在ssh中 无法读取数据源配置文件 dataSource.properties 的问题

• 错误

十月 11, 2016 5:32:41 下午 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring root WebApplicationContext
十月 11, 2016 5:32:42 下午 org.apache.catalina.core.StandardContext listenerStart
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanInitializationException: Could not load properties; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/dataSource.properties]
  at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.postProcessBeanFactory(PropertySourcesPlaceholderConfigurer.java:151)
  at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:265)
  at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:162)
  at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:606)
  at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:462)
  at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:276)
  at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:197)
  at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
  at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
  at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
  at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
  at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
  at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
  at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
  at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1551)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
  at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
  at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
  at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:622)
  at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:569)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
  at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
  at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
  at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1466)
  at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)
  at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1307)
  at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1399)
  at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:828)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:497)
  at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:323)
  at sun.rmi.transport.Transport$1.run(Transport.java:200)
  at sun.rmi.transport.Transport$1.run(Transport.java:197)
  at java.security.AccessController.doPrivileged(Native Method)
  at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
  at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)
  at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)
  at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$254(TCPTransport.java:683)
  at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$1/444230198.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/dataSource.properties]
  at org.springframework.web.context.support.ServletContextResource.getInputStream(ServletContextResource.java:117)
  at org.springframework.core.io.support.EncodedResource.getInputStream(EncodedResource.java:143)
  at org.springframework.core.io.support.PropertiesLoaderUtils.fillProperties(PropertiesLoaderUtils.java:98)
  at org.springframework.core.io.support.PropertiesLoaderSupport.loadProperties(PropertiesLoaderSupport.java:175)
  at org.springframework.core.io.support.PropertiesLoaderSupport.mergeProperties(PropertiesLoaderSupport.java:156)
  at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.postProcessBeanFactory(PropertySourcesPlaceholderConfigurer.java:142)
  ... 53 more

十月 11, 2016 5:32:42 下午 org.apache.catalina.core.ApplicationContext log
信息: Closing Spring root WebApplicationContext


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• 分析原因

单纯代码测试中   这个问题不会出现   一旦部署到容器中  就会抛出上面的异常

因为 在  web.xml文件中 我们要在应用启动就加载 spring的配置文件    所以会在web.xml中 配置相关信息如下

<!--应用启动就加载配置文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:spring_cfg.xml</param-value>
    </context-param>

这样   可以在加载时 就读取spring的配置文件  当读到 dataSource.properties时     我们很容易在spring中的配置文件中 进行如下的错误配置

<!--加载数据源配置文件 此处要解决路径问题 避免部署时出现问题-->
    <context:property-placeholder location="dataSource.properties"/>

这时 io无法正确加载    dataSource.properties      归根到底就是路径问题     

所以   如法炮制     在  dataSource.properties 前也加上  classpath*:

正确的方式为：


<!--加载数据源配置文件 此处要解决路径问题 避免部署时出现问题-->
    <context:property-placeholder location="classpath:dataSource.properties"/>