Question

我在tomcat中部署了我的第一个spring mvc项目。但是，它给出了类没有发现异常的问题＆＃34; DefaultConversionService＆＃34;我使用4.3.3.RELEASE版本的spring。我错过了任何依赖项或者我的pom.xml中的任何依赖项是错误的吗？

这是pom.xml

<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>CNC</groupId>
<artifactId>CNC</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<dependencies>

<dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
    </dependency> 


    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>6.0</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>com.thoughtworks.xstream</groupId>
        <artifactId>xstream</artifactId>
        <version>1.4.9</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring</artifactId>
        <version>2.5.6</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.3.3.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.3.3.RELEASE</version>
    </dependency>

    <!-- spring-context which provides core functionality -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.3.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>4.3.3.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.3.3.RELEASE</version>
    </dependency>



</dependencies>

</project>

错误日志

  Java.lang.NoClassDefFoundError: Could not initialize class org.springframework.core.convert.support.DefaultConversionService
at org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
at org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:42)
at org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:110)
at org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
at org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
at org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
at org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
at javax.servlet.GenericServlet.init(GenericServlet.java:158)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1151)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:828)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:135)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

Answer 1

我有类似的问题并做了一些研究。似乎在“ spring-core-4.3.3.RELEASE.jar ”工件的发布中出现了一个小故障。它错过了“核心”包，因此即使正确包含也会创建未找到类错误。

该软件包已re-updated the 19th of September 2016，其中包含（明显）更正的软件包。

因此，删除本地maven存储库中的“org.springframework”包（所有，只是为了确定），然后重新构建项目，下载新版本，应该神奇地解决问题！

希望这会有所帮助（在我的情况下确实有帮助）！

Answer 2

尝试添加spring-binding依赖项。

快速谷歌搜索显示DefaultConversionService位于此依赖项中。

https://1maven.com/classname-packaging?pk=&cl=DefaultConversionService

Answer 3

我在这里遇到了类似的问题，我也有类似的springframework软件包。

但是我通过删除来解决了这个问题：

<dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring</artifactId>
   <version>2.5.6</version>
</dependency>

更改pom.xml时必须清除目标目录。

而且，您不需要在依赖项中添加aop或context包，它会自动生成。

希望它对您有用！

Spring MVC-类org.springframework.core.convert.support.DefaultConversionService在4.3.3.RELEASE中不可用

错误日志

3 个答案: