java - 使用 Spring MVC 成功登录后仍然可以返回登录页面

Question

我第一次使用 Java 和 Spring MVC 实现 Web 应用程序。我还为其实现了登录功能。但是，我遇到了一个问题。

问题:成功登录后，我的页面会重定向到目标页面，但如果我在浏览器中输入登录页面，那么尽管 session 处于 Activity 状态，它会再次显示登录页面。

理想情况下，它应该转到默认目标页面。下面是我的 XML 设置文件。感谢您提前提供的任何帮助。

XML 配置:

<http pattern="/resources/**" security="none" />
<http pattern="/admin/login" security="none" />
<http pattern="/admin/login/failed" security="none" />
<http pattern="/admin/login/invalidsession" security="none" />

<http auto-config="true"  use-expressions="false">
	<intercept-url pattern="/admin/**" access="ROLE_USER" />
	<form-login login-page="/admin/login" default-target-url="/admin/student" authentication-failure-url="/admin/login/failed" />
	<logout logout-success-url="/admin/login" delete-cookies="JSESSIONID" />
	<session-management session-fixation-protection="newSession" invalid-session-url="/admin/login/invalidsession">
       	<concurrency-control max-sessions="1" error-if-maximum-exceeded="true" />
    </session-management>
</http>

<authentication-manager alias="authenticationManager">
	<authentication-provider>
		<user-service>
			<user name="roul" password="roul" authorities="ROLE_USER" />
		</user-service>
	</authentication-provider>
</authentication-manager>

答案:

在得到 jgr 和 Paul 的建议后，我终于完成了。在这里，我必须修改我的 XML 配置，因为我已将登录页面设置为“无”安全性。因此，在使用以下代码获取该页面的身份验证类型时:

身份验证auth = SecurityContextHolder.getContext().getAuthentication();

然后我就变得空了。因此，为了避免这种情况，我必须更改 XML 设置，如下所示。

更新的 XML 配置:

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

    <security:global-method-security secured-annotations="enabled" />
    
    <security:http auto-config="true">
        <!-- Restrict URLs based on role -->
        <security:intercept-url pattern="/admin/login" access="IS_AUTHENTICATED_ANONYMOUSLY" />
        <security:intercept-url pattern="/admin/login/failed" access="IS_AUTHENTICATED_ANONYMOUSLY" />
        <security:intercept-url pattern="/admin/login/invalidsession" access="IS_AUTHENTICATED_ANONYMOUSLY" />
        <security:intercept-url pattern="/resources/**" access="IS_AUTHENTICATED_ANONYMOUSLY" />

        <security:intercept-url pattern="/admin/**" access="ROLE_USER" />

        <!-- Override default login and logout pages -->
        <security:form-login login-page="/admin/login"
                             default-target-url="/admin/student" 
                             authentication-failure-url="/admin/login/failed" />
        <security:logout logout-success-url="/admin/login" delete-cookies="JSESSIONID" />
        <security:session-management session-fixation-protection="newSession" invalid-session-url="/admin/login/invalidsession">
        	<security:concurrency-control max-sessions="1" error-if-maximum-exceeded="true" />
    	</security:session-management>
    </security:http>

    <security:authentication-manager>
        <security:authentication-provider>
			<security:user-service>
				<security:user name="roul" password="roul" authorities="ROLE_USER" />
			</security:user-service>
		</security:authentication-provider>
    </security:authentication-manager>

</beans>

注意:我引用了以下 URL:http://www.springbyexample.org/examples/simple-spring-security-webapp-spring-config.html

Answer 1

只需将一些代码添加到您的“/admin/login” Controller ，您可以在其中检查用户是否登录。

    Authentication auth = SecurityContextHolder.getContext().getAuthentication();

    if (!(auth instanceof AnonymousAuthenticationToken))
    {
        return "redirect:/admin/student";
    }