java.lang.ClassNotFoundException: com.netflix.discovery.EurekaClientConfig

Question

我使用Spring并使用Spring (http://start.spring.io/)创建项目。生成的POM用户Eureka Finchley.RC2和Spring 2.0.2 generated 。当我在主类中添加注释@EnableEurekaServer时，也使用@SpringBootApplication注释的注释，并使用以下命令启动服务器：

mvn spring-boot:run

我收到例外情况

java.lang.ClassNotFoundException: com.netflix.discovery.EurekaClientConfig

以下是Initializr生成的pom.xml：

<?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>it.javaboss</groupId>
<artifactId>api-gateway</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>api-gateway</name>
<description>Demo project for Spring Boot</description>

<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>

<dependencies>
<!--        <dependency> -->
<!--            <groupId>org.springframework.cloud</groupId> -->
<!--            <artifactId>spring-cloud-starter-config</artifactId> -->
<!--        </dependency> -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <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>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>

​

Answer 1

我在本地maven存储库中发现eureka-clien-1.9.2.jar为零长度文件，所以我删除了它并重新下载了依赖项，一切正常！

Answer 2

希望能帮到别人--我在启动eureka服务器时遇到了同样的问题，我使用了java.lang.NoClassDefFoundError:com/netflix/discovery/converters/XmlXStream 2.0.3.RELEASE和spring-cloud.version Finchley.RELEASE。我通过重命名本地maven repo用户-folder.m2\存储库来解决这个问题，新加载了一个新的本地maven repo。

Answer 3

尝试在pom.xml中使用下面的依赖项

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.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.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <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>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <finalName>eureka-server</finalName>
    </build>