Gateway和spring-boot-starter-web冲突问题
SpringCloud 版本 ---- Finchley.SR2
SpringBoot 版本 ---- 2.0.6.RELEASE
引入gateway 依赖启动网关子项目报错
<dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-gateway</artifactId></dependency>启动网关报错
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-12-31 10:26:35.211 ERROR 13124 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
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APPLICATION FAILED TO START
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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.
Process finished with exit code 1问题分析：
gateway构建与Spring 5+，基于Spring boot 2.x响应式的、非阻塞式的API，同时，他支持webSockets和spring框架紧密集成
报错原因：启动时默认使用了spring-boot-starter-web的内置容器，不支持非阻塞
问题解决:
有两种解决方法：
1、排除web内置容器
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><!-- Maven整个生命周期内排除内置容器，排除内置容器导出成war包可以让外部容器运行spring-boot项目--><exclusions><exclusion><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId></exclusion></exclusions></dependency>2、使用spring-webflux模块，webflux有一个全新的非阻塞的函数式Reactive Web框架，可以用来构建异步的、非阻塞的事件驱动服务
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-webflux</artifactId></dependency>