java - 为什么不能 Autowiring 带有@Transactional 方法的类？

标签 java spring spring-security

我将 Spring Security 与 WAFFLE 过滤器结合使用，该过滤器根据 ActiveDirectory 服务器对用户进行身份验证。 我还创建了一个额外的过滤器来根据我的数据库对用户进行身份验证(它只是检查是否 以前经过身份验证的用户在数据库中)。这是使用 UserDetailsS​​ervice 的实现完成的。

这种组合一直有效，直到我向服务添加了一个 @Transactional 注释方法。现在的服务 不能自动连接到过滤器。

这是服务类:

@Service
public class UserService implements UserDetailsService {

    @Autowired
    private UserRepository userRepository;

    @Autowired
    private LdapUserDao ldapUserDao;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        return getUserByUsername(username);
    }

    public User getUserByUsername(final String username) {
        final User databaseUser = userRepository.findByUsername(username);
        final User ldapUser = ldapUserDao.findByUsername(username);

        if (null == databaseUser || null == ldapUser) {
            return null;
        }

        final User user = mergeUsers(databaseUser, ldapUser);

        return user;
    }

    public List<User> getAllUsers() {
        return userRepository.findAll();
    }

    @Transactional
    public void storeUser(final User user) {
        userRepository.save(user);
    }

    private User mergeUsers(final User database, final User ldap) {
        final User mergedUser = new User();

        mergedUser.setId(database.getId());
        mergedUser.setUsername(database.getUsername());
        mergedUser.setEnabled(database.isEnabled());
        mergedUser.setRoles(database.getRoles());

        mergedUser.setEmail(ldap.getEmail());
        mergedUser.setFirstName(ldap.getFirstName());
        mergedUser.setLastName(ldap.getLastName());
        mergedUser.setLocale(ldap.getLocale());

        return mergedUser;
    }

}

这是过滤器:

public class WaffleAuthenticationWrapperFilter extends GenericFilterBean {

    @Autowired
    private UserService userService;

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
            ServletException {
        final SecurityContext securityContext = SecurityContextHolder.getContext();
        final Authentication authentication = securityContext.getAuthentication();

        if (null == authentication || !(authentication instanceof WindowsAuthenticationToken)) {
            chain.doFilter(request, response);
            return;
        }

        final WindowsAuthenticationToken waffleAuthentication = (WindowsAuthenticationToken) authentication;
        final String username = waffleAuthentication.getName().replaceAll("^.*\\\\", "");
        final User user = userService.getUserByUsername(username);

        if (null == user) {
            securityContext.setAuthentication(null);
            return;
        }

        final WaffleAuthenticationWrapper authenticationWrapper = new WaffleAuthenticationWrapper(waffleAuthentication,
                user);

        securityContext.setAuthentication(authenticationWrapper);

        chain.doFilter(request, response);
    }

}

一旦我删除了 @Transactional，项目就会再次编译。为什么不能将方法注释为 @Transactional？

这是堆栈跟踪:

Exception in thread "main" org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:133)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
    at my.project.App.main(App.java:13)
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:98)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:75)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:378)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:155)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:157)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:130)
    ... 7 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration.setFilterChainProxySecurityConfigurer(org.springframework.security.config.annotation.ObjectPostProcessor,java.util.List) throws java.lang.Exception; nested exception is org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSecurityConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.auth.WaffleAuthenticationWrapperFilter my.project.config.WebSecurityConfig.waffleAuthenticationWrapperFilter; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'waffleAuthenticationWrapperFilter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:368)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1119)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1014)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.boot.context.embedded.ServletContextInitializerBeans.getOrderedBeansOfType(ServletContextInitializerBeans.java:209)
    at org.springframework.boot.context.embedded.ServletContextInitializerBeans.addAsRegistrationBean(ServletContextInitializerBeans.java:165)
    at org.springframework.boot.context.embedded.ServletContextInitializerBeans.addAsRegistrationBean(ServletContextInitializerBeans.java:160)
    at org.springframework.boot.context.embedded.ServletContextInitializerBeans.addAdaptableBeans(ServletContextInitializerBeans.java:143)
    at org.springframework.boot.context.embedded.ServletContextInitializerBeans.<init>(ServletContextInitializerBeans.java:74)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getServletContextInitializerBeans(EmbeddedWebApplicationContext.java:234)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.selfInitialize(EmbeddedWebApplicationContext.java:221)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.access$000(EmbeddedWebApplicationContext.java:84)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext$1.onStartup(EmbeddedWebApplicationContext.java:206)
    at org.springframework.boot.context.embedded.tomcat.TomcatStarter.onStartup(TomcatStarter.java:54)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5151)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire method: public void org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration.setFilterChainProxySecurityConfigurer(org.springframework.security.config.annotation.ObjectPostProcessor,java.util.List) throws java.lang.Exception; nested exception is org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSecurityConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.auth.WaffleAuthenticationWrapperFilter my.project.config.WebSecurityConfig.waffleAuthenticationWrapperFilter; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'waffleAuthenticationWrapperFilter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:649)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
    ... 35 more
Caused by: org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSecurityConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.auth.WaffleAuthenticationWrapperFilter my.project.config.WebSecurityConfig.waffleAuthenticationWrapperFilter; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'waffleAuthenticationWrapperFilter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate(StandardBeanExpressionResolver.java:164)
    at org.springframework.beans.factory.support.AbstractBeanFactory.evaluateBeanDefinitionString(AbstractBeanFactory.java:1365)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:957)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredMethodElement.inject(AutowiredAnnotationBeanPostProcessor.java:606)
    ... 37 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'webSecurityConfig': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.auth.WaffleAuthenticationWrapperFilter my.project.config.WebSecurityConfig.waffleAuthenticationWrapperFilter; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'waffleAuthenticationWrapperFilter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:523)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:512)
    at org.springframework.security.config.annotation.web.configuration.AutowiredWebSecurityConfigurersIgnoreParents.getWebSecurityConfigurers(AutowiredWebSecurityConfigurersIgnoreParents.java:52)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:112)
    at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:129)
    at org.springframework.expression.spel.ast.MethodReference.access$000(MethodReference.java:49)
    at org.springframework.expression.spel.ast.MethodReference$MethodValueRef.getValue(MethodReference.java:342)
    at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:88)
    at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:120)
    at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:242)
    at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate(StandardBeanExpressionResolver.java:161)
    ... 41 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.auth.WaffleAuthenticationWrapperFilter my.project.config.WebSecurityConfig.waffleAuthenticationWrapperFilter; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'waffleAuthenticationWrapperFilter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
    ... 63 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'waffleAuthenticationWrapperFilter': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1127)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
    ... 65 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private my.project.services.UserService my.project.auth.WaffleAuthenticationWrapperFilter.userService; nested exception is java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
    ... 76 more
Caused by: java.lang.IllegalArgumentException: Can not set my.project.services.UserService field my.project.auth.WaffleAuthenticationWrapperFilter.userService to com.sun.proxy.$Proxy84
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
    at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(Unknown Source)
    at sun.reflect.UnsafeObjectFieldAccessorImpl.set(Unknown Source)
    at java.lang.reflect.Field.set(Unknown Source)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:557)
    ... 78 more

最佳答案

要应用 AOP，spring 使用代理，这些代理有两种类型 JDK 动态代理(基于接口(interface))和基于 CgLIB 的代理(基于类)。默认情况下，Spring 对实现 1 个或多个接口(interface)的类使用 JDK 动态代理。

在运行时，您会得到一个动态创建的对象(代理)，它实现了它所包装的类 (UserService) 的所有接口(interface) (UserDetailsS​​ervice)。因此，动态创建的对象是 UserDetailsS​​ervice 而不是 UserService。

因此无法将代理转换为 UserService 的错误。

你有(至少)两种方法来解决这个问题

  1. 接口(interface)程序
  2. 启用基于类的代理。

接口(interface)编程

当您调用 getUserByUsername 时，您需要创建一个新接口(interface)并实现它以及 UserDetailsS​​ervice。 

public interface UserService {
    User getUserByUsername(String username);
    void storeUser(User user);
    List<User> findAllUsers();
}

@Service("userService")
public class UserServiceImpl implements UserDetailsService, UserService { ... }

如果您这样做，您可以保持过滤器不变，因为 UserService 现在只是一个接口(interface)。如果您给接口(interface)另一个名称，您还必须将过滤器中的 UserService 字段更改为该类型。

启用基于类的代理

当您使用 spring boot 启用基于类的代理时，只需将属性添加到您的 application.properties 文件即可。

spring.aop.proxy-target-class=true

这将创建一个基于类的代理，这样您就可以保持过滤器的代码不变。

关于java - 为什么不能 Autowiring 带有@Transactional 方法的类？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30344084/

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