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Servlet JDBC Database Connection Example. Servlet JDBC Database connection and Log. We have provided a lot of tutorials on servlets in java, this tutorial is aimed to use all of those information to create a full- fledged web application with database connectivity and log.

I strongly recommend to check out following tutorials if you are not familiar with any of these. All of them contains sample project that you can download and run for understanding the core concepts of Servlet API. J2. EE Web Application Overview.

Best practices to improve performance in JDBC. This topic illustrates the best practices to improve performance in JDBC with the following sections.

Servlet Tutorial for Beginners. Session Management in Servlets.

Oracle JDBC FAQ Updated March 1, 2017. This document contains answers to the most frequently asked questions about Oracle's JDBC drivers. Note that this FAQ. Example on struts 2 insert,update,delete operations with jdbc, Using prepareStatement struts 2 insert, edit, delete application with jdbc connect. Using the Teradata JDBC Driver. This chapter describes using the Teradata JDBC Driver software in Java programs, and guides you through the process of getting. Java Database Connectivity (JDBC) is a method of Java calling SQL and PL/SQL. The DML operations of SELECT, INSERT, UPDATE, and DELETE as well as calling PL/SQL. This example demonstrates how to perform a pivot using dynamic headers based on the row values of a table. The article also shows how to pass a temp table variable to. Servlet JDBC Example, Database Connection, Servlet MySQL, Log4j, JSP registration form, JSP login page, Exception, Error Handler, Filter, Download project.

Dynamic Update Query In Jdbc Example Code

Servlet Filter. Servlet Listener. Servlet Exception Handling. Servlet Cookie Example. Develop a web application that should have following features.

User can register and then login to the application. The users information should be maintained in database. Use standard logging framework log. The application should support session management, no JSPs should be visible without session. Users can logout anytime from the application. We should not show application and server details to user incase of any exception in application or other common errors like 4. Once we have our basic application ready, we can move on to add other features.

Design Decisions. Since login page is the entry point of application, we will have a simple login. We can’t rely on javascript validations, so we will do server side validation and incase of missing information we will redirect user to login page with error details. We will have a register. User should provide email, password, name and country details for registration. If any information is missing, user will remain on same page with error message.

If registration is successful, user will be forwarded to the login page with registration success information and they can use email and password to login. We will use My. Sql database for persisting user information. We will create a new database, user and Users table for our application. Since our application totally depends on Database Connection, we will create a servlet context listener to initialize the database connection and set it as context attribute for other servlets. We will keep DB configuration details configurable through deployment descriptor. We will also add My. Sql Java Connector jar to the application libraries.

Since we want to use log. XML file location in web. We will write our application logs in a separate log file dbexample.

Incase of any exceptions like “Database Connection Error” or 4. Genesis 2 Female S Morphs Bundle Downloader. We will utilize servlet exception handling and write our own Exception Handler servlet and configure it in deployment descriptor. Once the user logins successfully, we will create a session for the user and forward them to home. We will have a model class User that will store the user data into session. User home page also provide logout button that will invalidate the session and forward them to login page. We need to make sure all the JSPs and other resources are accessible only when user has a valid session, rather than keeping session validation login in all the resources, we will create a Servlet Filter for session validation and configure it in deployment descriptor.

We will use Servlet 3. We will use Eclipse for development and Tomcat 7 for deployment. Based on above requirements and design decisions, we will create our dynamic web project whose project structure will look like below image. Let’s understand each one of the components and understand their implementation. Servlet JDBC Example – Database Setup.

We will use below My. Sql script for new Database, User and Table setup to be used in our application.- - login with root to create user, DB and table and provide grants. User. DB. CREATE TABLE `Users` (. NOT NULL AUTO. We will use this class for database connection and then set the connection object to servlet context attribute that other servlets can use. Connection. import java.

Driver. Manager. import java. SQLException. public class DBConnection.

Manager . Notice the use of context init params for DB connection and log. When context will be destroyed, we are closing database connection in context. Destroyed() method.

Since we are using Servlet 3, we don’t need to configure it in web. Web. Listener annotation. File. import java. Connection. import java. SQLException. import javax.

Servlet. Context. Servlet. Context. Event. import javax.

Servlet. Context. Listener. import javax. Web. Listener. import org. Basic. Configurator. DOMConfigurator. import com.

DBConnection. Manager. App. Context. Listener implements Servlet. Context. Listener ? As of now please bear with this. Run the Servlet JDBC Example Application. Our application is ready for execution, I would suggest to export it as WAR file and then deploy to tomcat rather than deploying it directly to Tomcat server from Eclipse so that you can easily look into the log. Some sample execution pages are shown in below images.

User Registration Page: Registration Success Page: Login Page: User Home Page: 4. Error Page: Input Validation Error Page: log.

Log File: dbexample.