How to load a properties file placed in a classpath from JSP?

Question

I have a properties file that I put in the classpath and I'm trying to load it from JSP:

InputStream stream = application.getResourceAsStream("/alert.properties"); 
Properties props = new Properties(); 
props.load(stream); 

But I get it FileNotFoundException.

Answer 1

ServletContext#getResourceAsStream()returns resources from webcontent, not from the classpath. You need ClassLoader#getResourceAsStream()instead.

ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
properties.load(classLoader.getResourceAsStream("filename.properties"));
// ...

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However, it is considered bad practice to write Java source code similar to this in a JSP file. You should do this (in) directly inside the class HttpServletor maybe ServletContextListener.