())) { 
      throw new BadCredentialsException("Password errata"); 
     } 

     List<GrantedAuthority> authorities = new ArrayList<>(); 
     authorities.add(new SimpleGrantedAuthority(customer.getRole())); 

     return new UsernamePasswordAuthenticationToken(customer, password, authorities); 
    } 

    @Override 
    public boolean supports(Class<?> clazz) { 
     return clazz.equals(UsernamePasswordAuthenticationToken.class); 
    } 
} 

CustomUserDetailsService

@Service 
public class CustomUserDetailsService implements UserDetailsService { 
    @Autowired 
    private CustomerDao customerDao; 

    @Override 
    public Customer loadUserByUsername(String username) throws UsernameNotFoundException { 
     return customerDao.findCustomerByUsername(username); 
    } 
} 

CustomerDaoImpl

@Repository 
public class CustomerDaoImpl implements CustomerDao { 
    private static final String COLLECTION = "Customer"; 
    @Autowired 
    private MongoTemplate mongoTemplate; 

    @Override 
    public void create(Customer customer) { 
     this.mongoTemplate.insert(customer, COLLECTION); 
    } 

    @Override 
    public Customer findCustomerByUsername(String username) { 
     Query query = new Query(); 
     query.addCriteria(Criteria.where("username").is(username)); 
     System.out.println(query.toString()); 
     return this.mongoTemplate.findOne(query, Customer.class); 
    } 
} 

трассировки стека

java.lang.NullPointerException 
    service.CustomUserDetailsService.loadUserByUsername(CustomUserDetailsService.java:18) 
    service.CustomAuthenticationProvider.authenticate(CustomAuthenticationProvider.java:32) 
    org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:167) 
    org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:192) 
    org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:93) 
    org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:217) 
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120) 
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:120) 
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64) 
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53) 
    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91) 
    org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) 
    org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213) 
    org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176) 
    org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) 
    org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) 

Где я ошибаюсь? Спасибо заранее.

EDIT: Я не инициализировал автоматически измененную переменную вручную, только плохую пасту, я отредактировал свой код.

EDIT2: как это было предложено @iMysak я удалить боб декларацию CustomerDAO из весенне-mvc.xml и 3 услуги боба декларация от пружинного security.xml

новой трассировка стека

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.filterChains': Cannot resolve reference to bean 'org.springframework.security.web.DefaultSecurityFilterChain#1' while setting bean property 'sourceList' with key [1]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.web.DefaultSecurityFilterChain#1': Cannot create inner bean '(inner bean)#5adbfd3' of type [org.springframework.security.web.authentication.logout.LogoutFilter] while setting constructor argument with key [4]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#5adbfd3': Cannot resolve reference to bean 'logoutSuccessHandler' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'logoutSuccessHandler' is defined 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:382) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:157) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1481) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1226) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:753) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398) 
    at java.util.concurrent.FutureTask.run(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.web.DefaultSecurityFilterChain#1': Cannot create inner bean '(inner bean)#5adbfd3' of type [org.springframework.security.web.authentication.logout.LogoutFilter] while setting constructor argument with key [4]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#5adbfd3': Cannot resolve reference to bean 'logoutSuccessHandler' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'logoutSuccessHandler' is defined 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:313) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:129) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:382) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:157) 
    at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:634) 
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:140) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351) 
    ... 26 more 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#5adbfd3': Cannot resolve reference to bean 'logoutSuccessHandler' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'logoutSuccessHandler' is defined 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:359) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108) 
    at org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments(ConstructorResolver.java:634) 
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:140) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:299) 
    ... 40 more 
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'logoutSuccessHandler' is defined 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:698) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1175) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:284) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) 
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:351) 
    ... 48 more 

Я также попытался добавить зависимости aop, tx и выражений, как предложено here, но я получаю следующую трассировку стека

Answer 1

Это может быть проблема с использованием нескольких context:component-scan теги. Пожалуйста, попробуйте еще:

<context:component-scan base-package="controller model dao service" /> 

вместо декларации отдельно.

Answer 2

Вы сделали классическую ошибку весны.Вы аннотированный боб:

@Autowired 
CustomUserDetailsService userDetails; 

Вы под названием новый:

userDetails = new CustomUserDetailsService(); 

Это либо под контролем Spring или ваш. В тот момент, когда вы назвали новое, это было из рук Весны.

Если вы хотите, чтобы пружина зависала автоматически, вы не можете вызвать new для инициализации ссылки. Пусть весна это сделает.

Answer 3

Вы можете попробовать избавиться от

<beans:bean id="customAuthenticationProvider" class="service.CustomAuthenticationProvider"> 
</beans:bean> 

и

<beans:bean id="customUserDetailsService" class="service.CustomUserDetailsService"> 
    </beans:bean> 

Я думаю, что декларация XML может быть избыточными с аннотацией декларации и компонент сканирования

Answer 4

Когда вы объявляли @Autowired класс перкутанции

Например, @Autowired CustomerDao customerDao;

1. Имя поля должно совпадать с объявленным именем bean в файле xml.
2. Вам необходимо реализовать метод сеттера, поскольку автоустановка выполняется в три этапа инжекции конструктора, инъекции метода установки и инъекции интерфейса.
3. Так что, если вы не создаете сеттер метод будет бросать NullPointerException при использовании autowired объекта:

public void setCustomerDao(CustomerDao customerDao) { 
    this.customerDao= customerDao; 
}