gateway报错信息：
Spring MVC found on classpath, which is incompatible with Spring Cloud Gateway at this time. Please remove spring-boot-starter-web dependency.

解决方法：
产生问题原因：Gateway 不支持spring boot web包
找到pom文件，把spring-boot-starter-web删除即可
删除以下两个依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>

然后刷新maven，再次启动就不报错了