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

Question

我在使用 Spring Security 时遇到了这个问题。

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

在这个类中我想覆盖方法“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);
    }

    //...

}   

一切正常，一切正常。

问题是“MyDaoAuthenticationProvider”组件没有加载到 Spring 上下文中。所以我不能在这个类中注入(inject)或 Autowiring 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 注释:

@Autowired
MyDaoAuthenticationProvider provider;

应用程序在启动时崩溃并出现此错误:

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

我需要做什么来解决这个问题？谢谢。

编辑

解决方案

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 UserDetailsS​​ervice”。

此外，bean 被加载到 Spring 上下文中，因此 DaoAuthenticationProvider 中的所有注入(inject)组件都被正确解析。

Answer 1

Error creating bean with name 'myDaoAuthenticationProvider' [...] A UserDetailsService must be set

您的 MyDaoAuthenticationProvider 没有 UserDetailsS​​ervice。您必须实现、注入(inject)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现 DaoAuthenticationProvider。也许您真的想实现一个通用的 AuthenticationProvider，或者使用它的其他实现类。