java - org.springframework.security.web.FilterChainProxy.getFilters 中的 NullPointerException

Question

我尝试使用 spring-security，但出现了这个错误。

java.lang.NullPointerException
at org.springframework.security.web.FilterChainProxy.getFilters(FilterChainProxy.java:223)
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:196)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

我在 web.xml 中包含过滤器

 <?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

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

<filter>
    <filter-name>encoding-filter</filter-name>
    <filter-class>
        org.springframework.web.filter.CharacterEncodingFilter
    </filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
    <param-name>forceEncoding</param-name>
    <param-value>true</param-value>
    </init-param>
</filter>

<filter-mapping>
    <filter-name>encoding-filter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

  <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>

<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<display-name>Spring MVC Application</display-name>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>

<servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>0</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

并在 applicationContext 文件中为这个过滤器创建一个 bean:

<bean id="springSecurityFilterChain" class="org.springframework.security.web.FilterChainProxy"> </bean>

在我在 applicationContext 文件中注册这个 bean 之前我有一个错误 no bean named 'springSecurityFilterChain' is defined

我没有使用 spring-security.xml 进行配置，而是在 SecurityConfig 类中配置安全。

public class SecurityConfig extends WebSecurityConfigurerAdapter {

@Autowired
private UserDetailsServiceImpl userDetailsService;

@Autowired
public void registerGlobalAuthentication(AuthenticationManagerBuilder auth) throws Exception {
    auth
            .userDetailsService(userDetailsService);
}

@Override
protected void configure(HttpSecurity http) throws Exception {
    http.csrf()
            .disable()
            .authorizeRequests()
            .antMatchers("/resources/**", "/**").permitAll()
            .anyRequest().permitAll()
            .and();

    http.formLogin()
            .loginPage("/login")
            .loginProcessingUrl("/j_spring_security_check")
            .failureUrl("/login?error")
            .usernameParameter("j_username")
            .passwordParameter("j_password")
            .permitAll();

    http.logout()
            .permitAll()
            .logoutUrl("/logout")
            .logoutSuccessUrl("/login?logout")
            .invalidateHttpSession(true);

}   

我认为是 spring-security 文件配置的一些问题，但我不明白哪里出了问题。

Answer 1

我已经弄清楚这里发生了什么，但我认为您最好只坚持使用 Java Config 或 XML 配置，而不是在集成 Spring MVC 和安全性方面混合和匹配它们。

在 XML 配置中，springSecurityFilterChain 由 spring-security.xml 中的 http 命名空间创建。引用here .由于您已切换到 java 配置，因此没有创建 springSecurityFilterChain，这正是应用程序所提示的。

要在其中创建 springSecurityFilterChain，您需要执行以下 2 个步骤。

第一步

从您的 web.xml 中删除以下内容

 <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>

第 2 步

创建一个 AbstractSecurityWebApplicationInitializer，它将为您创建 springsecurityfilterchain。

public class SpringSecurityInitializer extends
        AbstractSecurityWebApplicationInitializer {
}

现在 AbstractSecurityWebApplicationInitializer documentation说当与 AbstractSecurityWebApplicationInitializer() 一起使用时，此类通常与 AbstractContextLoaderInitializer 的子类一起使用。

所以现在您必须自己创建 AbstractContextLoaderInitializer。为此，我做了 2 处更改

第 1 步:- 从 web.xml 中删除下面

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

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

第 2 步:- 创建一个类 SpringAnnotationWebInitializer 和 ApplicationContextSpring 将具有以下内容

public class SpringAnnotationWebInitializer extends
        AbstractContextLoaderInitializer {

    @Override
    protected WebApplicationContext createRootApplicationContext() {
        AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
        applicationContext.register(ApplicationContextSpring.class);
        return applicationContext;
    }

}

和ApplicationContextSpring将是

@Configuration
@ImportResource("classpath:applicationContext.xml")
@Import(SecurityConfig.class)
public class ApplicationContextSpring {

}

正如我所说，创建 java 或 xml 配置要好得多。