Learn the basics of JSP connection to MySQL database
Learn how to connect JSP to MySQL database from scratch
Preface
JSP (JavaServer Pages) is a dynamic web page technology that allows you to Java code is embedded in the HTML page. This allows you to create interactive and dynamic web pages such as shopping carts, online forms, and games.
MySQL is a popular open source relational database management system (RDBMS). It is known for its speed, reliability and scalability.
In this article, we will show you how to learn JSP from scratch to connect to a MySQL database. We'll cover the software required, how to set up a development environment, and how to write code to connect to the database.
Required Software
Before you begin, you need to make sure you have the following software installed on your computer:
- JDK (Java Development Kit)
- Apache Tomcat (Java Servlet container)
- MySQL (relational database management system)
- JSP editor (such as Eclipse or NetBeans)
Set up the development environment
- Install JDK.
- Install Apache Tomcat.
- Install MySQL.
- Create a JSP project.
- Add the MySQL JDBC driver to the project.
Write code to connect to the database
Now that you have set up your development environment, you can start writing code to connect to the database.
- Import the necessary Java packages into the JSP page.
- Create a connection pool.
- Get a connection from the connection pool.
- Use connections to execute SQL queries.
- Process query results.
- Close the connection.
Code Example
The following is a JSP code example to connect to a MySQL database:
<%@ page import="java.sql.*" %>
<html>
<body>
<%
// 导入必要的Java包
import java.sql.*;
// 创建一个连接池
ConnectionPool connectionPool = new ConnectionPool();
// 从连接池中获取一个连接
Connection connection = connectionPool.getConnection();
// 使用连接执行SQL查询
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("SELECT * FROM users");
// 处理查询结果
while (resultSet.next()) {
out.println(resultSet.getString("name"));
}
// 关闭连接
resultSet.close();
statement.close();
connection.close();
%>
</body>
</html>Run the code
To run the code, please add the JSP The page is saved to your project directory. Then, start the Apache Tomcat server. Finally, enter the URL of the JSP page into the browser.
Summary
In this article, we showed you how to learn JSP from scratch to connect to a MySQL database. We covered the required software, how to set up a development environment, and how to write code to connect to the database.
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