springboot集成springCloud中gateway時啟動報錯的解決方法

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在項目中引入springcloud中的gateway時報以下錯誤

Description:

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.

Action:
Consider defining a bean of type 'org.springframework.http.codec.ServerCodecConfigurer' in your configuration.

這個是由于依賴沖突，spring-cloud-starter-gateway與spring-boot-starter-web和spring-boot-starter-webflux依賴沖突

解決方式：

在引入gateway時過濾掉上面兩個依賴

 <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>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-webflux</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

springboot整合gateway啟動失敗

問題：

springboot整合gateway啟動失敗

***************************
APPLICATION FAILED TO START
***************************
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:622)
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:/C:/Users/Administrator/.m2/repository/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:/C:/Users/Administrator/.m2/repository/io/projectreactor/netty/reactor-netty/0.9.1.RELEASE/reactor-netty-0.9.1.RELEASE.jar
Action:
Correct the classpath of your application so that it contains a single, compatible version of reactor.netty.resources.ConnectionProvider
Disconnected from the target VM, address: '127.0.0.1:55875', transport: 'socket'
Process finished with exit code 1

這塊主要是版本兼容的問題，

最初用的版本是：

<dependency>
            <groupId>io.projectreactor.netty</groupId>
            <artifactId>reactor-netty</artifactId>
            <version>0.9.4.RELEASE</version>
        </dependency>

網上有的是需要把這個版本降低，我這是降低了也不行

最后升高了版本改成了：

<dependency>
            <groupId>io.projectreactor.netty</groupId>
            <artifactId>reactor-netty</artifactId>
            <version>0.9.14.RELEASE</version>
        </dependency>

本項目里springboot版本為：2.3.1，根據自己項目需要吧，看一下自己項目中各個版本之間的問題

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