我的spring security应用程序中的多个登录页有问题。
我读过很多关于如何配置多个登录页面的文章，例如，为spring启动应用程序中的多个登录页面配置Spring Security
最后，我可以调用两个不同的登录窗体以两种方式继续登录-分别针对具有不同角色的用户。
问题是第二个登录表单不起作用。两个登录页都被正确调用，但只有一个正常工作。在我提交第二个登录表单后，响应是405：

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sun Jan 31 21:35:51 UTC 2021
There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'POST' not supported
org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'POST' not supported

我的securityconfig类如下所示：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Bean
    public PasswordEncoder encoder() {
        return new BCryptPasswordEncoder();
    }

    @Configuration
    @Order(1)
    public static class UserConfigurationAdapter extends WebSecurityConfigurerAdapter {

        private final DataSource dataSource;
        private final UserDetailsService userDetailsService;

        public UserConfigurationAdapter(DataSource dataSource, UserDetailsService userDetailsService) {
            this.dataSource = dataSource;
            this.userDetailsService = userDetailsService;
        }

        public PasswordEncoder encoder() {
            return new BCryptPasswordEncoder();
        }

        @Override
        protected void configure(AuthenticationManagerBuilder auth) throws Exception {
            auth
                    .jdbcAuthentication()
                    .dataSource(dataSource)
                    .usersByUsernameQuery(
                            "SELECT email, password, enabled FROM users WHERE email=?"
                    )
                    .authoritiesByUsernameQuery(
                            "SELECT email, authority FROM authorities WHERE email=?"
                    )
                    .passwordEncoder(encoder())
            ;
            auth
                    .userDetailsService(userDetailsService)
                    .passwordEncoder(encoder());
        }

        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http
                    .authorizeRequests()
                    .antMatchers("/", "register/**")
                    .permitAll()
                    .antMatchers("/user/**")
                    .hasRole("USER")

                    .and()
                    .formLogin()
                    .loginPage("/login")
                    .usernameParameter("email")
                    .defaultSuccessUrl("/user/my-donations")

                    .and()
                    .logout()
                    .logoutRequestMatcher(new AntPathRequestMatcher("/logout", "GET"))
                    .logoutSuccessUrl("/")

                    .and()
                    .csrf().disable();
        }

    }

    @Configuration
    @Order(2)
    public static class AdminConfigurationAdapter extends WebSecurityConfigurerAdapter {

        private final DataSource dataSource;
        private final UserDetailsService userDetailsService;

        public AdminConfigurationAdapter(DataSource dataSource, UserDetailsService userDetailsService) {
            this.dataSource = dataSource;
            this.userDetailsService = userDetailsService;
        }

        public PasswordEncoder encoder() {
            return new BCryptPasswordEncoder();
        }

        @Override
        protected void configure(AuthenticationManagerBuilder auth) throws Exception {
            auth
                    .jdbcAuthentication()
                    .dataSource(dataSource)
                    .usersByUsernameQuery(
                            "SELECT email, password, enabled FROM users WHERE email=?"
                    )
                    .authoritiesByUsernameQuery(
                            "SELECT email, authority FROM authorities WHERE email=?"
                    )
                    .passwordEncoder(encoder())
            ;
            auth
                    .userDetailsService(userDetailsService)
                    .passwordEncoder(encoder());
        }

        @Override
        protected void configure(HttpSecurity http) throws Exception {
            http
                    .authorizeRequests()
                    .antMatchers("/admin/login")
                    .permitAll()
                    .antMatchers("/admin/**")
                    .hasRole("ADMIN")

                    .and()
                    .formLogin()
                    .loginPage("/admin/login")
                    .usernameParameter("email")
                    .defaultSuccessUrl("/admin/dashboard", true)

                    .and()
                    .logout()
                    .logoutRequestMatcher(new AntPathRequestMatcher("/admin/logout", "GET"))
                    .logoutSuccessUrl("/")

                    .and()
                    .csrf().disable();
        }

    }

}

在上面的一个例子中 /login 很好，但是 /admin/login 不是。如果我换一个 @Order 就像下面的情况一样- /admin/login 正在工作并且 /login 表格提交后返回405：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    // ...

    @Configuration
    @Order(2)
    public static class UserConfigurationAdapter extends WebSecurityConfigurerAdapter {
        // ...

    }

    @Configuration
    @Order(1)
    public static class AdminConfigurationAdapter extends WebSecurityConfigurerAdapter {
            // .. 

    }

}

当然，还配置了视图解析器。我试过这样做：https://www.yawintutor.com/multiple-login-pages-using-spring-boot-security-with-database-authentication/ 或者使用 requestMatcher() 如以下文章所示：springboot和springsecurity多个登录页面
但总是第一个登录表单工作，第二个响应405。