springmvc 和Spring Cloud Gateway的冲突问题

Question

启动项目时出现了

Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway at this time. Please remove spring-boot-starter-web dependency.
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'redisRateLimiter' defined in class path resource [org/springframework/cloud/gateway/config/GatewayRedisAutoConfiguration.class]: Unsatisfied dependency expressed through method 'redisRateLimiter' parameter 2; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'gatewayConfigurationService' defined in class path resource [org/springframework/cloud/gateway/config/GatewayAutoConfiguration.class]: Unsatisfied dependency expressed through method 'gatewayConfigurationService' parameter 1; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.core.convert.ConversionService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Qualifier(value=webFluxConversionService)}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:799) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:540) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1176) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:897) ~[spring-beans-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.12.RELEASE.jar:2.2.12.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.12.RELEASE.jar:2.2.12.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:405) [spring-boot-2.2.12.RELEASE.jar:2.2.12.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.12.RELEASE.jar:2.2.12.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.12.RELEASE.jar:2.2.12.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.12.RELEASE.jar:2.2.12.RELEASE]
    at www.coderdesigner.top.ServerGatewayApplication.main(ServerGatewayApplication.java:13) [classes/:na]
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'gatewayConfigurationService' defined in class path resource [org/springframework/cloud/gateway/config/GatewayAutoConfiguration.class]: Unsatisfied dependency expressed through method 'gatewayConfigurationService' parameter 1; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.core.convert.ConversionService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Qualifier(value=webFluxConversionService)}

大致的意识是springmvc 和spring cloud gate way中的依赖相冲突，无法创建bean，导致spring容器启动失败

原因是我在：common_util 和service_utl 中引入了spring-boot-start-web 依赖
pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>hospital_parent</artifactId>
        <groupId>www.coderdesigner.top</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>service_gateway</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>

        <!-- 服务注册 -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        <dependency>
            <groupId>www.coderdesigner.top</groupId>
            <artifactId>common_util</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>

        <dependency>
            <groupId>www.coderdesigner.top</groupId>
            <artifactId>service_util</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
    </dependencies>

</project>

但是我在网关中使用了filter 并且为了统一返回格式，引入了含有spring-boot-start-web 的模块

package www.coderdesigner.top.filter;

import com.alibaba.fastjson.JSONObject;
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.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
import www.coderdesigner.commmon.helper.JwtHelper;
import www.coderdesigner.commmon.result.Result;
import www.coderdesigner.commmon.result.ResultCodeEnum;

import java.nio.charset.StandardCharsets;
import java.util.List;

/**
 * <p>
 * 全局Filter，统一处理会员登录与外部不允许访问的服务
 * </p>
 *
 * @author qy
 * @since 2019-11-21
 */
@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {

    private AntPathMatcher antPathMatcher = new AntPathMatcher();

    /**
     * 重写过滤方法,设置过滤规则;
     * @param exchange
     * @param chain
     * @return
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //获取request
        ServerHttpRequest request = exchange.getRequest();

        //获取访问路径
        String path = request.getURI().getPath();
        System.out.println("==="+path);

        //内部服务接口，不允许外部访问
        if(antPathMatcher.match("/**/inner/**", path)) {
            ServerHttpResponse response = exchange.getResponse();
            return out(response, ResultCodeEnum.PERMISSION);
        }

        Long userId = this.getUserId(request);
        //api接口，异步请求，校验用户必须登录
        if(antPathMatcher.match("/api/**/auth/**", path)) {
            if(StringUtils.isEmpty(userId)) {
                ServerHttpResponse response = exchange.getResponse();
                return out(response, ResultCodeEnum.LOGIN_AUTH);
            }
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }

    /**
     * api接口鉴权失败返回数据
     * @param response
     * @return
     */
    private Mono<Void> out(ServerHttpResponse response, ResultCodeEnum resultCodeEnum) {
        Result result = Result.build(null, resultCodeEnum);
        byte[] bits = JSONObject.toJSONString(result).getBytes(StandardCharsets.UTF_8);
        DataBuffer buffer = response.bufferFactory().wrap(bits);
        //指定编码，否则在浏览器中会中文乱码
        response.getHeaders().add("Content-Type", "application/json;charset=UTF-8");
        return response.writeWith(Mono.just(buffer));
    }

    /**
     * 获取当前登录用户id
     * @param request
     * @return
     */
    private Long getUserId(ServerHttpRequest request) {
        String token = "";
        List<String> tokenList = request.getHeaders().get("token");
        if(null  != tokenList) {
            token = tokenList.get(0);
        }
        if(!StringUtils.isEmpty(token)) {
            return JwtHelper.getUserId(token);
        }
        return null;
    }
}

请问我该如何解决这个问题 ?

Answer 1

Spring Cloud Gateway底层是基于reactive响应式编程的，依赖了webflux（spring-boot-starter-webflux），webflux跟webmvc功能一样，所以这两个冲突。
没看出你用webmvc干啥了。反正webmvc能干的，webflux也能干。就是用法不太一样。