Question

我在Spring Security中遇到过这个问题。

我有一个带有SecurityConfig类的java-config实现，它扩展了WebSecurityConfigurerAdapter。

在这个课程中，我想覆盖方法“configure（）”

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true, proxyTargetClass = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter{

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        MyDaoAuthenticationProvider provider = new MyDaoAuthenticationProvider();
        provider.setPasswordEncoder(passwordEncoder());
        provider.setUserDetailsService(securityService);
        auth.authenticationProvider(provider);
    }

    //...

}

一切都好，而且有效。

问题是Spring上下文中没有加载“MyDaoAuthenticationProvider”组件。所以我不能在这个类中注入或自动装配任何组件：

public class MyDaoAuthenticationProvider extends DaoAuthenticationProvider {

    @Autowired
    AuthenticationHandler authenticationHandler;    // <- authenticationHandler is null, is not resolved

    @Override
    public Authentication authenticate(Authentication authentication) throws AuthenticationException {
        authenticationHandler.authenticate(authentication);    // <- NullPointerException in this point
    }

}

这是AuthenticationHandler类：

@Component
public class AuthenticationHandler {

    public void authenticate (Authentication authentication) {
        // do stuff
    }

}

如果我将@Component放在MyDaoAuthenticationProvider类上，并在SecurityConfig类中添加@Autowired批注：

@Autowired
MyDaoAuthenticationProvider provider;

应用程序崩溃时出现此错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myDaoAuthenticationProvider' defined in file [...\MyDaoAuthenticationProvider.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: A UserDetailsService must be set
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4812)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5255)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: A UserDetailsService must be set
    at org.springframework.util.Assert.notNull(Assert.java:115)
    at org.springframework.security.authentication.dao.DaoAuthenticationProvider.doAfterPropertiesSet(DaoAuthenticationProvider.java:105)
    at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.afterPropertiesSet(AbstractUserDetailsAuthenticationProvider.java:122)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
    ... 21 more

我需要做些什么来解决这个问题？感谢。

修改

解

感谢OrangeDog，我解决了这个实现的问题：

@Bean
public MyDaoAuthenticationProvider myAuthProvider() throws Exception {
    MyDaoAuthenticationProvider provider = new MyDaoAuthenticationProvider();
    provider.setPasswordEncoder(passwordEncoder());
    provider.setUserDetailsService(securityService);
    return provider;
}

@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.authenticationProvider(myAuthProvider());
}

使用此配置，bean已正确初始化，并且不再出现错误“java.lang.IllegalArgumentException：必须设置UserDetailsService”。

此外，bean被加载到Spring Context中，因此DaoAuthenticationProvider中所有注入的组件都被正确解析。

Answer 1

使用名称＆＃39; myDaoAuthenticationProvider＆＃39;创建bean时出错。 [...]必须设置UserDetailsService

您的MyDaoAuthenticationProvider没有UserDetailsService。您必须实现，注入和/或设置一个。例如，不使用@Component：

@Bean
public MyDaoAuthenticationProvider myAuthProvider() {
    MyDaoAuthenticationProvider provider = new MyDaoAuthenticationProvider();
    provider.setPasswordEncoder(passwordEncoder());
    provider.setUserDetailsService(securityService);
    return provider;
}

然后，您需要停止在configure方法中创建另一个。

如果您认为自己不需要，那么您可能不应该实施DaoAuthenticationProvider。也许您实际上想要实现泛型AuthenticationProvider，或者使用其他实现类。

如何将自定义DaoAuthenticationProvider加载到Spring上下文中？

1 个答案: