初始化扩展bean内部类的bean时，上下文初始化失败

时间：2013-12-13 13:59:21

标签： java spring maven

我正在尝试使用我的applicationContext.xml初始化bean，但它无法初始化，可能是因为正在初始化的类正在扩展一个坐在jar中的抽象类。

所以在我的主项目的applicationContext中，我有以下内容：

<bean id="TestMessageListener" class="za.co.mycee.core.util.Test" />

我的Test.java如下：

package za.co.mycee.core.util;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.Message;
import org.springframework.beans.factory.annotation.Autowired;

import za.co.mycee.messaging.model.TestRequest;
import za.co.mycee.messaging.model.TestResponse;
import za.co.mycee.messaging.service.TestService;

import com.rabbitmq.client.Channel;

public class Test extends TestService {

    @Autowired
    private AmqpTemplate template;

    @Override
    protected String getQueue() {
        return "test";
    }

    @Override
    protected String getExchange() {
        return "";
    }

    @Override
    protected Class<TestRequest> getRequestType() {
        return TestRequest.class;
    }

    @Override
    protected Class<TestResponse> getResponseType() {
        return TestResponse.class;
    }

    @Override
    protected AmqpTemplate getTemplate() {
        return this.template;
    }

    @Override
    public void onMessage(Message message, Channel channel) throws Exception {

        System.out.println(" >> " + new String(message.getBody()));

    }

}

以及我在做一个mvn tomcat之后得到的完整异常：运行

2013-12-13 15:45:46,031 [main] ERROR org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [za.co.mycee.core.util.Test] for bean with name 'TestMessageListener' defined in file [C:\Code\SpringSource\sts-4.3.1.RELEASE\sts-3.4.0.RELEASE\mycee\mycee-core\target\classes\META-INF\spring\applicationContext.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: za/co/mycee/messaging/service/TestService
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1266)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:581)
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1332)
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:898)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:588)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
        at org.apache.catalina.startup.Embedded.start(Embedded.java:825)
        at org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:558)
        at org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:255)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.NoClassDefFoundError: za/co/mycee/messaging/service/TestService
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1141)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
        at org.springframework.util.ClassUtils.forName(ClassUtils.java:258)
        at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:415)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1284)
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1255)
        ... 39 more
Caused by: java.lang.ClassNotFoundException: za.co.mycee.messaging.service.TestService
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
        ... 55 more
Dec 13, 2013 3:45:46 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [za.co.mycee.core.util.Test] for bean with name 'TestMessageListener' defined in file [C:\Code\SpringSource\sts-4.3.1.RELEASE\sts-3.4.0.RELEASE\mycee\mycee-core\target\classes\META-INF\spring\applicationContext.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: za/co/mycee/messaging/service/TestService
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1266)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:581)
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1332)
        at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:898)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:588)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
        at org.apache.catalina.startup.Embedded.start(Embedded.java:825)
        at org.codehaus.mojo.tomcat.AbstractRunMojo.startContainer(AbstractRunMojo.java:558)
        at org.codehaus.mojo.tomcat.AbstractRunMojo.execute(AbstractRunMojo.java:255)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: java.lang.NoClassDefFoundError: za/co/mycee/messaging/service/TestService
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1141)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1612)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
        at org.springframework.util.ClassUtils.forName(ClassUtils.java:258)
        at org.springframework.beans.factory.support.AbstractBeanDefinition.resolveBeanClass(AbstractBeanDefinition.java:415)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doResolveBeanClass(AbstractBeanFactory.java:1284)
        at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1255)
        ... 39 more
Caused by: java.lang.ClassNotFoundException: za.co.mycee.messaging.service.TestService
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
        ... 55 more

Dec 13, 2013 3:45:46 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
Dec 13, 2013 3:45:46 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/mycee-core] startup failed due to previous errors
Dec 13, 2013 3:45:46 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext

显然，如果我删除了扩展的TestService并删除了所有@Override，那么它就会运行，但是我可以重新使用TestService中的代码。 如何让它知道坐在jar中的TestService并摆脱错误？

更新：正如Frederic正确地指出的那样，mycee-messaging.jar不在我的类路径中，当我构建war文件并查看WEB-INF / lib时，没有mycee-messaging 。罐。

所以在我的pom.xml中，我有：

<dependency>
    <groupId>za.co.mycee</groupId>
    <artifactId>mycee-messaging</artifactId>
    <version>${mycee.messaging}</version>
    <scope>provided</scope>
</dependency>

当我执行mvn eclipse：eclipse，并刷新mycee-core时，项目mycee-messaging列在项目下，eclipse似乎很好用，但它没有列在库下。

检查.m2 / repository / za / co / mycee / mycee-messaging / 1.0.1，我可以看到mycee-messaging-1.0.1.jar以及mycee-messaging-1.0.1.pom，所以mvn干净安装正确地完成了它的工作。

我是否需要在pom.xml中添加其他内容，以便maven在war文件中包含该jar？

解决方案：删除范围标记

一些好的阅读材料可以理解为什么提供的范围正在做它正在做的事情： http://docs.codehaus.org/display/MAVENUSER/Dependency+Scopes

1 个答案:

答案 0 :(得分：2)

 <scope>provided</scope>

意味着你希望在你的tomcat容器中为你提供依赖关系，所以maven不会在你的战争中为你捆绑它。

来自maven doc的更多信息：

  

提供的范围很像编译，但表示您期望JDK   或者在运行时提供依赖性的容器。例如，何时   您可以为Java Enterprise Edition构建Web应用程序   设置对Servlet API和相关Java EE API的依赖   提供范围是因为Web容器提供了这些类。这个   scope仅在编译和测试类路径上可用，并且是   不是过渡性的。

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