SpringCloud搭建微服务之Gateway+Jwt实现统一鉴权

以下是一个简化的Spring Cloud Gateway配合JWT实现鉴权的示例：

1. 添加依赖（pom.xml）：

<dependencies>
    <!-- Spring Cloud Gateway -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
    </dependency>
    <!-- Spring Cloud Gateway Filter for JWT -->
    <dependency>
        <groupId>com.marcosbarbero.cloud</groupId>
        <artifactId>spring-cloud-gateway-core-filter-jwt-rewrite</artifactId>
        <version>2.2.1.RELEASE</version>
    </dependency>
    <!-- JWT -->
    <dependency>
        <groupId>io.jsonwebtoken</groupId>
        <artifactId>jjwt</artifactId>
        <version>0.9.1</version>
    </dependency>
</dependencies>

2. 配置文件（application.yml）：

spring:
  cloud:
    gateway:
      routes:
        - id: service-id
          uri: http://localhost:8080
          predicates:
            - Path=/service/**
          filters:
            - StripPrefix=1
            - name: JwtRequestWrapperFilter
            - name: JwtDecodeFilter
              args:
                public-key: "your_public_key"
                token-is-optional: false

3. 配置JWT过滤器（FilterConfig.java）：

@Configuration
public class FilterConfig {
 
    @Bean
    public JwtFilter jwtFilter() {
        return new JwtFilter("your_public_key");
    }
}

4. JWT过滤器实现（JwtFilter.java）：

public class JwtFilter implements GatewayFilter, Ordered {
    private String publicKey;
 
    public JwtFilter(String publicKey) {
        this.publicKey = publicKey;
    }
 
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        String token = exchange.getRequest().getHeaders().getFi