SpringCloud Zuul基于Consul配置及详解

        <!--SpringBoot2.0以上版本需引入该依赖-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-consul-discovery</artifactId>
        </dependency>

@SpringBootApplication
@EnableDiscoveryClient
@EnableZuulProxy
@RestController
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

}

zuul.routes.api-a.path=/api-a/**
zuul.routes.api-a.service-id=api-a

zuul.routes.api-b.path=/api-b/**
zuul.routes.api-b.service-id=api-b

public class MyGatewayFilter extends ZuulFilter {

　　/*4种过滤器类型, 
　　pre：可以在请求被路由之前调用, 
　　route：在路由请求时候被调用, 

　　post：在route和error过滤器之后被调用, 
　　error：处理请求时发生错误时被调用*/ 

　　@Override 
　　public String filterType() { 
　　　　return "pre";
　　}

    @Override
    public int filterOrder() {
        return 0;　　//优先级为0，数字越大，优先级越低
    }

    @Override
    public boolean shouldFilter() {
        return true;　　// 是否执行该过滤器，此处为true，说明需要过滤
    }

    @Override
    public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();

        log.info(String.format("%s request to %s", request.getMethod(), request.getRequestURL().toString()));

        Object accessToken = request.getParameter("token");　　//获取token参数
        if (accessToken == null) {
            log.warn("token is empty");
            ctx.setSendZuulResponse(false);　　//过滤该请求, 不对其进行路由
            ctx.setResponseStatusCode(401);　　//返回错误码
            ctx.setResponseBody("token is null!");　　//返回错误内容
            return null;　　　//Zuul还未对返回数据做处理
        }
　　　　return null;
    }
}        

@SpringBootApplication
@EnableDiscoveryClient
@EnableZuulProxy
@RestController
public class LixjApplication {

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

    @Bean
    public MyGatewayFilter myGatewayFilter(){
        return new MyGatewayFilter();
    }
}

　　　　zuul.routes.api-a.path=/api-a/**
　　　　zuul.routes.api-a.service-id=api-a

　　　　zuul.routes.api-a-part.path=/api-a/part/**
　　　　zuul.routes.api-a-part.service-id=api-a-part

zuul:
    routes:
        api-a-part:
            path=/api-a/part/**
            service-id=api-a-part　
        api-a:
            path=/api-a/**
            service-id=api-a        

zuul.routes.api-c.path=/api-c/**
zuul.routes.api-c.url=forward:/api-c