自定义登录filter

上篇文章我们说到，对于用户的登录，security通过定义一个filter拦截login路径来实现的，所以我们要实现自定义登录，需要自己定义一个filter，继承AbstractAuthenticationProcessingFilter，从request中提取到手机号和验证码，然后提交给AuthenticationManager：

public class SmsAuthenticationFilter extends AbstractAuthenticationProcessingFilter { public static final String SPRING_SECURITY_FORM_PHONE_KEY = "phone"; public static final String SPRING_SECURITY_FORM_VERIFY_CODE_KEY = "verifyCode"; private static final AntPathRequestMatcher DEFAULT_ANT_PATH_REQUEST_MATCHER = new AntPathRequestMatcher("/smsLogin", "POST"); protected SmsAuthenticationFilter() { super(DEFAULT_ANT_PATH_REQUEST_MATCHER); } @Override public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException, IOException, ServletException { String phone = request.getParameter(SPRING_SECURITY_FORM_PHONE_KEY); String verifyCode = request.getParameter(SPRING_SECURITY_FORM_VERIFY_CODE_KEY); if (StringUtils.isBlank(phone)){ phone = ""; } if (StringUtils.isBlank(verifyCode)){ verifyCode = ""; } SmsAuthenticationToken authenticationToken = new SmsAuthenticationToken(phone, verifyCode); setDetails(request,authenticationToken); return getAuthenticationManager().authenticate(authenticationToken); } protected void setDetails(HttpServletRequest request, SmsAuthenticationToken authRequest) { authRequest.setDetails(authenticationDetailsSource.buildDetails(request)); }}

其中SmsAuthenticationToken参照UsernamePasswordAuthenticationToken来实现：

public class SmsAuthenticationToken extends AbstractAuthenticationToken { private final Object principal; private Object credentials; public SmsAuthenticationToken(Object principal, Object credentials) { super(null); this.principal = principal; this.credentials = credentials; //初始化完成，但是还未认证 setAuthenticated(false); } public SmsAuthenticationToken(Collection<? extends GrantedAuthority> authorities, Object principal, Object credentials) { super(authorities); this.principal = principal; this.credentials = credentials; setAuthenticated(true); } @Override public Object getCredentials() { return credentials; } @Override public Object getPrincipal() { return principal; }}

自定义provider实现身份认证

我们知道AuthenticationManager最终会委托给Provider来实现身份验证，所以我们要判断验证码是否正确，需要自定义Provider：

@Slf4j@Componentpublic class SmsAuthenticationProvider implements AuthenticationProvider { @Autowired private UserDetailsService userDetailsService; @Override public Authentication authenticate(Authentication authentication) { Assert.isInstanceOf(SmsAuthenticationToken.class, authentication, () -> "SmsAuthenticationProvider.onlySupports Only SmsAuthenticationToken is supported"); SmsAuthenticationToken authenticationToken = (SmsAuthenticationToken) authentication; String phone = (String) authenticationToken.getPrincipal(); String verifyCode = (String) authenticationToken.getCredentials(); UserDetails userDetails = userDetailsService.loadUserByUsername(phone); if (userDetails == null){ throw new InternalAuthenticationServiceException("cannot get user info"); } //验证码是否正确 if (!StringUtils.equals(CacheUtil.getValue(phone),verifyCode)){ throw new AuthenticationCredentialsNotFoundException("验证码错误"); } return new SmsAuthenticationToken(userDetails.getAuthorities(),userDetails,verifyCode); } @Override public boolean supports(Class<?> authentication) { return authentication.isAssignableFrom(SmsAuthenticationToken.class); }}

上面的CacheUtil是封装的guava cache的实现，模拟发送验证码存储到内存中，在这个地方取出来做对比，如果对比失败就抛异常，对比成功就返回一个新的token，这个token中是包含了用户具有的权限的。

@Slf4jpublic class CacheUtil { private static final LoadingCache<String, String> CACHE = CacheBuilder.newBuilder() //基于容量回收：总数量100个 .maximumSize(100) //定时回收：没有写访问1分钟后失效清理 .expireAfterWrite(1, TimeUnit.MINUTES) //当在缓存中未找到所需的缓存项时，会执行CacheLoader的load方法加载缓存 .build(new CacheLoader<String, String>() { @Override public String load(String key) throws Exception { log.debug("没有找到缓存: {}",key); return ""; } }); public static void putValue(String key, String value){ CACHE.put(key,value); } public static String getValue(String key){ try { return CACHE.get(key); } catch (ExecutionException e) { e.printStackTrace(); } return ""; }}

身份认证结果回调

filter将手机号和验证码交给provider做验证，经过provider的校验，结果无非就两种，一种验证成功，一种验证失败，对于这两种不同的结果，我们需要实现两个handler，在获取到结果之后做回调。因为我们这儿只是简单的做url跳转，所以只需要继承SimpleUrlAuthenticationSuccessHandler：

对于success的：

@Componentpublic class SmsAuthSuccessHandler extends SimpleUrlAuthenticationSuccessHandler { public SmsAuthSuccessHandler() { super("/index"); }}

对于failure的：

@Componentpublic class SmsAuthFailureHandler extends SimpleUrlAuthenticationFailureHandler { public SmsAuthFailureHandler() { super("/failure"); }}

上面整个登录流程的组件就完成了，接下来需要将它们整合起来。

整合登录组件

具体怎么整合，我们可以参考表单登录中，UsernamePasswordAuthenticationFilter是怎么整合进去的，回到配置类，还记得我们是怎么配置Security的吗：

@Configurationpublic class SecurityConfig extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.formLogin() .loginPage("/login") //登录页面 .successForwardUrl("/index") //登录成功后的页面 .failureForwardUrl("/failure") //登录失败后的页面 .and() // 设置URL的授权 .authorizeRequests() // 这里需要将登录页面放行 .antMatchers("/login") .permitAll() //除了上面，其他所有请求必须被认证 .anyRequest() .authenticated() .and() // 关闭csrf .csrf().disable(); }}

分析表单登录实现

看第一句，调用了http.formLogin()，在HttpSecurity的formLogin方法定义如下：

public FormLoginConfigurer<HttpSecurity> formLogin() throws Exception { return getOrApply(new FormLoginConfigurer<>());}private <C extends SecurityConfigurerAdapter<DefaultSecurityFilterChain, HttpSecurity>> C getOrApply(C configurer) throws Exception { //注意这个configure为SecurityConfigurerAdapter C existingConfig = (C) getConfigurer(configurer.getClass()); if (existingConfig != null) { return existingConfig; } return apply(configurer);}

apply方法为AbstractConfiguredSecurityBuilder中的方法，我们目前先不关注它的实现，后面会仔细展开讲。现在只需要知道通过这个方法就能将configurer加入到security配置中。

这个地方添加了一个FormLoginConfigurer类，对于这个类官方给的解释为：

Adds form based authentication. All attributes have reasonable defaults making all parameters are optional. If no {@link #loginPage(String)} is specified, a default login page will be generated by the framework.

翻译过来就是：

添加基于表单的身份验证。所有属性都有合理的默认值，从而使所有参数都是可选的。如果未指定loginPage，则框架将生成一个默认的登录页面。

看一下它的构造方法：

public FormLoginConfigurer() { super(new UsernamePasswordAuthenticationFilter(), null); usernameParameter("username"); passwordParameter("password");}

发现UsernamePasswordAuthenticationFilter被传递给了父类，我们去它的父类AbstractAuthenticationFilterConfigurer看一下：

public abstract class AbstractAuthenticationFilterConfigurer<B extends HttpSecurityBuilder<B>, T extends AbstractAuthenticationFilterConfigurer<B, T, F>, F extends AbstractAuthenticationProcessingFilter> extends AbstractHttpConfigurer<T, B> { protected AbstractAuthenticationFilterConfigurer(F authenticationFilter, String defaultLoginProcessingUrl) { this(); //这个filter就是UsernamePasswordAuthenticationFilter this.authFilter = authenticationFilter; if (defaultLoginProcessingUrl != null) { loginProcessingUrl(defaultLoginProcessingUrl); } } @Override public void configure(B http) throws Exception { PortMapper portMapper = http.getSharedObject(PortMapper.class); if (portMapper != null) { this.authenticationEntryPoint.setPortMapper(portMapper); } RequestCache requestCache = http.getSharedObject(RequestCache.class); if (requestCache != null) { this.defaultSuccessHandler.setRequestCache(requestCache); } //通过getSharedObject获取共享对象。这里获取到AuthenticationManager this.authFilter.setAuthenticationManager(http.getSharedObject(AuthenticationManager.class)); //设置成功和失败的回调 this.authFilter.setAuthenticationSuccessHandler(this.successHandler); this.authFilter.setAuthenticationFailureHandler(this.failureHandler); if (this.authenticationDetailsSource != null) { this.authFilter.setAuthenticationDetailsSource(this.authenticationDetailsSource); } SessionAuthenticationStrategy sessionAuthenticationStrategy = http .getSharedObject(SessionAuthenticationStrategy.class); if (sessionAuthenticationStrategy != null) { this.authFilter.setSessionAuthenticationStrategy(sessionAuthenticationStrategy); } RememberMeServices rememberMeServices = http.getSharedObject(RememberMeServices.class); if (rememberMeServices != null) { this.authFilter.setRememberMeServices(rememberMeServices); } F filter = postProcess(this.authFilter); //添加filter http.addFilter(filter); }}

可以看到这个地方主要做了三件事：

• 将AuthenticationManager设置到filter中
• 添加成功/失败的回调
• 将过滤器添加到过滤器链中

仿照表单登录，实现配置类

仿照上面的三个步骤，我们可以自己实现一个配置类，查看AbstractAuthenticationFilterConfigurer的类继承关系：

它最上面的顶级父类为SecurityConfigurerAdapter，我们就继承它来实现我们基本的配置就行了（也可以继承AbstractHttpConfigurer，没有歧视的意思），并且实现上面的三步：

@Componentpublic class SmsAuthenticationSecurityConfig extends SecurityConfigurerAdapter<DefaultSecurityFilterChain, HttpSecurity> { @Autowired private SmsAuthSuccessHandler smsAuthSuccessHandler; @Autowired private SmsAuthFailureHandler smsAuthFailureHandler; @Autowired private SmsAuthenticationProvider smsAuthenticationProvider; @Override public void configure(HttpSecurity builder) throws Exception { SmsAuthenticationFilter smsAuthenticationFilter = new SmsAuthenticationFilter(); smsAuthenticationFilter.setAuthenticationManager(builder.getSharedObject(AuthenticationManager.class)); smsAuthenticationFilter.setAuthenticationSuccessHandler(smsAuthSuccessHandler); smsAuthenticationFilter.setAuthenticationFailureHandler(smsAuthFailureHandler); builder.authenticationProvider(smsAuthenticationProvider); builder.addFilterAfter(smsAuthenticationFilter, UsernamePasswordAuthenticationFilter.class); }}

和上面有一点不同，我们自定义的filter需要指定一下顺序，通过addFilterAfter方法将我们的filter添加到过滤器链中，并且将自定义的provider也一并配置了进来。

添加配置到security中

这样我们的所有组件就已经组合到一起了，修改一下配置类：

@Autowiredprivate SmsAuthenticationSecurityConfig smsAuthenticationSecurityConfig;@Overrideprotected void configure(HttpSecurity http) throws Exception { http.formLogin() .loginPage("/login") .and() .apply(smsAuthenticationSecurityConfig) .and() // 设置URL的授权 .authorizeRequests() // 这里需要将登录页面放行 .antMatchers("/login","/verifyCode","/smsLogin","/failure") .permitAll() // anyRequest() 所有请求 authenticated() 必须被认证 .anyRequest() .authenticated() .and() // 关闭csrf .csrf().disable();}

再修改一下登录页面的登录接口和字段名：

<!DOCTYPE html><html lang="zh"><head> <meta charset="UTF-8"> <title>login</title></head><body> <form action="/smsLogin" method="post"> <input type="text" name="phone"/> <input type="password" name="verifyCode"/> <input type="submit" value="提交"/> </form></body></html>

这样通过短信验证码登录的功能就已经实现了。

建议大家可以自己重新实现一个自定义邮箱验证码登录，加深映像。

源码分析

configurer配置类工作原理

上面只是简单的使用，接下来我们分析configure是如何工作的。

大家注意自己要打开idea跟着过一遍源码

其实通过上面的配置我们可以发现，在security中的过滤器其实都是通过各种xxxConfigure来进行配置的，我们可以简单的理解为filter就是和配置类绑定在一起的。明白了这个概念，我们继续往下分析。
看上面AbstractAuthenticationFilterConfigurer的类继承关系图，从最上面开始分析，SecurityBuilder和SecurityConfigurer都是接口：

public interface SecurityBuilder<O> { /** * 构建一个对象并返回 */ O build() throws Exception;}public interface SecurityConfigurer<O, B extends SecurityBuilder<O>> { /** * 初始化 */ void init(B builder) throws Exception; void configure(B builder) throws Exception;}

SecurityConfigurerAdapter分析

上面两个接口的具体实现交给了SecurityConfigurerAdapter，在spring security中很多配置类都是继承自SecurityConfigurerAdapter来实现的。看一下实现类SecurityConfigurerAdapter的源码：

public abstract class SecurityConfigurerAdapter<O, B extends SecurityBuilder<O>> implements SecurityConfigurer<O, B> { private B securityBuilder; private CompositeObjectPostProcessor objectPostProcessor = new CompositeObjectPostProcessor(); @Override public void init(B builder) throws Exception { } @Override public void configure(B builder) throws Exception { } /** * 返回SecurityBuilder，这样就可以进行链式调用了 */ public B and() { return getBuilder(); } /** * 获取到SecurityBuilder */ protected final B getBuilder() { Assert.state(this.securityBuilder != null, "securityBuilder cannot be null"); return this.securityBuilder; } /** * 执行对象的后置处理。默认值为委派给ObjectPostProcessor完成 * @return 可使用的已修改对象 */ @SuppressWarnings("unchecked") protected <T> T postProcess(T object) { return (T) this.objectPostProcessor.postProcess(object); } public void addObjectPostProcessor(ObjectPostProcessor<?> objectPostProcessor) { this.objectPostProcessor.addObjectPostProcessor(objectPostProcessor); } public void setBuilder(B builder) { this.securityBuilder = builder; } /** * ObjectPostProcessor的一个实现 */ private static final class CompositeObjectPostProcessor implements ObjectPostProcessor<Object> { private List<ObjectPostProcessor<?>> postProcessors = new ArrayList<>(); @Override @SuppressWarnings({ "rawtypes", "unchecked" }) public Object postProcess(Object object) { //执行后置处理器的postProcess方法 for (ObjectPostProcessor opp : this.postProcessors) { Class<?> oppClass = opp.getClass(); Class<?> oppType = GenericTypeResolver.resolveTypeArgument(oppClass, ObjectPostProcessor.class); if (oppType == null || oppType.isAssignableFrom(object.getClass())) { object = opp.postProcess(object); } } return object; } //在list中添加了一个后置处理器 private boolean addObjectPostProcessor(ObjectPostProcessor<?> objectPostProcessor) { boolean result = this.postProcessors.add(objectPostProcessor); this.postProcessors.sort(AnnotationAwareOrderComparator.INSTANCE); return result; } }}

嗯。。。这两个方法都是空实现，应该是交给后面的子类去自己重写方法。多出来的内容就只是初始化了CompositeObjectPostProcessor，并基于它封装了两个方法。

CompositeObjectPostProcessor是ObjectPostProcessor的一个实现，ObjectPostProcessor实际上是一个后置处理器。
其次addObjectPostProcessor方法实际上就是在list中添加了一个后置处理器并排序。然后在postProcess方法中对这个list遍历，判断ObjectPostProcessor泛型类型和传过来的参数类型是否为父子关系，再次调用postProcess方法。

这个地方可能有点疑惑，为什么要再调用一次postProcess，这不就成递归了吗，我们注意一下CompositeObjectPostProcessor类是private的，也就是只能在SecurityConfigurerAdapter内部使用，这里再次调用postProcess方法应该是其他的ObjectPostProcessor的实现。

可以看一下ObjectPostProcessor总共有两个实现，另外还有一个是AutowireBeanFactoryObjectPostProcessor：

final class AutowireBeanFactoryObjectPostProcessor implements ObjectPostProcessor<Object>, DisposableBean, SmartInitializingSingleton { private final Log logger = LogFactory.getLog(getClass()); private final AutowireCapableBeanFactory autowireBeanFactory; private final List<DisposableBean> disposableBeans = new ArrayList<>(); private final List<SmartInitializingSingleton> smartSingletons = new ArrayList<>(); AutowireBeanFactoryObjectPostProcessor(AutowireCapableBeanFactory autowireBeanFactory) { Assert.notNull(autowireBeanFactory, "autowireBeanFactory cannot be null"); this.autowireBeanFactory = autowireBeanFactory; } @Override @SuppressWarnings("unchecked") public <T> T postProcess(T object) { if (object == null) { return null; } T result = null; try { result = (T) this.autowireBeanFactory.initializeBean(object, object.toString()); } catch (RuntimeException ex) { Class<?> type = object.getClass(); throw new RuntimeException("Could not postProcess " + object + " of type " + type, ex); } this.autowireBeanFactory.autowireBean(object); if (result instanceof DisposableBean) { this.disposableBeans.add((DisposableBean) result); } if (result instanceof SmartInitializingSingleton) { this.smartSingletons.add((SmartInitializingSingleton) result); } return result; } @Override public void afterSingletonsInstantiated() { for (SmartInitializingSingleton singleton : this.smartSingletons) { singleton.afterSingletonsInstantiated(); } } @Override public void destroy() { for (DisposableBean disposable : this.disposableBeans) { try { disposable.destroy(); } catch (Exception ex) { this.logger.error(ex); } } }}

这里面主要是通过autowireBeanFactory将对象注入到容器当中，在security中，很多对象都是new出来的，这些new出来的对象和容器没有任何关联，也不方便管理，所以通过AutowireBeanFactoryObjectPostProcessor来完成对象的注入。

也就是说，在SecurityConfigurerAdapter中定义的这两个方法，其实就是将对象放进spring容器当中，方便管理。

AbstractConfiguredSecurityBuilder分析

SecurityConfigurerAdapter的内容就这么多了，继续往下看AbstractHttpConfigurer：

public abstract class AbstractHttpConfigurer<T extends AbstractHttpConfigurer<T, B>, B extends HttpSecurityBuilder<B>> extends SecurityConfigurerAdapter<DefaultSecurityFilterChain, B> { @SuppressWarnings("unchecked") public B disable() { getBuilder().removeConfigurer(getClass()); return getBuilder(); } @SuppressWarnings("unchecked") public T withObjectPostProcessor(ObjectPostProcessor<?> objectPostProcessor) { addObjectPostProcessor(objectPostProcessor); return (T) this; }}

代码很少，第二个方法就是调用SecurityConfigurerAdapter的方法，这里主要看第一个disable方法，我们在配置类中就已经使用过了， 在禁用csrf的时候调用了 csrf().disable()，就是通过这个方法，将csrf的配置移除了。

继续看disable方法是调用了AbstractConfiguredSecurityBuilder中的removeConfigurer方法，实际上就是移除LinkedHashMap中的一个元素：

private final LinkedHashMap<Class<? extends SecurityConfigurer<O, B>>, List<SecurityConfigurer<O, B>>> configurers = new LinkedHashMap<>();public <C extends SecurityConfigurer<O, B>> List<C> removeConfigurers(Class<C> clazz) { List<C> configs = (List<C>) this.configurers.remove(clazz); if (configs == null) { return new ArrayList<>(); } return new ArrayList<>(configs); }

既然有移除的方法，那肯定就有添加的方法：

private final List<SecurityConfigurer<O, B>> configurersAddedInInitializing = new ArrayList<>();private final Map<Class<?>, Object> sharedObjects = new HashMap<>();@SuppressWarnings("unchecked")private <C extends SecurityConfigurer<O, B>> void add(C configurer) { Assert.notNull(configurer, "configurer cannot be null"); Class<? extends SecurityConfigurer<O, B>> clazz = (Class<? extends SecurityConfigurer<O, B>>) configurer .getClass(); synchronized (this.configurers) { if (this.buildState.isConfigured()) { throw new IllegalStateException("Cannot apply " + configurer + " to already built object"); } List<SecurityConfigurer<O, B>> configs = null; if (this.allowConfigurersOfSameType) { configs = this.configurers.get(clazz); } configs = (configs != null) ? configs : new ArrayList<>(1); configs.add(configurer); this.configurers.put(clazz, configs); if (this.buildState.isInitializing()) { this.configurersAddedInInitializing.add(configurer); } }}

我们自定义短信登录的时候，在配置类中添加自定义配置： .apply(smsAuthenticationSecurityConfig)，这个apply方法实际上就是调用上面的方法，将配置添加了进去。

既然配置都添加到这个容器当中了，那什么时候取出来用呢：

private Collection<SecurityConfigurer<O, B>> getConfigurers() { List<SecurityConfigurer<O, B>> result = new ArrayList<>(); for (List<SecurityConfigurer<O, B>> configs : this.configurers.values()) { result.addAll(configs); } return result;}//执行所有configurer的初始化方法private void init() throws Exception { Collection<SecurityConfigurer<O, B>> configurers = getConfigurers(); for (SecurityConfigurer<O, B> configurer : configurers) { configurer.init((B) this); } for (SecurityConfigurer<O, B> configurer : this.configurersAddedInInitializing) { configurer.init((B) this); }}//获取到所有的configure，遍历执行configure方法private void configure() throws Exception { //从LinkedHashMap中获取到configurer Collection<SecurityConfigurer<O, B>> configurers = getConfigurers(); for (SecurityConfigurer<O, B> configurer : configurers) { configurer.configure((B) this); }}

在init和configure方法中，调用了配置类的configure方法，到这里其实整个流程就已经通了。

我们一般自定义登录，都会实现这个configure方法，在这个方法里初始化一个filter，然后加入到过滤器链中。
而这个类的init和configure方法，实际上是在调用SecurityBuilder 的build方法被调用的，具体的代码链路就不说了，大家感兴趣的可以自己去看一下。

最后贴一下AbstractConfiguredSecurityBuilder的所有代码(已精简)：

public abstract class AbstractConfiguredSecurityBuilder<O, B extends SecurityBuilder<O>> extends AbstractSecurityBuilder<O> { private final LinkedHashMap<Class<? extends SecurityConfigurer<O, B>>, List<SecurityConfigurer<O, B>>> configurers = new LinkedHashMap<>(); private final List<SecurityConfigurer<O, B>> configurersAddedInInitializing = new ArrayList<>(); private final Map<Class<?>, Object> sharedObjects = new HashMap<>(); private final boolean allowConfigurersOfSameType; private ObjectPostProcessor<Object> objectPostProcessor; @SuppressWarnings("unchecked") public <C extends SecurityConfigurerAdapter<O, B>> C apply(C configurer) throws Exception { configurer.addObjectPostProcessor(this.objectPostProcessor); configurer.setBuilder((B) this); add(configurer); return configurer; } public <C extends SecurityConfigurer<O, B>> C apply(C configurer) throws Exception { add(configurer); return configurer; } @SuppressWarnings("unchecked") public <C> void setSharedObject(Class<C> sharedType, C object) { this.sharedObjects.put(sharedType, object); } @SuppressWarnings("unchecked") public <C> C getSharedObject(Class<C> sharedType) { return (C) this.sharedObjects.get(sharedType); } /** * Gets the shared objects * @return the shared Objects */ public Map<Class<?>, Object> getSharedObjects() { return Collections.unmodifiableMap(this.sharedObjects); } @SuppressWarnings("unchecked") private <C extends SecurityConfigurer<O, B>> void add(C configurer) { Assert.notNull(configurer, "configurer cannot be null"); Class<? extends SecurityConfigurer<O, B>> clazz = (Class<? extends SecurityConfigurer<O, B>>) configurer .getClass(); synchronized (this.configurers) { if (this.buildState.isConfigured()) { throw new IllegalStateException("Cannot apply " + configurer + " to already built object"); } List<SecurityConfigurer<O, B>> configs = null; if (this.allowConfigurersOfSameType) { configs = this.configurers.get(clazz); } configs = (configs != null) ? configs : new ArrayList<>(1); configs.add(configurer); this.configurers.put(clazz, configs); if (this.buildState.isInitializing()) { this.configurersAddedInInitializing.add(configurer); } } } /** * 通过class name移除相关的配置类 */ @SuppressWarnings("unchecked") public <C extends SecurityConfigurer<O, B>> List<C> removeConfigurers(Class<C> clazz) { List<C> configs = (List<C>) this.configurers.remove(clazz); if (configs == null) { return new ArrayList<>(); } return new ArrayList<>(configs); } /** * 通过class name移除相关的配置类 */ @SuppressWarnings("unchecked") public <C extends SecurityConfigurer<O, B>> C removeConfigurer(Class<C> clazz) { List<SecurityConfigurer<O, B>> configs = this.configurers.remove(clazz); if (configs == null) { return null; } Assert.state(configs.size() == 1, () -> "Only one configurer expected for type " + clazz + ", but got " + configs); return (C) configs.get(0); } @SuppressWarnings("unchecked") public B objectPostProcessor(ObjectPostProcessor<Object> objectPostProcessor) { Assert.notNull(objectPostProcessor, "objectPostProcessor cannot be null"); this.objectPostProcessor = objectPostProcessor; return (B) this; } protected <P> P postProcess(P object) { return this.objectPostProcessor.postProcess(object); } //执行所有configurer的初始化方法 private void init() throws Exception { Collection<SecurityConfigurer<O, B>> configurers = getConfigurers(); for (SecurityConfigurer<O, B> configurer : configurers) { configurer.init((B) this); } for (SecurityConfigurer<O, B> configurer : this.configurersAddedInInitializing) { configurer.init((B) this); } } //获取到所有的configure，遍历执行configure方法 private void configure() throws Exception { //从LinkedHashMap中获取到configurer Collection<SecurityConfigurer<O, B>> configurers = getConfigurers(); for (SecurityConfigurer<O, B> configurer : configurers) { configurer.configure((B) this); } } //执行钩子函数和configure方法 protected final O doBuild() throws Exception { synchronized (this.configurers) { this.buildState = BuildState.INITIALIZING; beforeInit(); init(); this.buildState = BuildState.CONFIGURING; beforeConfigure(); configure(); this.buildState = BuildState.BUILDING; O result = performBuild(); this.buildState = BuildState.BUILT; return result; } }}

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