Explain about ServletConfig Interface ?

Posted in: Servlets FAQs

1. ServletConfig a ServletConfig object is used to obtain configuration data when it is loaded. 
2. There can be multiple ServletConfig objects in a single web application.
3. This object defines how a servlet is to be configured is passed to a servlet in its init method. 
4. Most servlet containers provide a way to configure a servlet at run-time (usually through flat file) and set up its initial parameters. 
5. The container, in turn, passes these parameters to the servlet via the ServetConfig.

TestServlet
TestServlet

driverclassname
sun.jdbc.odbc.JdbcOdbcDriver


dburl
jdbc:odbc:MySQLODBC

public void init()
{
ServletConfig config = getServletConfig();
String driverClassName = config.getInitParameter("driverclassname");
String dbURL = config.getInitParameter("dburl");
Class.forName(driverClassName);
dbConnection = DriverManager.getConnection(dbURL,username,password);
}