编辑：我刚刚意识到问题不是来自 spring-security 无法实例化 spring-security.xml 文件中引用的 userDetailsServiceImpl，而是 addUserFormController 无法实例化，因为它无法自动装配 UserDetailsServiceImpl。所以问题来自这样一个事实，无论出于何种原因，这个 Controller 都无法访问这个 Service bean UserDetailsServiceImpl。我认为我确实正确地进行了组件扫描，仅扫描 mvc-dispatcher-servlet.xml 中的控制器，以及除 applicationContext 中的控制器之外的所有其他控制器。
我正在使用 Spring MVC 和 Hibernate，并且正在尝试将 Spring Security 与自定义 UserDetailsService 和 Assembler 集成。
看起来我的 Spring Security 无法访问应该由 applicationContext.xml 扫描的 bean。
加载我的应用程序时，我遇到了以下错误：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'addUserFormController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void com.controller.AddUserFormController.setUserDetailsService(com.service.UserDetailsServiceImpl); nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.service.UserDetailsServiceImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
这是我的spring-security.xml：
<?xml version="1.0" encoding="UTF-8"?>
<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"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security-3.1.xsd">
<http auto-config='true' use-expressions='true'>
<intercept-url pattern="/login*" access="isAnonymous()" />
<intercept-url pattern="/secure/**" access="hasRole('ROLE_Admin')" />
<logout logout-success-url="/listing.htm" />
<form-login login-page="/login.htm" login-processing-url="/j_spring_security_check"
authentication-failure-url="/login_error.htm" default-target-url="/listing.htm"
always-use-default-target="true" />
</http>
<beans:bean id="com.daoAuthenticationProvider"
class="org.springframework.security.authentication.dao.DaoAuthenticationProvider">
<beans:property name="userDetailsService" ref="userDetailsService" />
</beans:bean>
<beans:bean id="authenticationManager"
class="org.springframework.security.authentication.ProviderManager">
<beans:property name="providers">
<beans:list>
<beans:ref local="com.daoAuthenticationProvider" />
</beans:list>
</beans:property>
</beans:bean>
<authentication-manager>
<authentication-provider user-service-ref="userDetailsService">
<password-encoder hash="plaintext" />
</authentication-provider>
</authentication-manager>
</beans:beans>
这是我的 web.xml：
<web-app id="WebApp_ID" version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>Spring MVC Application</display-name>
<!-- Spring MVC -->
<servlet>
<servlet-name>mvc-dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>mvc-dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- This listener creates the root application Context -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/applicationContext.xml,
/WEB-INF/spring-security.xml
</param-value>
</context-param>
<!-- Spring Security -->
<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>
这是我的 applicationContext.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:annotation-config/>
<!-- Load everything except @Controllers -->
<context:component-scan base-package="com">
<context:exclude-filter expression="org.springframework.stereotype.Controller"
type="annotation" />
</context:component-scan>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- <property name="packagesToScan">
<list>
<value>com.service</value>
<value>com.dao</value>
</list>
</property> -->
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/tutospringsource" />
<property name="username" value="root" />
<property name="password" value="password" />
</bean>
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/pages/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames">
<list>
<value>mymessages</value>
</list>
</property>
</bean>
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="save*" />
<tx:method name="*" read-only="false" />
</tx:attributes>
</tx:advice>
最后，我的 mvc-dispatcher-servlet.xml：
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:annotation-config />
<context:property-placeholder location="classpath:hibernate.properties" />
<!-- Load @Controllers only -->
<context:component-scan base-package="com.controller"
use-default-filters="false">
<context:include-filter expression="org.springframework.stereotype.Controller"
type="annotation" />
</context:component-scan>
</beans>
我的 AddUserFormController：
@Controller
@RequestMapping("/register.htm")
public class AddUserFormController {
private UserDetailsServiceImpl userDetailsService;
@Autowired
public void setUserDetailsService(UserDetailsServiceImpl userDetailsService) {
this.userDetailsService = userDetailsService;
}
我的 UserDetailsServiceImpl：
package com.service;
@Service("userDetailsService")
@Transactional
public class UserDetailsServiceImpl implements UserDetailsService {
@Autowired
private UserEntityDAO dao;
@Autowired
private Assembler assembler;