how to set the the URL of database directly from the database.properties file

Hi,

I am writing Unit test to test the DAO operation. For that I need to set the data source . I am doing that by using

ds.setDriverClassName("someClassName")
ds.setUsername("userName")
ds.setPassword("userPassWord")
ds.setUrl("urlOftheDataBse")
dao.setDataSource(ds);

Is there any way that we can set the data source directly from database.properties file (specially the URL). So, whenever there is any change in the URL of the database, it doesn't required to update manually in each test file.

Thanks.

Well, you could write code that reads that information in from a property file. I think I'm missing the point of your question though.

Well, my question is how you can read the information from the property file?

Thanks.

Originally posted by nis bootwala:
Well, my question is how you can read the information from the property file?

Now that question I understand! Take a look at this code sample for reading in a property file.

Hey, Thanks a lot.

Solution works for me but there is only one problem. It works only if you give the absolute path for the property file e.g "C:/project/......./filename.properties".

Is there any way I can just give "filename.properties" ? My property files are in WEB-INF folder.

Originally posted by nis bootwala:
Is there any way I can just give "filename.properties" ? My property files are in WEB-INF folder.

Yes. You can use the getResourceAsStream() method. This article has an example.

Thanks a lot for your help.

But I have already tried using "getResourceAsStream()" in following different ways and it doesn't work.

1)properties.load(this.getClass().getResourceAsStream("/database.properties"));

2)properties.load(getClass().getResourceAsStream("database.properties"));

3)ClassLoader.getSystemResourceAsStream("/WEB-INF/config/database.properties");
this.getClass().getResourceAsStream("/database.properties");
ResourceBundle.getBundle("WEB-INF.config.database");

It throws NullPointer Exception.

Thanks.

Moving to Java in General since this is now about classloading rather than testing.