将库添加为依赖项时,Spring初始化不起作用

时间:2017-08-18 17:19:09

标签: java spring maven spring-mvc

我有一个库可以运行Spring,并在项目中运行时正确初始化它。当我启动另一个项目并将此库添加为依赖项时,我收到初始化失败。 这是代码:

    public class CBRepoFactory implements IRepoFactory {

    private UserActivityRepositoryService userActivityRepositoryService;

    private ItemInformationRepositoryService itemInformationRepositoryService;

    public CBRepoFactory() {
        AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
        ctx.register(Config.class);
        ctx.scan("com.example.db.app");
        ctx.refresh();
        userActivityRepositoryService = ctx.getBean(UserActivityRepositoryService.class);
        itemInformationRepositoryService = ctx.getBean(ItemInformationRepositoryService.class);
        // ctx.close();
    }

    @Override
    public IRepoClient<UserActivity> getUserActivityRepositoryService() {
        // TODO Auto-generated method stub
        return this.userActivityRepositoryService;
    }

    @Override
    public IRepoClient<ItemInformation> getItemInformationRepositoryService() {
        // TODO Auto-generated method stub
        return this.itemInformationRepositoryService;
    }
   }

以下是我作为依赖项添加时从项目中获取的异常。

[main] INFO org.springframework.context.annotation.AnnotationConfigApplicationContext - Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@3d71d552: startup date [Fri Aug 18 14:05:41 PDT 2017]; root of context hierarchy
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/core/io/support/PropertySourceFactory
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:301)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:228)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:525)
    at com.ebay.db.app.clientImpl.CBRepoFactory.<init>(CBRepoFactory.java:23)
    at com.ebay.db.app.clientImpl.RepoFactoryBuilder.createFactory(RepoFactoryBuilder.java:11)
    at testDBClient.testProgram.main(testProgram.java:15)
Caused by: java.lang.ClassNotFoundException: org.springframework.core.io.support.PropertySourceFactory
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 9 more

任何人都可以帮助我。

1 个答案:

答案 0 :(得分:0)

前5行显示了您需要的所有信息,甚至是找到答案的地方:

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/Users/sukrishna/.m2/test2/org/slf4j/slf4j-simple/1.7.5/slf4j-simple-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/Users/sukrishna/.m2/test2/org/slf4j/slf4j-log4j12/1.7.10/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.SimpleLoggerFactory]

第1行说明实际问题。多个SLF4J绑定。这意味着您有更多的记录器版本/实现尝试执行相同的操作,这会引发异常。

第2行和第3行显示发生此冲突的位置

第4行告诉您在哪里可以查找有关错误的更多信息。如果你这样做,你会看到他们的建议here。如果您的pom中有多个实现(但我还没有看到它),您可以排除不在第5行的那个,如下所示:

<exclusions>
      <exclusion> 
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
      </exclusion>
      <exclusion> 
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
      </exclusion>
    </exclusions> 

如果这不起作用:尝试清除本地.m2存储库,可能会在那里缓存几个记录器。你可以用:

来做到这一点
mvn dependency:purge-local-repository

然而,如果它仍然适用于绑定问题,而不是使用bellow命令清除repo,它将保持为空并再次下载所有依赖项(清除后):

mvn dependency:purge-local-repository -DactTransitively=false -DreResolve=false

我不知道为什么会发生这种情况,你还没有发布你的pom但是我总是使用已经使用spring-boot的slf4j来避免这些问题,所以不需要额外的依赖。您可以像这样实例化它:

private final Logger logger = LoggerFactory.getLogger(this.getClass());

希望有所帮助