项目启动时报错

Question

在网上找了很久没找到办法，是不是我的pom有问题？
这是报错信息：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2020-02-23 18:15:47.243 ERROR 17480 --- [           main] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'configurationPropertiesBeans' defined in class path resource [org/springframework/cloud/autoconfigure/ConfigurationPropertiesRebinderAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans]: Factory method 'configurationPropertiesBeans' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.cloud.context.properties.ConfigurationPropertiesBeans]: Factory method 'configurationPropertiesBeans' threw exception; nested exception is java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:182) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:575) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
	... 28 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/boot/context/properties/ConfigurationBeanFactoryMetadata
	at org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration.configurationPropertiesBeans(ConfigurationPropertiesRebinderAutoConfiguration.java:57) ~[spring-cloud-context-2.1.5.BUILD-20200131.002935-351.jar:2.1.5.BUILD-SNAPSHOT]
	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:567) ~[na:na]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:155) ~[spring-beans-5.0.0.RC3.jar:5.0.0.RC3]
	... 29 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.properties.ConfigurationBeanFactoryMetadata
	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]
	... 35 common frames omitted

这个是我的pom文件

<?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 https://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>2.0.0.M3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.imooc</groupId>
    <artifactId>eureka4</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka4</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Greenwich.BUILD-SNAPSHOT</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>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</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>
        </repository>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

Answer 1

廖师兄 2020-02-26 01:19:56

看报错是依赖没下载好。你运行课程项目源码试试

• 提问者 我的曲奇饼呢 #1

  这个问题已经解决了，是我java版本太高了。

Answer 2

慕雪8062931 2020-02-24 11:52:59

报错是注入配置类的bean对象失败, 我猜是因为springcloud的版本问题.

把<properties>

       <java.version>1.8</java.version>
       <spring-cloud.version>Greenwich.BUILD-SNAPSHOT</spring-cloud.version>
   </properties>

改成<spring-cloud.version>Finchley.M2</spring-cloud.version>试试? 

• 提问者 我的曲奇饼呢 #1

  没有之前的报错了，不过还是启动不了。。。
  
  java.lang.ClassCastException: class org.springframework.cloud.context.environment.EnvironmentChangeEvent cannot be cast to class org.springframework.boot.web.context.WebServerInitializedEvent (org.springframework.cloud.context.environment.EnvironmentChangeEvent and org.springframework.boot.web.context.WebServerInitializedEvent are in unnamed module of loader 'app')