Java Load Database driver

Source: Internet
Author: User

JDBC Programming steps See JDBC programming steps

The first step in JDBC programming is to load the database driver, using the class forname () method, Class.forName ("Com.mysql.jdbc.Driver").

        // load MySQL driver        Class.forName ("Com.mysql.jdbc.Driver");         // Get database connection        Connection conn = drivermanager.getconnection ("Jdbc:mysql://", "root", "123456");

What is more puzzling is how it is loaded, and how the subsequent drivermanager is used by the driver.

Open the driver source code, you can see the following content

/**  *  

Static code blocks in the source:

    Static {        try  {            java.sql.DriverManager.registerDriver (new  Driver ());         Catch (SQLException E) {            thrownew runtimeexception ("Can ' t register driver!" );        }    }

As a class.forname ("Com.mysql.jdbc.Driver"), when loading the Driver class and statically initializing the class, a Driver object is created and the register is made by DriverManager.


Java Load Database driver

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