我可以在没有jar驱动程序的情况下使用jdbc吗？

Question

Profesor in my University send us the task related to graphs where he says :

data for the task are stored in database. Connection to this database is made by line of codes:

  String database = <connection_string>; // 
  Connection conn = DriverManager.getConnection(database);

where

 <connection_string> is command line param.

Nobody knows which of database he is going to use in his environment and another important thing is that running program should be released only with two files

 path.java
 main.java 

program have to run after this line in comand line:

 java Main <connection_string> 

My question is: How to implement such funcitonality without knowledge about kind of database ? Is it possible to run connection to database without any jdbc external jar ?

Thanks for help

Answer 1

Ok, so in your main method, args[1] is the JDBC connection String. You can use some splitting and/or regexes to comparate that with a list of connection strings/driver equivalences like this one to guess the fully qualified driver class name, and then do Class.forName(driver); . After that, you can get connections from the driver.

The profesor still has to add the driver to the classpath on his end, but your code will work whatever he uses.