【求助】项目启动报java.lang.NoClassDefFoundError异常

[gyt917]

异常信息：
exception

javax.servlet.ServletException: Servlet.init() for servlet springmvc threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:522)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
root cause

java.lang.NoClassDefFoundError: Could not initialize class org.springframework.core.convert.support.DefaultConversionService
org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:42)
org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:113)
org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
javax.servlet.GenericServlet.init(GenericServlet.java:158)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:522)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)

我确定已经引入jar包，在代码中查询类名（DefaultConversionService）是可以找到该类的。
但是完全不知道是什么问题啊！！！
又没有大神解决一下。

[gyt917]

pom配置： <?xml version="1.0" encoding="UTF-8"?> <project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0" 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>account</groupId> <artifactId>account</artifactId> <version>1.0.0</version> <name>account</name> <description>account</description> <packaging>pom</packaging> <!-- 配置参数值--> <properties> <!-- Spring版本号 --> <spring.version>4.3.2.RELEASE</spring.version> <!-- aspectj Spring AOP所依赖的包版本 --> <aspectj.version>1.8.9</aspectj.version> <!-- log4j日志管理包版本号 --> <slf4j.version>1.7.21</slf4j.version> <!-- 映入JSON版本号 --> <jackson.version>2.8.1</jackson.version> <!-- hibernate版本号 --> <hibernate.version>5.2.4.Final</hibernate.version> <jdk.version>1.8</jdk.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> </properties> <dependencyManagement> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- Spring start--> <!-- 核心工具包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <!-- AOP相关类 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- Spring end--> <!-- Spring-dependency start--> <!-- aspectj Spring AOP所必须的包--> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>${aspectj.version}</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>${aspectj.version}</version> </dependency> <!-- Spring-dependency end--> <!-- MyBatis start --> <!-- Mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.1</version> </dependency> <!-- Mybatis/Spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <!-- MyBatis start --> <!-- MySQL数据库链接jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.39</version> </dependency> <!-- 针对数据库访问操作的动态监测框架，可无缝截取和操纵数据库数据，而不必修改现有的应用程序代码 --> <dependency> <groupId>p6spy</groupId> <artifactId>p6spy</artifactId> <version>3.0.0-rc2</version> </dependency> <!-- 用户xml文件的序列化 --> <!-- TODO 可能有问题 --> <dependency> <groupId>com.thoughtworks.xstream</groupId> <artifactId>xstream</artifactId> <version>1.4.9</version> </dependency> <!-- velocity start--> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity</artifactId> <version>1.7</version> </dependency> <dependency> <groupId>org.apache.velocity</groupId> <artifactId>velocity-tools</artifactId> <version>2.0</version> </dependency> <!-- velocity end --> <!-- 实现http方法和请求 --> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.2</version> </dependency> <!-- servlet & jsp --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.0-b01</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> </dependency>

[gyt917]

<!-- JSON解析包(jackson) start --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency> <!-- dubbo --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> </dependency> <!-- 日志文件管理包 log start--> <!-- log4j日志实现核心包 --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.6.2</version> </dependency> <!-- 用于适配log4j和slf4j --> <dependency> <groupId>com.googlecode.log4jdbc</groupId> <artifactId>log4jdbc</artifactId> <version>1.2</version> </dependency> <!-- 系统接入log4j日志实现的接口 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <!-- 用于适配log4j和slf4j --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- 将原本是通过 JCL 输出日志的组件重定向至slf4j --> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>${slf4j.version}</version> </dependency> <!-- log end--> <!-- commons --> <!-- dbcp的jar包 (DBCP: 管理数据库连接池,配置后可增加数据库并发量)--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>2.1.1</version> </dependency> <!-- 封装IO流和文件处理方法 --> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.5</version> </dependency> <!-- 用于处理常用的编解码方法：如SHA1、MD5、URL等 --> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.10</version> </dependency> <!-- 封装日志处理工具，使得不关心日志的实现类型是log4j还是sun logger --> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.2</version> </dependency> <!-- 包含JavaBean操作有关的工具方法，便于利用Java反射机制来完成代码功能 --> <dependency> <groupId>commons-beanutils</groupId> <artifactId>commons-beanutils</artifactId> <version>1.9.2</version> </dependency> <!-- 实现比jdk更多的集合功能 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-collections4</artifactId> <version>4.1</version> </dependency> <!-- 将xml文件按照[编码形式或xml配置文件形式]映射成java对象 --> <dependency> <groupId>commons-digester</groupId> <artifactId>commons-digester</artifactId> <version>1.8</version> </dependency> <!-- apache.commons start --> <!-- 提供基本类型处理的工具类 --> <!-- TODO --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>19.0</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>${hibernate.version}</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-compress</artifactId> <version>1.11</version> </dependency> </dependencies> </dependencyManagement> <modules> <module>account-domain</module> <module>account-api</module> <module>account-common</module> <module>account-core</module> <module>account-rpc</module> <module>account-front</module> <module>account-operation</module> <module>account-dao</module> <module>account-manager</module> <module>account-service</module> <module>account-webServer</module> </modules> </project>

[gyt917]

以解决，是dubbo依赖的spring包和spring-core包冲突了

[guozimi1]

引用 3 楼 gyt917 的回复:

以解决，是dubbo依赖的spring包和spring-core包冲突了

楼主具体是怎么解决的啊 怎么做的