关于Correct the classpath of your application so that it contains a single, compatible versi

报错提示有重复的包，查看报错的内容，对应的模块，删除提示的包即可成功运行Eureka

或者改为Test

**

以上两种方法都只是暂时的，当重新引入pom文件依赖的时候又会重新报错，根本解决方法：

自己导入2.4版本的servlet-api

 <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.4</version>
        </dependency>

**
或者重新配置
配置Eureka的时候出错，出现Correct the classpath of your application so that it contains a single, compatible version of …
大致是

中出了问题

使用spring-boot-starter-parent

 <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

spring-boot-starter-parent里面 已经定义好了很多版本号，如果我们引入自己的parent里面的pom配置，jar包的版本号可能发生冲突。

然后再配置springboot和eurkea
    springboot2.0以下的用 spring-cloud-starter-eureka-server
         2.0以上的用spring-cloud-starter-netflix-eureka-server
总配置：

<?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">

    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.RC2</spring-cloud.version>
    </properties>

    <artifactId>springcloud-erueka-7001</artifactId>

    <dependencies>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
        </dependency>

</dependencies>



</project>

即可运行成功Eureka

---

2.3.2.RELEASE 对应的2.2.3.RELEASE Eureka的配置

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>groupId</groupId>
    <artifactId>leetcode_collection</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <version>2.3.2.RELEASE</version>
        <artifactId>spring-boot-starter-parent</artifactId>
    </parent>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>8</source>
                    <target>8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>


    <dependencies>

        <!-- eureka 服务注册中心 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
            <version>2.2.3.RELEASE</version>
        </dependency>

        <!-- spring-cloud-dependencies  -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>2021.0.0</version>
            <type>pom</type>
            <scope>runtime</scope>
        </dependency>

    </dependencies>
</project>