The best method for a programmer to load a property file inside a Java web application is to read the property file location and call it using

<context -param>
    <param -name/>serverpropertiesfile
    <param -value/>/WEB-INF/classes/server.properties
</context>

The above xml is taken from my WEB.XML file.

The advantage of this approach is that you don’t have to provide the filename/path every time you call the property file. It is really handy when the class files are located in different location.

Here you can declare the param-name as something that can be used as a reference to the original file name.

Let the content or data inside the server.properties file be

DATA=This is a test property that will load the value of DATA from the properties file.

Param-value will have the relative path of the property file.

Here in the above example i am giving the param-name as serverpropertiesfile and the param-value as /WEB-INF/classes/server.properties

Now how to read this property file from a Java code?

It is very simple all you have to do is

String path_prop = getServletContext().getInitParameter("serverpropertiesfile");
final InputStream is = getServletContext().getResourceAsStream(path_prop);
// load a properties file
prop.load(is);
// get the property value and print it out
String path = prop.getProperty("DATA");
System.out.println(path);

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