Updating table with integer values using jdbc in servlets
String insert Table SQL = "INSERT INTO DBUSER" "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES" "(? )"; Prepared Statement prepared Statement = db Connection.prepare Statement(insert Table SQL); prepared Int(1, 11); prepared String(2, "mkyong"); prepared String(3, "system"); prepared Timestamp(4, get Current Time Stamp()); // execute insert SQL stetement prepared Statement .execute Update(); package com.mkyong.jdbc; import
If you are not sure or don’t know exactly the index of column, so passing a column name would be useful: String sql = "UPDATE Users SET password=? This try to built a connection between Url and database.con.create Statement ( ) : This is used to return you Sql object.create database Sample DB; use Sample DB; CREATE TABLE `users` ( `user_id` int(11) NOT NULL AUTO_INCREMENT, `username` varchar(45) NOT NULL, `password` varchar(45) NOT NULL, `fullname` varchar(45) NOT NULL, `email` varchar(45) NOT NULL, PRIMARY KEY (`user_id`) ); Practical Database Programming with Java - This book is for those who are beginner in Java database programming and want to catch up with the main database programming techniques with straightforward and easy to learn example code. This method returns an update count indicating how many rows in the table were affected by the query, so checking this return value is necessary to ensure the query was executed successfully.String sql = "INSERT INTO Users (username, password, fullname, email) VALUES (? In this case, method should return 1 to indicate one record was inserted.Let’s look at the code first:package net.codejava.javaee.bookstore; import Type the following URL in your web browser to access the Bookstore application: First time, the list is empty because there hasn’t any books yet: Click on the hyperlink Add New Book to begin adding a new book: Enter book information (title, author and price) and click Save.
The application saves the book and shows the list, as shown below: In this list, you can click on the Edit and Delete hyperlinks to edit and delete a specific book.
In this Tutorial we want to describe you a code that helps you in understanding JDBC Execute update Example.
For this we have a class JDBC Execute update, Inside this class we have a main method that include the list of following steps to be followed - The first step is to import a package * -The * specify the list of all the classes defined in this package that provides you an network interface for java front end application to communicate with backend database.
Second changes is the do Get() in Controller Servlet.java1.
Servlet Path() replace with Context Path() Servlet Path();2.
Although the target database system is My SQL, but the same technique can be applied for other database systems as well because the query syntax used is standard SQL which is supported by all relational database systems.