1.pom依赖

注意问题：

    1.srpingboot的版本与springcloud版本需要对应，不然会出现问题

    2.不要引入springmvc的包

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

     3.由于maven最近不稳定推荐使用阿里的镜像

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>yyhouc</artifactId>
        <groupId>com.yyhouc</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>
    <artifactId>yyhouc_getway</artifactId>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-gateway</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
    </dependencies>

</project>

父模块POM

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yyhouc</groupId>
    <artifactId>yyhouc</artifactId>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>yyhouc_getway</module>
    </modules>
    <packaging>pom</packaging>
    <name>yyhouc</name>
    <description>父工程</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/>
    </parent>
    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR3</spring-cloud.version>
    </properties>
    <dependencyManagement>
        <dependencies>
            <!--  Spring Cloud Alibaba 依赖  -->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.0.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <repositories>
        <repository>
            <id>nexus-aliyun</id>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </repository>
    </repositories>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2.编写启动类

注意添加@EnableDiscoveryClient注解

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@EnableDiscoveryClient
@SpringBootApplication
public class GetwayApplication {

    public static void main(String[] args) {
        SpringApplication.run(GetwayApplication.class, args);
    }

}

3.配置文件

注意yml配置文件对于下划线识别不是很好，不推荐在服务名称中添加下划线，推荐使用驼峰或者其他方式实现，

在这里我掉坑里很长时间，检查了无数遍配置，最后把下划线去掉成功，直接成功。

server:
  port: 10086
spring:
  application:
    name: yyhouc_getway
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
      password: nacos
      username: nacos
    gateway:
      routes:
        - id: yyhoucServer
          uri: lb://yyhoucServer
          predicates:
            - Path=/yyhouc/**
          filters:
            - StripPrefix=1
      discovery:
        locator:
          enabled: true  
          lower-case-service-id: true
logging:
  level:
    root: debug