本篇内容主要讲解“如何解决升级boot后gateway网关出现的大量问题”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“如何解决升级boot后gateway网关出现的大量问题”吧!

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项目版本

报错1：

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

org.springframework.cloud.gateway.config.GatewayAutoConfiguration$NettyConfiguration.gatewayHttpClient(GatewayAutoConfiguration.java:612)

The following method did not exist:

reactor.netty.resources.ConnectionProvider.elastic(Ljava/lang/String;Ljava/time/Duration;Ljava/time/Duration;)Lreactor/netty/resources/ConnectionProvider;

The method's class, reactor.netty.resources.ConnectionProvider, is available from the following locations:

jar:file:/E:/java/MAVEN/MavenRepo/io/projectreactor/netty/reactor-netty/0.9.1.RELEASE/reactor-netty-0.9.1.RELEASE.jar!/reactor/netty/resources/ConnectionProvider.class

It was loaded from the following location:

file:/E:/java/MAVEN/MavenRepo/io/projectreactor/netty/reactor-netty/0.9.1.RELEASE/reactor-netty-0.9.1.RELEASE.jar

这个错误原因是因为boot升级到2.2.X以后对应的cloud版本虽然是H版本，但是gateway版本的netty却对应不上了。所以需要单独引入netty版本

解决

错误2Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

org.springframework.cloud.gateway.config.GatewayAutoConfiguration$NettyConfiguration.reactorNettyWebSocketClient(GatewayAutoConfiguration.java:738)

The following method did not exist:

org.springframework.web.reactive.socket.client.ReactorNettyWebSocketClient.setHandlePing(Z)V

The method's class, org.springframework.web.reactive.socket.client.ReactorNettyWebSocketClient, is available from the following locations:

jar:file:/E:/java/MAVEN/MavenRepo/org/springframework/spring-webflux/5.2.1.RELEASE/spring-webflux-5.2.1.RELEASE.jar!/org/springframework/web/reactive/socket/client/ReactorNettyWebSocketClient.class

It was loaded from the following location:

file:/E:/java/MAVEN/MavenRepo/org/springframework/spring-webflux/5.2.1.RELEASE/spring-webflux-5.2.1.RELEASE.jar

这个错误原因也是一样，都是版本匹配问题，内部的自动配置类找不到对应的版本依赖，需要单独引入spring-webflux的版本，注意要引入高版本进行向下兼容，否则5.2.1依旧会产生错误

解决排除掉gateway网关内的webflux，引入一个新的webflux 因为spring cloud gateway是基于webflux的，如果非要web支持的话需要导入spring-boot-starter-webflux而不是spring-boot-start-web。

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