《springcloud 二》SrpingCloud Zuul 微服务网关搭建

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>
    <!-- 管理依赖 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.M7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
    </dependencies>
    <!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

###注册 中心
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8100/eureka/
server:
  port: 80
###网关名称
spring:
  application:
    name: service-zuul
### 配置网关反向代理    
zuul:
  routes:
    api-a:
     ### 以 /api-member/访问转发到会员服务
      path: /api-member/**
      serviceId: app-itmayiedu-member
    api-b:
        ### 以 /api-order/访问转发到订单服务
      path: /api-order/**
      serviceId: app-itmayiedu-order

@Component
public class TokenFilter extends ZuulFilter {

    public Object run() throws ZuulException {
        // 获取上下文
        RequestContext currentContext = RequestContext.getCurrentContext();
        HttpServletRequest request = currentContext.getRequest();
        String userToken = request.getParameter("userToken");
        if (StringUtils.isEmpty(userToken)) {
            currentContext.setSendZuulResponse(false);
            currentContext.setResponseStatusCode(401);
            currentContext.setResponseBody("userToken is null");
            return null;
        }
        // 否则正常执行业务逻辑.....
        return null;
    }

    // 判断过滤器是否生效
    public boolean shouldFilter() {

        return true;
    }

    // 过滤器的执行顺序。当请求在一个阶段的时候存在多个多个过滤器时，需要根据该方法的返回值依次执行
    public int filterOrder() {

        return 0;
    }

    // 过滤器类型 pre 表示在 请求之前进行拦截
    public String filterType() {

        return "pre";
    }

}