When running the jar package, read the files in the jar package.

When running the jar package, read the files in the jar package.
During the development process, we often encounter reading configuration files. The reading of configuration files varies depending on the environment. Generally, if relative/path is used from a non-jar package, it is relatively simple and will not be described.
In this case, we need to package our class into a jar file and use it. Then we will find that if we didn't consider this before, it may not work, how can this problem be solved? The method is as follows:
:
The following paths are available:
Web-info -- | --> classes ---> jdbc. properties
| --> Lib
In this case, we need to read jdbc. properties. When we do not use the jar package, we can use the following method to read the data:
File f = new File (this. getClass (). getResource ("/"). getPath ());
F = new File (f. getPath () + "/jdbc. properties ");
Note: f. getPath () is the absolute path where the class is located. For example, c: \ javasrc \ web-inf \ classes
Then, after processing the file object, you can read the configuration information, but add the above class to be packaged into a jar file. Then, when the program is executed here, the configuration file cannot be found. How can this problem be solved?

The solution is as follows:

Properties properties = new Properties ();

InputStream is = current class name. class. getClassLoader (). getResourceAsStream ("jdbc. properties ");

Properties. load (is );

String driver = properties. getProperty ("jdbc. driverClassName ");