将属性文件添加到类路径但获取FileNotFoundException

时间:2013-04-23 03:29:11

标签: java spring spring-mvc classpath

我的春天上下文文件包含:

<context:property-placeholder location="classpath:web.properties" />

我引用了键/值,如:

<property name="username" value="${dataSource.username}"/>

我的文件布局如下:

>/www/site/app.war
>/www/site/configs/web.properties

我使用以下方式运行我的应用程序:

>java -cp "/www/site/configs/*.*" -jar app.war

但后来我得到了这个例外:

java.io.FileNotFoundException: class path resource [web.properties] cannot be opened because it does not exist
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:157)
    at org.springframework.core.io.support.PropertiesLoaderSupport.loadProperties(PropertiesLoaderSupport.java:181)
    at org.springframework.core.io.support.PropertiesLoaderSupport.mergeProperties(PropertiesLoaderSupport.java:161)
    at org.springframework.beans.factory.config.PropertyResourceConfigurer.postProcessBeanFactory(PropertyResourceConfigurer.java:78)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:686)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:661)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631)
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588)
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133)

即使我将文件添加到我的类路径中,它仍然找不到原因?

更新

所以我的配置文件在这里:

/www/site/configs/web.properties
/www/site/configs/log4j.properties

我试过了:

>/www/site/java -cp ".:app.war:/www/site/configs/*.*" com.abc.server.MyServer

>/www/site/java -cp ".:app.war:/www/site/configs/web.properties:/www/site/configs/log4j.properties" com.abc.server.MyServer

甚至:

  

/ www / site / java -cp“。:app.war”com.abc.server.MyServer

我得到同样的错误:

2013-04-25 01:19:28.210:INFO:oejs.Server:jetty-7.x.y-SNAPSHOT
2013-04-25 01:19:28.294:INFO:oejw.WebInfConfiguration:Extract jar:file:/www/site/app.war!/ to /www/site/work/app
2013-04-25 01:19:32.814:INFO:oejsh.ContextHandler:started o.e.j.w.WebAppContext{/,file:/www/site/app/},file:/www/site/app.war
log4j:WARN No appenders could be found for logger (org.springframework.web.context.support.StandardServletEnvironment).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
2013-04-25 01:19:33.585:INFO:/:Initializing Spring FrameworkServlet 'app'
2013-04-25 01:19:35.750:WARN:/:unavailable
org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'dataSource' defined in ServletContext resource [/WEB-INF/web-context.xml]: Could not resolve placeholder 'dataSource.url' in string value [${dataSource.url}]
    at org.springframework.beans.factory.config.PlaceholderConfigurerSupport.doProcessProperties(PlaceholderConfigurerSupport.java:209)

我的web.properties有:

dataSource.url=jdbc:mysql://localhost/appdb
dataSource.username=root
dataSource.password=123

我的web-context.xml文件再次出现:

..
 <context:property-placeholder location="classpath*:/web.properties" />

    <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="${dataSource.url}"/>
        <property name="username" value="${dataSource.username}"/>
        <property name="password" value="${dataSource.password}"/>
..

我还尝试了以下变体:

<context:property-placeholder location="classpath:web.properties" />
<context:property-placeholder location="classpath*:web.properties" />
<context:property-placeholder location="classpath*:/web.properties" />

2 个答案:

答案 0 :(得分:4)

我也遇到过类似的问题。我不能说为什么,但我发现-cp参数在与-jar一起拖拽时不会表现。

你可以使用,

修改

根据讨论并经历:http://docs.oracle.com/javase/6/docs/technotes/tools/windows/classpath.html

正确的语法应该是:

在Windows中:

java -cp "app.war;/www/site/configs/" <Main Class file name>

在Linux中:

java -cp "app.war:/www/site/configs/" <Main Class file name>

答案 1 :(得分:2)

  1. 通过CLASSPATH访问的项目根本不一定是文件。它们可能仍在JAR或WAR文件中。它们应该通过Class.getResource()和朋友作为资源,进行访问。

  2. CLASSPATH中的条目也不是文件。根据包结构,CLASSPATH是一个或多个目录或JAR文件,其中可以找到资源。