do we need to deploy war after changing property file

Do we need t开发者_如何学JAVAo deploy war after changing the property file in java?

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At least you may have to restart the application so that it reads the new property file. So re-deploying the entire application may not be necessary.

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you do need war to deploy if property file is not loaded each time it is needed

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Yes, unless you make your context reloadable. To do that update your conf/context.xml, adding the "reloadable" attribute to the root node like so:

<Context reloadable="true">

Take a look at the Tomcat Config Docs.