SpringBoot项目搭建路由模块-gateway_qq_2423338532_springboot 路由

网络投稿 02-07 1857

网关主要功能：限流（流量控制）；重试（请求失败时重试，慎用）；跨域（前后端不在同一个域）；路由（转发请求）；鉴权（登录校验，签名校验）等。

新建Maven子项目gateway

加入网关依赖

<dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-gateway</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> </dependencies>

加启动类和配置文件

package com.dog.gateway; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.core.env.Environment; @SpringBootApplication @EnableEurekaClient public class GatewayApplication { private static final Logger LOG = LoggerFactory.getLogger(GatewayApplication.class); public static void main(String[] args) { SpringApplication app = new SpringApplication(GatewayApplication.class); Environment env = app.run(args).getEnvironment(); LOG.info("启动成功！！"); LOG.info("Gateway地址: \thttp://192.168.0.51:{}", env.getProperty("server.port")); } }

因为这是个路由，是比较重要又跟业务不相关的模块，所以就定义路由端口是9000。其他的业务模块是从9001, 9002这么排下去的。

spring.application.name=gateway server.port=9000 eureka.client.service-url.defaultZone=http://localhost:8761/eureka/

<?xml version="1.0" encoding="UTF-8"?> <configuration>  <property name="PATH" value="/log/dog/gateway"></property> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder>  <Pattern>%d{mm:ss.SSS} %highlight(%-5level) %blue(%-30logger{30}:%-4line) %msg%n</Pattern> </encoder> </appender> <appender name="TRACE_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${PATH}/trace.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>${PATH}/trace.%d{yyyy-MM-dd}.%i.log</FileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>10MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> </rollingPolicy> <layout> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %-50logger{50}:%-4line %green(%-8X{UUID}) %msg%n</pattern> </layout> </appender> <appender name="ERROR_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <file>${PATH}/error.log</file> <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"> <FileNamePattern>${PATH}/error.%d{yyyy-MM-dd}.%i.log</FileNamePattern> <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP"> <maxFileSize>10MB</maxFileSize> </timeBasedFileNamingAndTriggeringPolicy> </rollingPolicy> <layout> <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level %-50logger{50}:%-4line %green(%-8X{UUID}) %msg%n</pattern> </layout> <filter class="ch.qos.logback.classic.filter.LevelFilter"> <level>ERROR</level> <onMatch>ACCEPT</onMatch> <onMismatch>DENY</onMismatch> </filter> </appender> <root level="ERROR"> <appender-ref ref="ERROR_FILE" /> </root> <root level="TRACE"> <appender-ref ref="TRACE_FILE" /> </root> <root level="INFO"> <appender-ref ref="STDOUT" /> </root> </configuration>

gateway启动失败，检查版本号注意：如果你发现路由gateway启动报错如下：

*************************** 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:612) The following method did not exist: ......

检查下Spring Boot和Spring Cloud版本是否匹配，建议和本项目的保持一致，修改根目录下的父pom.xml

<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.2.RELEASE</version> <relativePath/>  </parent> ... <properties> <java.version>1.8</java.version> <spring-cloud.version>Hoxton.RELEASE</spring-cloud.version> </properties>

启动注册中心和网关

路由转发

路由转发：将外部请求转发到实际的业务模块进行处理。启动system测试一下要在system的Controller里加上system这个路径。可以这样但是以后有多个方法的时候每个都要加system会很麻烦也可以这样但是以后有多个类的时候每个都要加system会很麻烦所以要这样(必须 / 开头，而且不能 / 结尾) 都重新启动一下这个时候就可以了目的：将9001地址对外隐藏，暴露9000地址，访问的是localhost:9000/system/**.实际处理的是：localhost:9001/system/**