Java Load Database driver

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://127.0.0.1:3306/crashcourse", "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.

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Java Load Database driver