nested exception is java.io.FileNotFoundException: class path resource [spring/spring-datasource-mog

spring单元測试时发现的问题：

org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [spring/spring-datasource-mogon.xml]; nested exception is java.io.FileNotFoundException: class path resource [spring/spring-datasource-mogon.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.test.db.mongo.test.MongoTest.setUp(MongoTest.java:32)
at junit.framework.TestCase.runBare(TestCase.java:125)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.io.FileNotFoundException: class path resource [spring/spring-datasource-mogon.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)
... 26 morez

载入配置文件的代码例如以下：

ApplicationContext context = new ClassPathXmlApplicationContext("spring/spring-datasource-mogon.xml");

之前在写单元測试时也遇到过类似的问题，查询、核对代码和载入方式都没有问题，就是报错找不到文件。百思不得其解，一直以为是和环境相关。

今天在调试mongo时，最终找到问题所在了

出现故障的情况：仅仅要更新过、刷新过project，就会报如上错误；

解决的方法：

1. 新建一个内容同样，名字不同的配置文件；比如。将配置文件/spring-datasource-mogon.xml的名字改动为/spring-datasource-mogon-1.xm

2. 改动代码的载入配置文件为：ApplicationContext context = new ClassPathXmlApplicationContext("spring/spring-datasource-mogon-1.xml");

3. 调试。发现没有上述问题了。

问题总结：

1. 更新project后，单元測试载入的project也会刷新，刷新的时候配置文件从project环境中删掉了。

2. 改动名字。相当于加入了一个新的文件，这时project环境中会跟着同步。

3. 因此程序在载入新文件时能够找到。老的找不到。

4. 单元測试载入的配置文件的路径没有找到。假设找到了能够直接将老配置文件加入到当中

5. 遗留问题： 问什么刷新project时，会将配置文件所有清空；这个怎样避免

6. project的编辑存放路径和project执行环境路径的差别是什么，project执行环境路径是什么。