从可运行的jar访问外部Spring配置文件

Question

以下是我的目录结构

/app/infra/myjar/bin --> contains my runnable jar
/app/infra/myjar/config --> contains all external config files which I want to read from code which is inside jar.

下面是我读取外部spring配置文件的代码

ApplicationContext basicConfig =  new ClassPathXmlApplicationContext("classpath:/spring-bean-mapping.xml");

我的MANIFEST文件有以下条目:

Class-Path:
.
../config/

我还设置了CLASSPATH变量在我的。bashrc指向/app/infra/myjar/config文件夹

当我尝试使用

运行jar时

java -jar myjar.jar

我得到以下异常

Loading Spring Bean Mapping file
log4j:WARN No appenders could be found for logger        (org.springframework.core.env.StandardEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [spring-bean-mapping.xml]; nested exception is      java.io.FileNotFoundException: class path resource [spring-bean-mapping.xml] cannot be opened because it does not exist
    at  org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:341)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:174)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:209)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:243)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)
    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)
    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:537)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.vzw.esper.alerts.consumer.EsperMessagesConsumer.main(EsperMessagesConsumer.java:47)
Caused by: java.io.FileNotFoundException: class path resource [spring-bean-mapping.xml]  cannot be opened because it does not exist
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:157)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:328)
    ... 13 more
Exception in thread "main" java.lang.NullPointerException
    at com.vzw.esper.alerts.consumer.EsperMessagesConsumer.main(EsperMessagesConsumer.java:86)

我怎么知道这里出了什么问题?

Answer 1

我能够解决第二个问题，我得到的问题与弹簧组件扫描。

我跟随下面的春季论坛链接，它工作!!

http://forum.spring.io/forum/spring-projects/container/89556-component-scanning-works-in-ide-but-not-in-an-executable-jar-file

Answer 2

幸运的是，我能够解决上述问题。问题是当我通过Eclipse创建一个可执行jar时，它覆盖了我的MANIFEST.MF类路径条目。

因此，在jar创建之后，我将MANIFEST.MF文件更改为具有所需的条目，并且它工作了。