Http Servlet Response; @Web Servlet("/Delete Servlet") public class Delete Servlet extends Http Servlet import
Http Session; import org.o7planning.simplewebapp.beans. User Account; public class My Utils package org.o7planning.simplewebapp.utils; import
JDBCFilter will check the request to ensure that it only opens JDBC connection for the necessary request, eg for Servlet, avoid opening JDBC connection to common requests like image, css, js, html package org.o7planning.simplewebapp.filter; import
You have to download JDBC library to driving the connection with the Database.
In this document, I download both of 3 JDBC libraries for Oracle, My SQL, SQL Server, in practice, you only need JDBC library corresponding to the type of database you are using.
In this Java tutorial, we’re going to help you understand the process of coding a basic Java web application that manages a collection of books with the basic feature: list, insert, update, delete (or CURD operations - Create, Update, Read and Delete). * @author */ public class Book DAO For detailed instructions on CRUD operations with JDBC, see JDBC Tutorial: SQL Insert, Select, Update, and Delete Examples.
The application looks something like this: You will learn to how to build this application using the following technologies: CREATE DATABASE 'Bookstore'; USE Bookstore; CREATE TABLE `book` ( `book_id` int(11) NOT NULL AUTO_INCREMENT, `title` varchar(128) NOT NULL, `author` varchar(45) NOT NULL, `price` float NOT NULL, PRIMARY KEY (`book_id`), UNIQUE KEY `book_id_UNIQUE` (`book_id`), UNIQUE KEY `title_UNIQUE` (`title`) ) ENGINE=Inno DB AUTO_INCREMENT=11 DEFAULT CHARSET=latin1 Dynamic Web Project to create a new Java dynamic web project. Next, create a JSP page for displaying all books from the database. = /* means that all requests of users have go through this filter. User Account; public class DBUtils In JDBCFilter, I checked which requests actually referred to a Servlet, so that you can see the picture below to find it easy to understand, it describes the relationship between the concepts of Servlet. Connection Utils; import org.o7planning.simplewebapp.utils. My Utils; @Web Filter(filter Name = "jdbc Filter", url Patterns = ) public class JDBCFilter implements Filter In case, the user logined and remembered information in previous access (for example the day before). Http Session; import org.o7planning.simplewebapp.beans. User Account; import org.o7planning.simplewebapp.utils. Http Servlet Response; @Web Servlet("/Edit Servlet") public class Edit Servlet extends Http Servlet import