How to Load Properties Files from Within Java Packages?

Loading Properties Files from Within Java Packages

Loading properties files that reside deep within a package structure can be a challenge. Suppose you want to access a properties file located in com.al.common.email.templates.

To resolve this, use the following code within your class in the specified package:

<code class="java">Properties prop = new Properties();
InputStream in = getClass().getResourceAsStream("foo.properties");
prop.load(in);
in.close();</code>

Remember to include proper exception handling.

If your class is not within the desired package, adjust the InputStream acquisition:

<code class="java">InputStream in = getClass().getResourceAsStream("/com/al/common/email/templates/foo.properties");</code>

Note that relative paths in getResource() or getResourceAsStream() are resolved within the package where your class resides. Hence, java.lang.String.class.getResource("foo.txt") searches for the nonexistent file /java/lang/String/foo.txt. Absolute paths (starting with '/') bypass the current package.

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