【shiro】登录经历的流程（执行ShiroAccountRealm doGetAuthenticationInfo经历的过程）

http://jinnianshilongnian.iteye.com/blog/2025656 拦截器机制。

在这里
@Bean(name = "shiroFilter")
public ShiroFilterFactoryBean getShiroFilter() {
　　ShiroFilterFactoryBean shiroFilterFactoryBean = new ShiroFilterFactoryBean();
　　shiroFilterFactoryBean.setSecurityManager(getDefaultWebSecurityManager());
　　shiroFilterFactoryBean.setLoginUrl("/login");
　　shiroFilterFactoryBean.setSuccessUrl("/index");
　　Map<String, Filter> filters = new HashMap<>();
　　filters.put("authc", getFormAuthenticationCaptchaFilter()); //******************************//
　　filters.put("logout", getLogoutFilter());
　　shiroFilterFactoryBean.setFilters(filters);
　　shiroFilterFactoryBean.setFilterChainDefinitionMap(getFilterChainDefinitionMap());
　　return shiroFilterFactoryBean;
}
private Map<String, String> getFilterChainDefinitionMap() {
　　Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
　　filterChainDefinitionMap.put("/login", "authc"); //******************************//
　　filterChainDefinitionMap.put("/logout", "logout");
　　filterChainDefinitionMap.put("/druid", "anon");
　　filterChainDefinitionMap.put("/olv3", "anon");
　　filterChainDefinitionMap.put("/*", "anon");
　　return filterChainDefinitionMap;
}

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FormAuthenticationCaptchaFilter
继承自 FormAuthenticationFilter
继承自 AuthenticatingFilter
继承自 AuthenticationFilter
继承自 AccessControlFilter

isAccessAllowed和onAccessDenied是AccessControlFilter的方法
【-A-】调用 FormAuthenticationFilter onAccessDenied 方法
return executeLogin(request, response);

【-B-】调用 AuthenticatingFilter executeLogin 方法
AuthenticationToken token = createToken(request, response);
Subject subject = getSubject(request, response);
subject.login(token);

【-C-】Subject是一个接口
实际调用DelegatingSubject的login方法
Subject subject = securityManager.login(this, token);

【-D-】SecurityManager是一个接口
实际调用DefaultSecurityManager的login方法
AuthenticationInfo info;
info = authenticate(token);

【-E-】调用 AuthenticatingSecurityManager 的authenticate方法
return调用Authenticator接口的authenticate方法，
实际调用AbstractAuthenticator类的authenticate方法，
AuthenticationInfo info;
info = doAuthenticate(token);

【-F-】调用ModularRealmAuthenticator的doAuthenticate方法，
调用assertRealmsConfigured();
Collection<Realm> realms = getRealms();
if (realms.size() == 1) {
　　return doSingleRealmAuthentication(realms.iterator().next(), authenticationToken);
} else {
　　return doMultiRealmAuthentication(realms, authenticationToken);
}

【-G-】调用doSingleRealmAuthentication(Realm realm, AuthenticationToken token)
AuthenticationInfo info = realm.getAuthenticationInfo(token);

【-H-】调用Realm接口的getAuthenticationInfo(token)方法
实际调用AuthenticatingRealm的getAuthenticationInfo(token)方法
AuthenticationInfo info = getCachedAuthenticationInfo(token);
if (info == null) {
//otherwise not cached, perform the lookup:
info = doGetAuthenticationInfo(token);

【-I-】调用ShiroAccountRealm的doGetAuthenticationInfo(token)方法
而此方法是自己写的！！！
AuthenticationInfo authcInfo = new SimpleAuthenticationInfo(username, user.getPassword(), this.getName());
返回authcInfo 继续再往上返回。