Spring Security（二）--WebSecurityConfigurer配置以及filter顺序

 protected void configure(AuthenticationManagerBuilder auth) throws Exception {}
 public void configure(WebSecurity web) throws Exception {}
 protected void configure(HttpSecurity httpSecurity) throws Exception {}

//1.init初始化：获取HttpSecurity和配置FilterSecurityInterceptor拦截器到WebSecurity
 public void init(final WebSecurity web) throws Exception {
         //获取HttpSecurity
   final HttpSecurity http = getHttp();
    //配置FilterSecurityInterceptor拦截器到WebSecurity
    web.addSecurityFilterChainBuilder(http).postBuildAction(new Runnable() {
        public void run() {
            FilterSecurityInterceptor securityInterceptor = http
                    .getSharedObject(FilterSecurityInterceptor.class);
            web.securityInterceptor(securityInterceptor);
        }
    });
}
......
//2.获取HttpSecurity的过程
protected final HttpSecurity getHttp() throws Exception {
if (http != null) {
    return http;
}
?
DefaultAuthenticationEventPublisher eventPublisher = objectPostProcessor
        .postProcess(new DefaultAuthenticationEventPublisher());
localConfigureAuthenticationBldr.authenticationEventPublisher(eventPublisher);
?
AuthenticationManager authenticationManager = authenticationManager();
authenticationBuilder.parentAuthenticationManager(authenticationManager);
Map<Class<? extends Object>, Object> sharedObjects = createSharedObjects();
?
http = new HttpSecurity(objectPostProcessor, authenticationBuilder,
        sharedObjects);
if (!disableDefaults) {
    // 默认的HttpSecurity的配置
    http
                //添加 CSRF 支持，使用WebSecurityConfigurerAdapter时，默认启用，禁用csrf().disable()
        .csrf().and() 
        //添加WebAsyncManagerIntegrationFilter
        .addFilter(new WebAsyncManagerIntegrationFilter())
        //允许配置异常处理
        .exceptionHandling().and()
        //将安全标头添加到响应
        .headers().and()
        //允许配置会话管理
        .sessionManagement().and()
        //HttpServletRequest之间的SecurityContextHolder创建securityContext管理
        .securityContext().and()
        //允许配置请求缓存
        .requestCache().and()
        //允许配置匿名用户
        .anonymous().and()
        //HttpServletRequestd的方法和属性注册在SecurityContext中
        .servletApi().and()
        //使用默认登录页面
        .apply(new DefaultLoginPageConfigurer<>()).and()
        //提供注销支持
        .logout();
    // @formatter:on
    ClassLoader classLoader = this.context.getClassLoader();
    List<AbstractHttpConfigurer> defaultHttpConfigurers =
            SpringFactoriesLoader.loadFactories(AbstractHttpConfigurer.class, classLoader);
?
    for(AbstractHttpConfigurer configurer : defaultHttpConfigurers) {
        http.apply(configurer);
    }
}
configure(http);
return http;
}
...
//3.可重写方法实现自定义的

HttpSecurity protected void configure(HttpSecurity http) throws Exception {

logger.debug("Using default configure(HttpSecurity).If subclassed this will potentially override subclass configure(HttpSecurity).");

http
    .authorizeRequests()
        .anyRequest().authenticated()
        .and()
    .formLogin().and()
    .httpBasic();
}
....   

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
 @Autowired
 private MyFilterSecurityInterceptor myFilterSecurityInterceptor;
 protected void configure(HttpSecurity http) throws Exception {    
     http
     //request 设置
     .authorizeRequests()   //http.authorizeRequests() 方法中的自定义匹配
     .antMatchers("/resources/**", "/signup", "/about").permitAll() // 指定所有用户进行访问指定的url          
     .antMatchers("/admin/**").hasRole("ADMIN")  //指定具有特定权限的用户才能访问特定目录，hasRole()方法指定用户权限，且不需前缀 “ROLE_“  
     .antMatchers("/db/**").access("hasRole(‘ADMIN‘) and hasRole(‘DBA‘)")//          
     .anyRequest().authenticated()  //任何请求没匹配的都需要进行验证                                           
     .and()        //login设置  自定义登录页面且允许所有用户登录
     .formLogin()      
     .loginPage("/login") //The updated configuration specifies the location of the log in page  指定自定义登录页面
     .permitAll(); // 允许所有用户访问登录页面. The formLogin().permitAll() 方法
     .and 
     .logout()  //logouts 设置                                                              
     .logoutUrl("/my/logout")  // 指定注销路径                                              
     .logoutSuccessUrl("/my/index") //指定成功注销后跳转到指定的页面                                        
     .logoutSuccessHandler(logoutSuccessHandler)  //指定成功注销后处理类 如果使用了logoutSuccessHandler()的话， logoutSuccessUrl()就会失效                                
     .invalidateHttpSession(true)  // httpSession是否有效时间，如果使用了 SecurityContextLogoutHandler，其将被覆盖                                        
     .addLogoutHandler(logoutHandler)  //在最后增加默认的注销处理类LogoutHandler                
     .deleteCookies(cookieNamesToClear);//指定注销成功后remove cookies
     //增加在FilterSecurityInterceptor前添加自定义的myFilterSecurityInterceptor
     http.addFilterBefore(myFilterSecurityInterceptor, FilterSecurityInterceptor.class);
   }