spring - 手动获取 AuthenticationManager 实例

Question

我正在尝试实现以下内容，但我的authenticationManager实例抛出以下异常并且未 Autowiring 。如何从 Spring 手动获取它的实例？我没有使用 Spring Controller ，而是使用 JSF 请求作用域 bean。当容器尝试 Autowiring authenticationManager 时，我在运行时收到以下异常。 requestCache 来得很好。我不明白为什么我有两个实例......

配置:

<authentication-manager>
        <authentication-provider user-service-ref="userManager">
                <password-encoder ref="passwordEncoder" />
        </authentication-provider>
    </authentication-manager>

Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: protected org.springframework.security.authentication.AuthenticationManager com.dc.web.actions.SignUpDetail.authenticationManager; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [org.springframework.security.authentication.AuthenticationManager] is defined: expected single matching bean but found 2: [org.springframework.security.authentication.ProviderManager#0, org.springframework.security.authenticationManager] javax.faces.webapp.FacesServlet.service(FacesServlet.java:325)

@Controller
public class SignupController
{

    @Autowired
    RequestCache requestCache;

    @Autowired
    protected AuthenticationManager authenticationManager;

    @RequestMapping(value = "/account/signup/", method = RequestMethod.POST)
    public String createNewUser(@ModelAttribute("user") User user, BindingResult result,  HttpServletRequest request, HttpServletResponse response)
    {
        //After successfully Creating user
            authenticateUserAndSetSession(user, request);

        return "redirect:/home/";
    }

    private void authenticateUserAndSetSession(User user,
        HttpServletRequest request)
    {
        UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(
                user.getUsername(), user.getPassword());

        // generate session if one doesn't exist
        request.getSession();

        token.setDetails(new WebAuthenticationDetails(request));
        Authentication authenticatedUser = authenticationManager.authenticate(token);

        SecurityContextHolder.getContext().setAuthentication(authenticatedUser);
    }

}

Answer 1

首先，为您的 AuthenticationManager 提供明确的 bean 名称

<authentication-manager alias="authenticationManager">
   ...
</authentication-manager>

其次， Autowiring 时使用限定符:

@Autowired
@Qualifier("authenticationManager")
protected AuthenticationManager authenticationManager;