在几个博客文章和SO问题中相对较好地讨论了这个问题。但是，我找不到专门解决Java配置问题的解决方案。我怀疑我的java配置文件中做错了什么，因为我发现了一些帖子，指出可以通过删除调试XML标记来解决该问题（https://jira.springsource.org/browse/
SEC-1885）。

我正在使用spring安全性的3.2.0.RELEASE和spring框架的3.2.6.RELEASE。在spring安全性/
mvc配置和自定义AuthenticationProvider中使用的主要文件下面。

WebConfig：

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"com.mypackage"})
@ImportResource( { "classpath:/spring-data.xml", "classpath:/trace-context.xml" })
@EnableTransactionManagement  
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/login").setViewName("login");
    }

    @Bean
    public StandardServletMultipartResolver multipartResolver() {
        return new StandardServletMultipartResolver();
    }

    @Bean(destroyMethod = "shutdown")
    public GraphDatabaseService graphDatabaseService() {
        return new GraphDatabaseFactory().newEmbeddedDatabase("target/temp.db");
    }

    @Bean
    public RepositoryInitializer repositoryInitializer() {
        return new RepositoryInitializer();
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        LocaleChangeInterceptor localeChangeInterceptor = new         LocaleChangeInterceptor();
        localeChangeInterceptor.setParamName("lang");
        registry.addInterceptor(localeChangeInterceptor);
    }

    @Bean
    public LocaleResolver localeResolver() {
        CookieLocaleResolver cookieLocaleResolver = new CookieLocaleResolver();
        cookieLocaleResolver.setDefaultLocale(StringUtils.parseLocaleString("en"));
        return cookieLocaleResolver;
    }

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }

    @Bean
    public MessageSource messageSource() {
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        messageSource.setBasenames("classpath:messages/messages", "classpath:messages/validation");
        // if true, the key of the message will be displayed if the key is not
        // found, instead of throwing a NoSuchMessageException
        messageSource.setUseCodeAsDefaultMessage(true);
        messageSource.setDefaultEncoding("UTF-8");
        // # -1 : never reload, 0 always reload
        messageSource.setCacheSeconds(0);
        return messageSource;
    }
}

WebInitializer：

public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[] { WebSecurityConfig.class };
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class<?>[] { WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[] { "/" };
    }

    @Override
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setEncoding("UTF-8");
        return new Filter[] { characterEncodingFilter, new SiteMeshFilter()};
    }

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        super.onStartup(servletContext);
        //servletContext.addListener(new HttpSessionEventPublisher());
    }
}

WebSecurityConfig：

@Configuration
@EnableWebSecurity
@Order(1)
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests().anyRequest().permitAll();
        //  .antMatchers("/", "/login").permitAll()
        //  .anyRequest().authenticated();
        http
            .formLogin()
                .defaultSuccessUrl("/hello")
                .loginPage("/login")
                .permitAll()
                .and()
            .logout()
                .logoutUrl("/logout")
                .permitAll();
        http    
            .sessionManagement()
            .maximumSessions(1)
            .maxSessionsPreventsLogin(true);

    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web
            .ignoring()
            .antMatchers("/resources/**");
    }

    @Override
    protected void configure(AuthenticationManagerBuilder authManagerBuilder) throws Exception {
        authManagerBuilder.authenticationProvider(new ApplicationAuthenticationProvider());
    }
}

WebSecurityInitializer：

public class WebSecurityInitializer extends AbstractSecurityWebApplicationInitializer {

}

AuthenticationProvider：

@Component(value = "authenticationProvider")
public class ApplicationAuthenticationProvider implements AuthenticationProvider {

    @Autowired
    public UserService userService;

    public ApplicationAuthenticationProvider() {}

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

        User user = userService.loadUserByUsername(username);

        if (user == null) {
            throw new BadCredentialsException("Username not found.");
        }

        if (!password.equals(user.getPassword())) {
            throw new BadCredentialsException("Wrong password.");
        }

        Collection<? extends GrantedAuthority> authorities = user.getAuthorities();

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

    @Override
    public boolean supports(Class<?> arg0) {
        return true;
    }
}

UserService：

@Service
public class UserService implements UserDetailsService {

    @Autowired
    private UserRepository userRepository;


    @Override
    public User loadUserByUsername(String username) throws UsernameNotFoundException {
        return userRepository.findByUsername(username);
    }
}

Spring在构建其应用程序上下文时（在应用程序初始化期间）抛出异常：

[ERROR] [main 11:53:37] (FrameworkServlet.java:initServletBean:467) Context     initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name         'authenticationProvider': Injection of autowired dependencies failed; nested exception is     org.springframework.beans.factory.BeanCreationException: Could not autowire field: public     com.evidencefactory.service.UserService     com.evidencefactory.security.ApplicationAuthenticationProvider.userService; nested     exception is java.lang.IllegalArgumentException: Can not set     com.evidencefactory.service.UserService field     com.evidencefactory.security.ApplicationAuthenticationProvider.userService to     sun.proxy.$Proxy71

我不明白为什么会这样，但是如果我UserDetailsService从UserService类中删除接口实现，那么应用程序将成功启动。但是，当ApplicationAuthenticationProviderSpring调用时，UserService不会自动绑定到其中，并且应用程序将引发NullPointerException。

java.lang.NullPointerException
at com.evidencefactory.security.ApplicationAuthenticationProvider.authenticate(ApplicationAuthenticationProvider.java:33)