Thread: Accessing Properties File

Dear Experts

I am working on java classes using tomcat, I am able to access the properties file located in the "conf" folder under the webapps directory using this servlet code:

File propertiesFile = new File(servletContext.getRealPath("./conf/database.properties"));

but how can i access the same file using java class and not servlet

Any suggestion will be appreciated

Hello there,

My first thought is that you shouldn't use getRealPath as that wont work that well once you package your application in a war file and deploy it.

You need to use one of the getResource methods on the class loader.

public class IOTest {
    public static void main(String[] args) {
        final InputStream inputStream = IOTest4.class.getClassLoader().getResourceAsStream("conf/database.properties");
 
        final Properties properties = new Properties();
        properties.load(inputStream);
    }
}

Now that could would try and load conf/database.properties which would be on the classpath. You should make sure you put these resource files in WEB-INF/classes so your file would be in WEB-INF/classes/conf/database.properties

If you dont put it in classes or WEB-INF folder, you might be exposing the file to the end user as he/she could just browse to http://myserver.domain/mywebapp/conf...ase.properties and see the file.

Hope this makes any sense.

// Json

Dear Json

Many thanks for the reply, it was very helpfull

I need some more help from you in the following:

I am using the ConnectionPoolManager and for that in the getInstance I need to get the properties file either as a File or String

conMgr = ConnectionPoolManager.getInstance(propsFile);

how can I use your provided solution with the above scenario


Any suggestion will be appreciated

Thanks in advance

I'm not entirely sure what you mean but if you just want to push the properties into the getInstance method could you not just do this?

public class IOTest {
    public static void main(String[] args) {
        final InputStream inputStream = IOTest4.class.getClassLoader().getResourceAsStream("conf/database.properties");
 
        final Properties properties = new Properties();
        properties.load(inputStream);
 
        conMgr = ConnectionPoolManager.getInstance(properties);
    }
}

If not could you tell me what the package name for the ConnectionPoolManager is?

I use iBATIS myself for database stuff. See iBATIS Home for more information.

// Json

Dear Json,

Thanks again for the help

the package I am using is snaq.db.ConnectionPoolManager;
and the method getInstance dose not support java.util.properties

Any Suggestion

How about trying to use the createInstance method.

ConnectionPoolManager.createInstance(properties);

That should work I believe.

// Json