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我正在尝试从实现ApplicationListener<AuthenticationSuccessEvent>成功登录接口的类（Spring 3.2.2 和 Spring Security 3.2.0 M1）调用受保护的方法。这是我之前的问题。

该应用程序在以下环境下运行。

  • 春天 3.2.2
  • 春季安全 3.2.0
  • JPA 2.0
  • JSF 2.1.9
  • MySQL 5.6.11
  • JDK-7u11
  • NetBeans 7.2.1

我已将以下与 Spring 安全性相关的库添加到类路径中。

  • spring-security-core-3.2.0.M1.jar
  • spring-security-config-3.2.0.M1.jar
  • spring-security-web-3.2.0.M1.jar

实现的类ApplicationListener<AuthenticationSuccessEvent>如下。

package loginsuccesshandler;

import admin.dao.service.StateService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationListener;
import org.springframework.security.authentication.event.AuthenticationSuccessEvent;
import org.springframework.stereotype.Service;

@Service
public final class AuthSuccessHandler implements ApplicationListener<AuthenticationSuccessEvent>
{
    @Autowired
    private StateService stateService;

    @Override
    public void onApplicationEvent(AuthenticationSuccessEvent event) 
    {
        System.out.println(event.getAuthentication());
        System.out.println("rowCount = "+stateService.rowCount());
    }
}

即使使用正确的凭据并显示以下消息，这也可以防止用户登录（这只是一个示例。根本不需要在成功验证时计算状态数）。

在 SecurityContext 中找不到 Authentication 对象

引发事件。方法内的第一条语句onApplicationEvent()显示以下内容。

org.springframework.security.authentication.UsernamePasswordAuthenticationToken@45264a59: Principal: org.springframework.security.core.userdetails.User@586034f:Username: admin; 
Password: [PROTECTED]; 
Enabled: true; 
AccountNonExpired: true; 
credentialsNonExpired: true; 
AccountNonLocked: true; 
Granted Authorities: ROLE_ADMIN; 
Credentials: [PROTECTED]; 
Authenticated: true; 
Details: org.springframework.security.web.authentication.WebAuthenticationDetails@380f4: RemoteIpAddress: 127.0.0.1; 
SessionId: 88777A678DC5BB0272F84CA4BC61FAF2;
Granted Authorities: ROLE_ADMIN

所以看起来用户已通过身份验证并且身份验证对象可用。

我的springSecurity.xml文件如下所示。

<?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"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
           http://www.springframework.org/schema/security
           http://www.springframework.org/schema/security/spring-security-3.1.xsd">

    <http pattern="/utility/Login.jsf*" security="none"/>
    <debug/>
    <http auto-config='true' use-expressions="true" disable-url-rewriting="true">
        <session-management session-fixation-protection="newSession">
            <concurrency-control max-sessions="1" error-if-maximum-exceeded="true" />
        </session-management>

        <intercept-url pattern="/admin_side/**" access="hasRole('ROLE_ADMIN')" requires-channel="any"/>
        <intercept-url pattern="/utility/Login.jsf" access="permitAll" requires-channel="any"/>
        <http-basic />
        <anonymous />

        <form-login login-processing-url="/j_spring_security_check" login-page="/utility/Login.jsf" authentication-success-handler-ref="loginSuccessHandler" authentication-failure-handler-ref="authenticationFailureHandler"/>
        <logout logout-success-url="/utility/Login.jsf" invalidate-session="true" delete-cookies="JSESSIONID"/>
    </http>

    <authentication-manager>
       <authentication-provider>
            <jdbc-user-service data-source-ref="dataSource"
               users-by-username-query="select email_id, password, enabled from user_table where lower(email_id)=lower(?)"
               authorities-by-username-query="select ut.email_id, ur.authority from user_table ut, user_roles ur where ut.user_id=ur.user_id and lower(ut.email_id)=lower(?)"/>
       </authentication-provider>
    </authentication-manager>

    <beans:bean id="loginSuccessHandler" class="loginsuccesshandler.LoginSuccessHandler"/>
    <beans:bean id="authenticationFailureHandler" class="loginsuccesshandler.AuthenticationFailureHandler" />        

    <global-method-security secured-annotations="enabled" pre-post-annotations="enabled" proxy-target-class="false">
        <protect-pointcut expression="execution(* admin.dao.*.*(..))" access="ROLE_ADMIN"/>
    </global-method-security>
</beans:beans>

当文件中省略以下 XML 行时，Spring 安全性工作正常spring-security.xml。

<global-method-security secured-annotations="enabled" proxy-target-class="false">
     <protect-pointcut expression="execution(* admin.dao.*.*(..))" access="ROLE_ADMIN"/>
</global-method-security>

ApplicationListener<AuthenticationSuccessEvent>可以从实现接口的类中调用受保护的方法（应用了方法安全性）吗？如果是，那么在我的情况下缺少什么？到目前为止，我已经点击了数千个链接，但找不到任何线索。

该application-context.xml文件。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:jee="http://www.springframework.org/schema/jee"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
       http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <context:component-scan base-package="admin.mangedbean loginsuccesshandler" use-default-filters="false">
        <context:include-filter expression="org.springframework.stereotype.Controller" type="annotation"/>
        <context:include-filter expression="org.springframework.web.bind.annotation.ControllerAdvice" type="annotation"/>  
    </context:component-scan>

    <mvc:annotation-driven/>
    <context:annotation-config/>

    <bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>            

    <bean class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" id="entityManagerFactory" >
        <property name="jpaProperties">
            <props>
                <prop key="hibernate.enable_lazy_load_no_trans">true</prop>
            </props>
        </property>

        <property name="jpaPropertyMap">
            <map>
              <entry key="eclipselink.weaving" value="false"/>
            </map>
        </property>

        <property name="loadTimeWeaver">
            <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>
        </property>
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory"/>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager"/>

    <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
        <property name="jndiName" value="java:comp/env/jdbc/social_networking"/>
    </bean>

    <!--The bean shown in the beginning is configured here-->
    <bean id="authSuccessHandler" class="loginsuccesshandler.AuthSuccessHandler"/> 

    <bean id="testService" class="admin.dao.TestDAO"/>
    <bean id="stateService" class="admin.dao.StateDAO"/>
    <bean id="sharableService" class="admin.dao.SharableDAO"/>
</beans>

该web.xml文件。

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">        

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/applicationContext.xml
            /WEB-INF/spring-security.xml
        </param-value>
    </context-param>

    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <!--<param-value>Development</param-value>-->
        <param-value>Production</param-value>
    </context-param>

    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>/WEB-INF/log4j.properties</param-value>
    </context-param>

    <context-param>
        <param-name>log4jExposeWebAppRoot</param-name>
        <param-value>false</param-value>
    </context-param>

    <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>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>FORWARD</dispatcher>
    </filter-mapping>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>        

    <listener>
        <listener-class>org.springframework.security.web.session.HttpSessionEventPublisher</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.jsf</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>

    <security-constraint>
        <display-name>Restrict direct access to XHTML files</display-name>
        <web-resource-collection>
            <web-resource-name>XHTML files</web-resource-name>
            <url-pattern>*.xhtml</url-pattern>
        </web-resource-collection>
        <auth-constraint />
    </security-constraint> 

    <session-config>
        <session-timeout>
            120
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>/utility/Login.jsf</welcome-file>
    </welcome-file-list>

    <resource-ref>
        <res-ref-name>jdbc/social_networking</res-ref-name>
        <res-type>javax.sql.DataSource</res-type>
        <res-auth>Container</res-auth>
    </resource-ref>
</web-app>

当尝试登录最终失败时，可以在下面看到调试信息。

DEBUG [http-apr-8080-exec-55] (AntPathRequestMatcher.java:116) - Checking match of request : '/j_spring_security_check'; against '/utility/login.jsf*'
DEBUG [http-apr-8080-exec-55] (AntPathRequestMatcher.java:116) - Checking match of request : '/j_spring_security_check'; against '/utility/login.jsf*'
DEBUG [http-apr-8080-exec-55] (FilterChainProxy.java:337) - /j_spring_security_check at position 1 of 13 in additional filter chain; firing Filter: 'ChannelProcessingFilter'
DEBUG [http-apr-8080-exec-55] (AntPathRequestMatcher.java:116) - Checking match of request : '/j_spring_security_check'; against '/admin_side/**'
DEBUG [http-apr-8080-exec-55] (AntPathRequestMatcher.java:116) - Checking match of request : '/j_spring_security_check'; against '/utility/login.jsf'
DEBUG [http-apr-8080-exec-55] (FilterChainProxy.java:337) - /j_spring_security_check at position 2 of 13 in additional filter chain; firing Filter: 'SecurityContextPersistenceFilter'
DEBUG [http-apr-8080-exec-55] (HttpSessionSecurityContextRepository.java:139) - HttpSession returned null object for SPRING_SECURITY_CONTEXT
DEBUG [http-apr-8080-exec-55] (HttpSessionSecurityContextRepository.java:85) - No SecurityContext was available from the HttpSession: org.apache.catalina.session.StandardSessionFacade@1103da5. A new one will be created.
DEBUG [http-apr-8080-exec-55] (FilterChainProxy.java:337) - /j_spring_security_check at position 3 of 13 in additional filter chain; firing Filter: 'ConcurrentSessionFilter'
DEBUG [http-apr-8080-exec-55] (FilterChainProxy.java:337) - /j_spring_security_check at position 4 of 13 in additional filter chain; firing Filter: 'WebAsyncManagerIntegrationFilter'
DEBUG [http-apr-8080-exec-55] (FilterChainProxy.java:337) - /j_spring_security_check at position 5 of 13 in additional filter chain; firing Filter: 'LogoutFilter'
DEBUG [http-apr-8080-exec-55] (FilterChainProxy.java:337) - /j_spring_security_check at position 6 of 13 in additional filter chain; firing Filter: 'UsernamePasswordAuthenticationFilter'
DEBUG [http-apr-8080-exec-55] (AbstractAuthenticationProcessingFilter.java:189) - Request is to process authentication
DEBUG [http-apr-8080-exec-55] (ProviderManager.java:152) - Authentication attempt using org.springframework.security.authentication.dao.DaoAuthenticationProvider
DEBUG [http-apr-8080-exec-55] (JdbcTemplate.java:637) - Executing prepared SQL query
DEBUG [http-apr-8080-exec-55] (JdbcTemplate.java:572) - Executing prepared SQL statement [select email_id, password, enabled from user_table where lower(email_id)=lower(?)]
DEBUG [http-apr-8080-exec-55] (DataSourceUtils.java:110) - Fetching JDBC Connection from DataSource
DEBUG [http-apr-8080-exec-55] (DataSourceUtils.java:327) - Returning JDBC Connection to DataSource
DEBUG [http-apr-8080-exec-55] (JdbcTemplate.java:637) - Executing prepared SQL query
DEBUG [http-apr-8080-exec-55] (JdbcTemplate.java:572) - Executing prepared SQL statement [select ut.email_id, ur.authority from user_table ut, user_roles ur where ut.user_id=ur.user_id and lower(ut.email_id)=lower(?)]
DEBUG [http-apr-8080-exec-55] (DataSourceUtils.java:110) - Fetching JDBC Connection from DataSource
DEBUG [http-apr-8080-exec-55] (DataSourceUtils.java:327) - Returning JDBC Connection to DataSource
DEBUG [http-apr-8080-exec-55] (AbstractBeanFactory.java:246) - Returning cached instance of singleton bean 'authSuccessHandler'
DEBUG [http-apr-8080-exec-55] (AbstractBeanFactory.java:246) - Returning cached instance of singleton bean 'org.springframework.security.core.session.SessionRegistryImpl#0'
DEBUG [http-apr-8080-exec-55] (AbstractFallbackTransactionAttributeSource.java:106) - Adding transactional method 'rowCount' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''
DEBUG [http-apr-8080-exec-55] (DelegatingMethodSecurityMetadataSource.java:65) - Caching method [CacheKey[admin.dao.StateDAO; public abstract java.lang.Long admin.dao.service.StateService.rowCount()]] with attributes [ROLE_ADMIN]
DEBUG [http-apr-8080-exec-55] (AbstractBeanFactory.java:246) - Returning cached instance of singleton bean 'transactionManager'
DEBUG [http-apr-8080-exec-55] (AbstractPlatformTransactionManager.java:366) - Creating new transaction with name [admin.dao.StateDAO.rowCount]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly; ''
DEBUG [http-apr-8080-exec-55] (JpaTransactionManager.java:369) - Opened new EntityManager [org.hibernate.ejb.EntityManagerImpl@84ff11] for JPA transaction
DEBUG [http-apr-8080-exec-55] (JpaTransactionManager.java:408) - Not exposing JPA transaction [org.hibernate.ejb.EntityManagerImpl@84ff11] as JDBC transaction because JpaDialect [org.springframework.orm.jpa.DefaultJpaDialect@d9dbb8] does not support JDBC Connection retrieval
DEBUG [http-apr-8080-exec-55] (AbstractSecurityInterceptor.java:194) - Secure object: ReflectiveMethodInvocation: public abstract java.lang.Long admin.dao.service.StateService.rowCount(); target is of class [admin.dao.StateDAO]; Attributes: [ROLE_ADMIN]
DEBUG [http-apr-8080-exec-55] (AbstractBeanFactory.java:246) - Returning cached instance of singleton bean 'authSuccessHandler'
DEBUG [http-apr-8080-exec-55] (AbstractBeanFactory.java:246) - Returning cached instance of singleton bean 'org.springframework.security.core.session.SessionRegistryImpl#0'
DEBUG [http-apr-8080-exec-55] (AbstractPlatformTransactionManager.java:844) - Initiating transaction rollback
DEBUG [http-apr-8080-exec-55] (JpaTransactionManager.java:534) - Rolling back JPA transaction on EntityManager [org.hibernate.ejb.EntityManagerImpl@84ff11]
DEBUG [http-apr-8080-exec-55] (JpaTransactionManager.java:594) - Closing JPA EntityManager [org.hibernate.ejb.EntityManagerImpl@84ff11] after transaction
DEBUG [http-apr-8080-exec-55] (EntityManagerFactoryUtils.java:338) - Closing JPA EntityManager
DEBUG [http-apr-8080-exec-55] (AbstractAuthenticationProcessingFilter.java:346) - Authentication request failed: org.springframework.security.authentication.AuthenticationCredentialsNotFoundException: An Authentication object was not found in the SecurityContext
DEBUG [http-apr-8080-exec-55] (AbstractAuthenticationProcessingFilter.java:347) - Updated SecurityContextHolder to contain null Authentication
DEBUG [http-apr-8080-exec-55] (AbstractAuthenticationProcessingFilter.java:348) - Delegating to authentication failure handler loginsuccesshandler.AuthenticationFailureHandler@14883a3
DEBUG [http-apr-8080-exec-55] (DefaultRedirectStrategy.java:36) - Redirecting to '/SocialNetworking/utility/Login.jsf'
DEBUG [http-apr-8080-exec-55] (HttpSessionSecurityContextRepository.java:269) - SecurityContext is empty or contents are anonymous - context will not be stored in HttpSession.
DEBUG [http-apr-8080-exec-55] (SecurityContextPersistenceFilter.java:97) - SecurityContextHolder now cleared, as request processing completed
DEBUG [http-apr-8080-exec-49] (AntPathRequestMatcher.java:116) - Checking match of request : '/utility/login.jsf'; against '/utility/login.jsf*'
DEBUG [http-apr-8080-exec-49] (AntPathRequestMatcher.java:116) - Checking match of request : '/utility/login.jsf'; against '/utility/login.jsf*'
DEBUG [http-apr-8080-exec-49] (FilterChainProxy.java:180) - /utility/Login.jsf has an empty filter list

最后一件事情：

当我放弃这个bean并从application-context.xml文件中注销时，登录成功，但在服务器控制台上可以看到以下信息。

DEBUG [http-apr-8080-exec-165] (HttpSessionSecurityContextRepository.java:139) - HttpSession returned null object for SPRING_SECURITY_CONTEXT
DEBUG [http-apr-8080-exec-165] (HttpSessionSecurityContextRepository.java:85) - No SecurityContext was available from the HttpSession: org.apache.catalina.session.StandardSessionFacade@b910c1. A new one will be created.
4

10 回答 10

35

安全的授权检查部分从 中获取经过身份验证的对象SecurityContext，该对象将在请求通过 spring 安全过滤器时设置。我在这里的假设是登录后不久，这没有被设置。您可能可以使用下面给出的技巧来设置值。

try {
    SecurityContext ctx = SecurityContextHolder.createEmptyContext();
    SecurityContextHolder.setContext(ctx);
    ctx.setAuthentication(event.getAuthentication());

    //Do what ever you want to do

} finally {
    SecurityContextHolder.clearContext();
}

更新：

您还可以查看InteractiveAuthenticationSuccessEvent，一旦设置，它将被调用SecurityContext。

于 2013-05-24T03:17:32.250 回答
14

如果您在创建时将@PreAuthorize或@PostAuthorize放入 Bean 中，也会发生这种情况。我建议将此类注释移至感兴趣的方法。

于 2018-03-13T14:36:28.857 回答
4

正如@Arun P Johny 已经指出的那样，问题的根本原因是在AuthenticationSuccessEvent处理时SecurityContextHolder没有被身份验证对象填充。因此，任何声明性授权检查（必须从中获取用户权限SecurityContextHolder）都将不起作用。我给你另一个想法如何解决这个问题。成功验证后，您可以通过两种方式立即运行自定义代码：

  1. 听AuthenticationSuccessEvent
  2. 提供您的自定义AuthenticationSuccessHandler实现。

AuthenticationSuccessHandler与第一种方式相比，有一个重要优势：SecurityContextHolder将已被填充。因此，只需将您的stateService.rowCount()调用转移到loginsuccesshandler.LoginSuccessHandler#onAuthenticationSuccess(...)方法中，问题就会消失。

于 2013-05-24T10:31:29.700 回答
3

有类似的问题。我添加了这里给出的监听器

https://stackoverflow.com/questions/3145936/spring-security-j-spring-security-logout-problem

它对我在 web.xml 中添加以下行很有用。很晚才发布，应该可以帮助寻找答案的人。

<listener>
    <listener-class> org.springframework.security.web.session.HttpSessionEventPublisher</listener-class>
</listener>
于 2014-01-01T11:16:30.113 回答
2

我在使用 SpringBoot 2.1.4 和 Spring Security 5（我相信）时遇到了同样的错误。在尝试了 Google 提供的所有功能一天后，我发现了我的案例中的错误原因。我有一个微服务设置，身份验证服务器与资源服务器不同。我的 application.yml 中有以下几行，尽管包含了 dependenciesspring-boot-starter-security和. 我在导致错误的属性（在开发期间）中包含了以下内容。spring-security-oauth2spring-security-jwt

spring:
  autoconfigure:
    exclude: org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration

评论它为我解决了它。

#spring:
#  autoconfigure:
#    exclude: org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration

希望，它可以帮助某人。

于 2019-10-22T10:39:46.420 回答
1

对我来说，问题在于 ContextRefreshedEvent 处理程序。我正在做一些数据初始化，但当时在应用程序中尚未设置身份验证。这是一个问题 22，因为系统需要身份验证才能授权，并且需要授权才能获取身份验证详细信息:)。我最终将授权从类级别放松到方法级别。

于 2017-10-30T23:26:48.880 回答
0

如果您使用 Content-Type: application/json 而不是 Content-Type:application/x-www-form-urlencoded 也会出现此错误

于 2021-12-07T08:16:21.710 回答
0

在我的情况下，我只是忘记初始化 Spring Security，这可以通过在使用空 web.xml 文件时扩展 AbstractSecurityWebApplicationInitializer 来完成。

于 2021-12-22T15:55:08.747 回答
0

我遇到了同样的问题，我通过使用以下注释解决了它：

@EnableAutoConfiguration(exclude = {
        SecurityAutoConfiguration.class
})
public class Application {...}

我认为这种行为与 Abhishek 解释的相同

于 2021-02-22T13:43:54.893 回答
0

我的问题是我需要正确禁用安全性并实施我自己的预授权。与 OP 不同，我试图完全禁用身份验证并实施我自己的解决方案。

@Configuration
@EnableWebSecurity
public class CustomWebSecurityConfigurerAdapter extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity.csrf().disable().authorizeRequests().antMatchers("/**").permitAll();
    }

}
于 2022-02-11T00:33:16.593 回答