initializelibrary.java

使用Servlet和JSP进行Web组件开发

/*
 * InitializeLibrary.java
 *
 * 
 */

package com.dvd.web;

import com.dvd.model.DVDLibrary;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextListener;
import javax.servlet.ServletContextEvent;

/**
 *
 * @author  
 * @version
 *
 * Web application lifecycle listener.
 */

public class InitializeLibrary implements ServletContextListener {
    /**
     * ### Method from ServletContextListener ###
     * 
     * Called when a Web application is first ready to process requests
     * (i.e. on Web server startup and when a context is added or reloaded).
     * 
     * For example, here might be database connections established
     * and added to the servlet context attributes.
     */
    public void contextInitialized(ServletContextEvent evt) {
    }

    /**
     * ### Method from ServletContextListener ###
     * 
     * Called when a Web application is about to be shut down
     * (i.e. on Web server shutdown or when a context is removed or reloaded).
     * Request handling will be stopped before this method is called.
     * 
     * For example, the database connections can be closed here.
     */
    public void contextDestroyed(ServletContextEvent evt) {
        // TODO add your code here e.g.:
        /*
                Connection con = (Connection) e.getServletContext().getAttribute("con");
                try { con.close(); } catch (SQLException ignored) { } // close connection
        */
    }
}