项目中，使用gateway作为统一的网关入口，进行token的校验后，会将token解析后的userId和phone等信息放到request的请求头中，到fegin后，需要进行拦截后发送给下游服务。

1.使用的fegin依赖
 <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-openfeign</artifactId>
     <version>2.1.5.RELEASE</version>
 </dependency>
  <dependency>
     <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-dependencies</artifactId>
      <version>Greenwich.SR5</version>
      <type>pom</type>
      <scope>import</scope>
  </dependency>
2.gateway中拦截token并解析的代码

统一的拦截类：

import cn.hutool.core.collection.CollectionUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.fastjson.JSONObject;
import com.ruizhi.detection.common.TokenReturnEnum;
import com.ruizhi.detection.common.TokenUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;

/**
 * @description: 公共的权限过滤filter
 * @Author: 
 * @Date: 2019/8/15 13:43
 */
@Component
public class ApiGlobalFilter implements GlobalFilter, Ordered {

    /**
     * 不进行token校验的地址
     */
    @Value("#{'${jwt.ignoreUrlList}'.split(',')}")
    public List<String> ignoreUrl;

    @Autowired
    private TokenUtil tokenUtil;

    /**
     * 拦截所有的请求头
     * @param exchange
     * @param chain
     * @return
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        String requestUrl = exchange.getRequest().getPath().toString();
        boolean status = CollectionUtil.contains(ignoreUrl, requestUrl);
        if (!status){
            String token = exchange.getRequest().getHeaders().getFirst("token");
            ServerHttpResponse response = exchange.getResponse();
            //没有数据
            if (StrUtil.isBlank(token)) {
                JSONObject message = new JSONObject();
                message.put("code", TokenReturnEnum.TOKEN_NONE.getCode());
                message.put("message", "鉴权失败，无token或手机号");
                byte[] bits = message.toString().getBytes(StandardCharsets.UTF_8);
                DataBuffer buffer = response.bufferFactory().wrap(bits);
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                response.getHeaders().add("Content-Type", "text/json;charset=UTF-8");
                return response.writeWith(Mono.just(buffer));
                //有数据
            }else {
                //校验token
                Map<String, String> tokenInfoMap = tokenUtil.verifyJWT(token);
                if (tokenUtil.TOKEN_ERROR.equals(tokenInfoMap.get("code"))){
                    JSONObject message = new JSONObject();
                    message.put("message", "token错误");
                    message.put("code", TokenReturnEnum.TOKEN_ERROR.getCode());
                    byte[] bits = message.toString().getBytes(StandardCharsets.UTF_8);
                    DataBuffer buffer = response.bufferFactory().wrap(bits);
                    response.setStatusCode(HttpStatus.UNAUTHORIZED);
                    response.getHeaders().add("Content-Type", "text/json;charset=UTF-8");
                    return response.writeWith(Mono.just(buffer));
                }else if (tokenUtil.TOKEN_EXPIRED.equals(tokenInfoMap.get("code"))){
                    JSONObject message = new JSONObject();
                    message.put("message", "token过期");
                    message.put("code", TokenReturnEnum.TOKEN_TIME_OUT.getCode());
                    byte[] bits = message.toString().getBytes(StandardCharsets.UTF_8);
                    DataBuffer buffer = response.bufferFactory().wrap(bits);
                    response.setStatusCode(HttpStatus.UNAUTHORIZED);
                    response.getHeaders().add("Content-Type", "text/json;charset=UTF-8");
                    return response.writeWith(Mono.just(buffer));
                }
                //将数据返回给下级服务器
                Consumer<HttpHeaders> httpHeaders = httpHeader -> {
                    httpHeader.set("phone", tokenInfoMap.get("phone"));
                    httpHeader.set("targetId", tokenInfoMap.get("targetId"));
                    httpHeader.set("type", tokenInfoMap.get("type"));
                    httpHeader.set("scope", tokenInfoMap.get("scope"));
                };
                //将现在的request，添加当前身份
                ServerHttpRequest mutableReq = exchange.getRequest().mutate().headers(httpHeaders).build();
                ServerWebExchange mutableExchange = exchange.mutate().request(mutableReq).build();
                return chain.filter(mutableExchange);
            }
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 10101;
    }
}

tokenUtil代码：

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.TokenExpiredException;
import com.auth0.jwt.interfaces.DecodedJWT;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import java.util.HashMap;
import java.util.Map;

/**
 * @description: 解析token信息的工具类
 * @Author: yang.fu.ren
 * @Date: 2020/2/20 9:34
 */
@Component
public class TokenUtil {

    private static Map<String, String> map = new HashMap<>();

    /**
     * token校验通过
     */
    public final String TOKEN_CORRECT = "TOKEN_CORRECT";
    /**
     * token错误
     */
    public final String TOKEN_ERROR = "TOKEN_ERROR";
    /**
     * token过期
     */
    public final String TOKEN_EXPIRED = "TOKEN_EXPIRED";

    @Value("${jwt.secret}")
    private String secret;

    /**
     * 校验token
     * @param token
     * @return
     */
    public Map<String, String> verifyJWT(String token){
        Algorithm algorithm = Algorithm.HMAC256(secret);
        JWTVerifier verifier = JWT.require(algorithm)
                .withIssuer("admin")
                .build();
        try {
            DecodedJWT jwt = verifier.verify(token);
            String phone = jwt.getClaim("phone").asString();
            String targetId = jwt.getClaim("targetId").asString();
            String type = jwt.getClaim("type").asString();
            String scope = jwt.getClaim("scope").asString();
            map.put("phone", phone);
            map.put("targetId", targetId);
            map.put("type", type);
            map.put("scope", scope);
            map.put("code", TOKEN_CORRECT);
        }catch (TokenExpiredException e){
            map.put("code", TOKEN_EXPIRED);
        }catch (Exception e){
            map.put("code", TOKEN_ERROR);
        }finally {
            return map;
        }
    }
}
3.在fegin中拦截请求头并添加的代码
import feign.RequestInterceptor;
import feign.RequestTemplate;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;

/**
 * @description拦截请求并重新设置header信息
 * @author
 * @date 2020/3/23 10:09
 */
@Slf4j
@Configuration
public class FeignRequestInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        String phone = request.getHeader("phone");
        String userAgent = request.getHeader("User-agent");
        String contentType = request.getHeader("Content-Type");
        template.header("Content-Type", new String[]{contentType});
        template.header("User-agent", new String[]{userAgent});
        template.header("phone", new String[]{phone});
        System.out.println(phone + "ddd" + userAgent + "dddd" + contentType);
    }
}
4.下游服务获取请求头数据的代码
 //从头中获取当前的登录id
 HttpServletRequest request = ((ServletRequestAttributes) (RequestContextHolder.currentRequestAttributes())).getRequest();
 System.out.println("获取到的头部信息:" + request.getHeader("phone"));

坑：

这里必须说一个我遇到的坑，找了好久没有找到原因，具体内容是，在fegin中拦截请求头并添加的时候，RequestInterceptor的代码如下：

@Configuration
public class FeignRequestInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();
        Enumeration<String> headerNames = request.getHeaderNames();
        if (headerNames != null) {
            while (headerNames.hasMoreElements()) {
                String name = headerNames.nextElement();
                String values = request.getHeader(name);
                template.header(name, values);
                System.out.println("name:" + name + ";value" + values);
            }
        }
    }
}

这个代码看起来逻辑好像也都没啥错误，就是把所有的请求头都加入到接下来的Request中，但是这样在你进行post请求时就会报以下的错误，而且错误是，当返回结果时候，会出错，猜测的是这个把所有的请求头都给加到reques里了，返回错误。

2020-03-23 15:47:18.437 ERROR 7268 --- [nio-9105-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is feign.RetryableException: Incomplete output stream executing POST http://standard-service/standardInfo/pageStandardInfo] with root cause

java.io.IOException: Incomplete output stream
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1523) ~[na:1.8.0_211]
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1492) ~[na:1.8.0_211]
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480) ~[na:1.8.0_211]
	at feign.Client$Default.convertResponse(Client.java:82) ~[feign-core-10.4.0.jar:na]
	at feign.Client$Default.execute(Client.java:78) ~[feign-core-10.4.0.jar:na]
	at org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.execute(FeignLoadBalancer.java:93) ~[spring-cloud-openfeign-core-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at org.springframework.cloud.openfeign.ribbon.FeignLoadBalancer.execute(FeignLoadBalancer.java:56) ~[spring-cloud-openfeign-core-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at com.netflix.client.AbstractLoadBalancerAwareClient$1.call(AbstractLoadBalancerAwareClient.java:104) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:303) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$3$1.call(LoadBalancerCommand.java:287) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
	at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:231) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.util.ScalarSynchronousObservable$3.call(ScalarSynchronousObservable.java:228) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.drain(OnSubscribeConcatMap.java:286) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeConcatMap$ConcatMapSubscriber.onNext(OnSubscribeConcatMap.java:144) ~[rxjava-1.3.8.jar:1.3.8]
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:185) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
	at com.netflix.loadbalancer.reactive.LoadBalancerCommand$1.call(LoadBalancerCommand.java:180) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
	at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:94) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeConcatMap.call(OnSubscribeConcatMap.java:42) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.Observable.unsafeSubscribe(Observable.java:10327) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber$1.call(OperatorRetryWithPredicate.java:127) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.enqueue(TrampolineScheduler.java:73) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.schedulers.TrampolineScheduler$InnerCurrentThreadScheduler.schedule(TrampolineScheduler.java:52) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:79) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OperatorRetryWithPredicate$SourceSubscriber.onNext(OperatorRetryWithPredicate.java:45) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.util.ScalarSynchronousObservable$WeakSingleProducer.request(ScalarSynchronousObservable.java:276) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.Subscriber.setProducer(Subscriber.java:209) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:138) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.util.ScalarSynchronousObservable$JustOnSubscribe.call(ScalarSynchronousObservable.java:129) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.Observable.subscribe(Observable.java:10423) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.Observable.subscribe(Observable.java:10390) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.observables.BlockingObservable.blockForSingle(BlockingObservable.java:443) ~[rxjava-1.3.8.jar:1.3.8]
	at rx.observables.BlockingObservable.single(BlockingObservable.java:340) ~[rxjava-1.3.8.jar:1.3.8]
	at com.netflix.client.AbstractLoadBalancerAwareClient.executeWithLoadBalancer(AbstractLoadBalancerAwareClient.java:112) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0]
	at org.springframework.cloud.openfeign.ribbon.LoadBalancerFeignClient.execute(LoadBalancerFeignClient.java:83) ~[spring-cloud-openfeign-core-2.1.5.RELEASE.jar:2.1.5.RELEASE]
	at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:110) ~[feign-core-10.4.0.jar:na]
	at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:80) ~[feign-core-10.4.0.jar:na]
	at com.alibaba.cloud.sentinel.feign.SentinelInvocationHandler.invoke(SentinelInvocationHandler.java:107) ~[spring-cloud-alibaba-sentinel-2.1.1.RELEASE.jar:2.1.1.RELEASE]
	at com.sun.proxy.$Proxy106.pageStandardInfo(Unknown Source) ~[na:na]
	at com.ruizhi.detection.controller.standad.StandardInfoController.pageStandardInfo(StandardInfoController.java:63) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:893) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:798) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:94) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.1.13.RELEASE.jar:5.1.13.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at com.alibaba.csp.sentinel.adapter.servlet.CommonFilter.doFilter(CommonFilter.java:110) ~[sentinel-web-servlet-1.7.0.jar:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1598) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_211]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.30.jar:9.0.30]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211]

网上各种找，只有一种答案，说是什么fegin中的请求用的是原生的HttpURLConnection，需要用Apache HttpClient，因为openfegin引入的其他包都比较多，替换后，就会出现包冲突的问题。这个真的是困扰了我好久，都一度怀疑是版本问题了。最后是想着只传一个参数，就一个个接然后传，结果就好了。。。

# java # spring boot
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