spring 如何在spring上下文配置文件中定位properties文件
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How to locate the properties file in the spring context configuration file
提问by hguser
I am using spring web mvc project, and I put all the spring related files under WEB-INF\spring, including a ormlite.xmland a jdbc.properties.
我使用的是spring web mvc项目，我把所有spring相关的文件都放在了下WEB-INF\spring，包括aormlite.xml和a jdbc.properties。
Now I want to locate the jdbc.propertiesfile in the ormlite.xml,Like this:
现在我想在 中找到该jdbc.properties文件ormlite.xml，如下所示：
<context:property-placeholder location="/WEB-INF/spring/jdbc.properties"/>
But when I run the application ,it will told me that :
但是当我运行应用程序时，它会告诉我：
Could not load properties
Could not load properties
It can not find the properties file.
它找不到属性文件。
What is the problem?
问题是什么？
回答by hguser
From Spring forum:
来自Spring论坛：
The problem is that /WEB-INF isn't accessible as it isn't in the root of the path, you must use the same path as you use in your test case (include the src/main/webapp part but that will break your application from running).
I suggest you move the jdbc.properties to the src/main/resources directory and simply use classpath: prefix to load the properties.
Code:
<context:property-placeholder location="classpath:jdbc.properties"/>The code above assumes they are on the root of the classpath (which is where they are when they are in
src/main/resources).
问题是 /WEB-INF 不可访问，因为它不在路径的根目录中，您必须使用与您在测试用例中使用的路径相同的路径（包括 src/main/webapp 部分，但这会中断您的应用程序正在运行）。
我建议您将 jdbc.properties 移动到 src/main/resources 目录并简单地使用 classpath: 前缀来加载属性。
代码：
<context:property-placeholder location="classpath:jdbc.properties"/>上面的代码假设它们位于类路径的根目录（这是它们在 中时所在的位置
src/main/resources）。
I hope this can help someone else.
我希望这可以帮助别人。
回答by Torgeist
I had the same problem - property files outside the classpath.
我有同样的问题 - 类路径之外的属性文件。
My solution:
我的解决方案：
First define a properties bean:
首先定义一个属性bean：
<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
<property name="location">
<value>/WEB-INF/your.properties</value>
</property>
</bean>
Then reference it in the property-placeholder:
然后在属性占位符中引用它：
<context:property-placeholder properties-ref="configProperties" />
Works perfectly well for me!
对我来说效果很好！
回答by Paulius Matulionis
Instead of:
代替：
<context:property-placeholder location="/WEB-INF/spring/jdbc.properties"/>
Use:
用：
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"
p:location="/WEB-INF/spring/jdbc.properties"/>
And your properties will be available in Spring file, and don't forget to add a namespace: xmlns:p="http://www.springframework.org/schema/p"
您的属性将在 Spring 文件中可用，并且不要忘记添加命名空间： xmlns:p="http://www.springframework.org/schema/p"
回答by Rob Blake
I think you're missing the prefix to instruct Spring how to attempt to load the properties. I think your definition needs to be:
我认为您缺少指示 Spring 如何尝试加载属性的前缀。我认为你的定义需要是：
<context:property-placeholder location="file:/WEB-INF/spring/jdbc.properties"/>
Note the addition of the file:prefix.
请注意添加了file:前缀。
