原 org.springframework.http.codec.ServerCodecConfigurer that could not be found

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一：springcloud alibaba 集成gateway我们需要引入

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

二：报错信息如下

Parameter 0 of method modifyRequestBodyGatewayFilterFactory in org.springframework.cloud.gateway.config.GatewayAutoConfiguration required a bean of type 'org.springframework.http.codec.ServerCodecConfigurer' that could not be found.

三：错误原因：因为spring-cloud-starter-gateway用的是webflux里面已经包含了spring-boot-starter-web，解决办法：在spring-cloud-starter-gateway里面将spring-boot-starter-web排除掉，如下所示

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </exclusion>
     </exclusions>
</dependency>