SpringCloud Zuul实现动态路由

 <!-- Zuul -->
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
    </dependency>

server.port=10010
spring.application.name=zuul-server
eureka.client.serviceUrl.defaultZone=http://localhost:1111/eureka/
#健康检查（需要spring-boot-starter-actuator依赖）
eureka.client.healthcheck.enabled=true
# 续约更新时间间隔（默认30秒）
eureka.instance.lease-renewal-interval-in-seconds=10
# 续约到期时间（默认90秒）
eureka.instance.lease-expiration-duration-in-seconds=10

#zuul代理配置 zuul.routes.服务名.path,服务名要与注册的一致
#应用名映射
zuul.routes.myspringboot.path=/myspringboot/**
zuul.routes.myspringboot.service-id=myspringboot

#URL映射
#zuul.routes.myspringboot.path=/myspringboot/**
#zuul.routes.myspringboot-url.url=http://localhost:10087/

/**
 * Zuul过滤器，实现了路由检查
 */
public class AccessFilter extends ZuulFilter {

  /**
   * 通过int值来定义过滤器的执行顺序
   */
  @Override
  public int filterOrder() {
    // PreDecoration之前运行
    return PRE_DECORATION_FILTER_ORDER - 1;
  }

  /**
   * 过滤器的类型，在zuul中定义了四种不同生命周期的过滤器类型：
   *   public static final String ERROR_TYPE = "error";
   *   public static final String POST_TYPE = "post";
   *   public static final String PRE_TYPE = "pre";
   *   public static final String ROUTE_TYPE = "route";
   */
  @Override
  public String filterType() {
    return PRE_TYPE;
  }

  /**
   * 过滤器的具体逻辑
   */
  @Override
  public Object run() {
    RequestContext ctx = RequestContext.getCurrentContext();
    HttpServletRequest request = ctx.getRequest();
    System.out.println(String.format("%s AccessFilter request to %s", request.getMethod(),request.getRequestURL().toString()));
    String accessToken = request.getParameter("accessToken");
    //有权限令牌
    if (!StringUtils.isEmpty(accessToken)) {
      ctx.setSendZuulResponse(true);
      ctx.setResponseStatusCode(200);
      //可以设置一些值
      ctx.set("isSuccess", true);
      return null;
    } else {
      ctx.setSendZuulResponse(false);
      ctx.setResponseStatusCode(401);
      ctx.setResponseBody("{\"result\":\"accessToken is not correct!\"}");
      //可以设置一些值
      ctx.set("isSuccess", false);
      return null;
    }
  }

  /**
   * 返回一个boolean类型来判断该过滤器是否要执行
   */
  @Override
  public boolean shouldFilter() {
    return true;
  }
}

@EnableZuulProxy
@SpringBootApplication
public class ZuulServerApplication {

  public static void main(String[] args) {
    SpringApplication.run(ZuulServerApplication.class, args);
  }

  @Bean
  public AccessFilter accessFilter() {
    return new AccessFilter();
  }
}