将 Spring Security 与 Spring Gateway 结合使用时出现“无法访问 javax.servlet.Filter”错误

我将 Spring Gateway 和 Spring Security 放在一起，因为我想保护我的网关。但是在实现以下类扩展之后WebSecurityConfigurerAdapter，该项目抛出

java：无法访问javax.servlet.Filter

@Configuration
@EnableWebSecurity
public class SecurityConfigurer extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        InMemoryUserDetailsManager userDetails = new InMemoryUserDetailsManager();
        UserDetails user = User.withUsername("foo").password(passwordEncoder().encode("bar")).build();
        
        userDetails.createUser(user);
        auth.userDetailsService(userDetails).passwordEncoder(passwordEncoder());
    }
    
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.httpBasic();
        http.authorizeRequests().anyRequest().authenticated();
    }
    
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder(8);
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
        <relativePath/>
    </parent>
    <groupId>com.gabriel</groupId>
    <artifactId>gateway-service</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>gateway-service</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>16</java.version>
        <spring-cloud.version>2020.0.2</spring-cloud.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
            <version>3.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>3.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

从 Spring Cloud 网关文档:

Spring Cloud Gateway 需要 Spring Boot 和 Spring Webflux 提供的 Netty 运行时。它在传统的 Servlet 容器中或作为 WAR 构建时不起作用。

延伸WebSecurityConfigurerAdapter适用于基于 servlet 的应用程序。

你应该配置用于反应式应用程序的 Spring Security.

@Configuration
@EnableWebFluxSecurity
public class HelloWebfluxSecurityConfig {

    @Bean
    public MapReactiveUserDetailsService userDetailsService() {
        UserDetails user = User.withUsername("foo").password(passwordEncoder().encode("bar")).build();

        return new MapReactiveUserDetailsService(user);
    }

    @Bean
    public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http) {
        http
            .authorizeExchange(exchanges -> exchanges
                .anyExchange().authenticated()
            )
            .httpBasic(withDefaults());
        return http.build();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder(8);
    }
}