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springcloud gateway 映射失效的解决方案

转载 作者:qq735679552 更新时间:2022-09-29 22:32:09 32 4
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网关

解决的问题:

  1. 自动路由,反向代理,负载均衡鉴权、监控
  2. 使用spring cloud gateway

路由匹配predicate 并到达指定位置 。

springcloud gateway 映射失效的解决方案

请求过来通过handler mapping来判断是否可以处理,能处理通过handler去处理,处理前经过一系列filter 。

gateway配置

  • id代表某一条规则
  • uri代表目的地
  • predicate代表路由规则,解析请求头、请求方法、请求时间、请求路径等请求参数才可路由到uri的目的地
  • filter代表过滤器,可在请求过程中额外添加参数

使用:

1、添加依赖 。

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

2、添加路由配置 。

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spring:
   cloud:
     gateway:
       routes:
         - id: query_route # 规则id
           uri: https: //baidu.com # 目的地址
           predicates:
             - Query=url, baidu # 断言匹配,满足就跳转到目的地址
         - id: qq_test
           uri: https: //qq.com
           predicates:
             - Query=url, qq

3、具体路由参考官方文档 。

踩坑:chrome 默认会把url失败后转为https开头,而一般本地请求都是http 导致请求出错 。

springcloud的gateway报以下错误

原因:

springcloud的版本和springboot的版本对应不上,可能因为springboot版本过低或者springcloud版本过高,去springcloud官网查看对应springboot版本重新依赖即可解决 。

报错版本:

springcloud:Greenwich.SR5 springboot:2.1.4 。

调整后版本:

springcloud:Greenwich.SR5 springboot:2.1.8(如果springboot版本大于等于2.2.0还是会报错) 。

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java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.gateway.config.GatewayAutoConfiguration$NettyConfiguration] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader @7b1d7fff ]
     at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java: 507 ) ~[spring-core- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java: 404 ) ~[spring-core- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java: 389 ) ~[spring-core- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java: 447 ) ~[spring-core- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java: 1705 ) ~[na:na]
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java: 738 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java: 679 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java: 647 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java: 1518 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java: 507 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java: 477 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java: 598 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java: 590 ) ~[spring-beans- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java: 1226 ) ~[spring-context- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java: 905 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java: 891 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java: 877 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java: 826 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at org.springframework.boot.SpringApplication.run(SpringApplication.java: 327 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at org.springframework.boot.SpringApplication.run(SpringApplication.java: 1260 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at org.springframework.boot.SpringApplication.run(SpringApplication.java: 1248 ) ~[spring-boot- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
     at com.changgou.GatewayWebApplication.main(GatewayWebApplication.java: 15 ) ~[classes/:na]
     at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
     at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java: 62 ) ~[na:na]
     at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: 43 ) ~[na:na]
     at java.base/java.lang.reflect.Method.invoke(Method.java: 566 ) ~[na:na]
     at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java: 49 ) ~[spring-boot-devtools- 2.1 . 4 .RELEASE.jar: 2.1 . 4 .RELEASE]
Caused by: java.lang.NoClassDefFoundError: reactor/netty/http/client/HttpResponseDecoderSpec
     at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
     at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java: 3167 ) ~[na:na]
     at java.base/java.lang.Class.getDeclaredMethods(Class.java: 2310 ) ~[na:na]
     at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java: 489 ) ~[spring-core- 5.1 . 6 .RELEASE.jar: 5.1 . 6 .RELEASE]
     ... 26 common frames omitted
Caused by: java.lang.ClassNotFoundException: reactor.netty.http.client.HttpResponseDecoderSpec
     at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java: 583 ) ~[na:na]
     at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java: 178 ) ~[na:na]
     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java: 521 ) ~[na:na]
     ... 30 common frames omitted
 
Process finished with exit code 0

以上为个人经验,希望能给大家一个参考,也希望大家多多支持我.

原文链接:https://blog.csdn.net/wangzibai/article/details/114791044 。

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