我正在使用Spring Security 3.2和Spring 4.0.1我正在將xml配置轉換為Java配置。當我在“過濾器”中添加注釋AuthenticationManager時@Autowired，出現異常Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.security.authentication.AuthenticationManager] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}我已經嘗試了注入，AuthenticationManagerFactoryBean但是由于類似的異常也失敗了。這是我正在使用的XML配置<?xml version="1.0" encoding="UTF-8"?> <beans ...>    <security:authentication-manager id="authenticationManager">        <security:authentication-provider user-service-ref="userDao">            <security:password-encoder ref="passwordEncoder"/>        </security:authentication-provider>    </security:authentication-manager>    <security:http            realm="Protected API"            use-expressions="true"            auto-config="false"            create-session="stateless"            entry-point-ref="unauthorizedEntryPoint"            authentication-manager-ref="authenticationManager">        <security:access-denied-handler ref="accessDeniedHandler"/>        <security:custom-filter ref="tokenAuthenticationProcessingFilter" position="FORM_LOGIN_FILTER"/>        <security:custom-filter ref="tokenFilter" position="REMEMBER_ME_FILTER"/>        <security:intercept-url method="GET" pattern="/rest/news/**" access="hasRole('user')"/>        <security:intercept-url method="PUT" pattern="/rest/news/**" access="hasRole('admin')"/>        <security:intercept-url method="POST" pattern="/rest/news/**" access="hasRole('admin')"/>        <security:intercept-url method="DELETE" pattern="/rest/news/**" access="hasRole('admin')"/>    </security:http>