Welcome to the JDBC tutorial! JDBC (Java Database Connectivity) is a Java API for connecting and interacting with databases. This guide will help you get started with JDBC and provide you with the knowledge to connect, execute queries, and manage database operations in Java applications.

JDBC 简介

JDBC is a widely-used API for connecting Java applications to various databases. It provides a uniform way to interact with databases, regardless of the underlying database technology.

JDBC 功能

  • Connection Management: Establishing and managing connections to databases.
  • Query Execution: Executing SQL queries and statements.
  • Result Processing: Handling the results of queries and statements.
  • Transaction Management: Managing database transactions.

JDBC 安装

To use JDBC, you need to download and add the JDBC driver for your database to your project. You can find the drivers for most popular databases on their official websites.

JDBC 连接数据库

The first step in using JDBC is to establish a connection to the database. Here's an example of how to connect to a MySQL database:

Connection conn = DriverManager.getConnection(
    "jdbc:mysql://localhost:3306/mydatabase", "username", "password");

执行 SQL 查询

Once you have a connection, you can execute SQL queries using Statement or PreparedStatement objects.

Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM mytable");

处理查询结果

After executing a query, you can retrieve the results using a ResultSet object.

while (rs.next()) {
    String name = rs.getString("name");
    int age = rs.getInt("age");
    System.out.println(name + " - " + age);
}

事务管理

JDBC provides transaction management features to ensure data integrity. You can use Connection object's setAutoCommit() and commit() methods to manage transactions.

conn.setAutoCommit(false);
stmt.executeUpdate("UPDATE mytable SET name = 'Alice' WHERE id = 1");
conn.commit();

JDBC 扩展阅读

For more detailed information about JDBC, you can refer to the following resources:

希望这个教程能帮助你更好地了解和使用 JDBC！🚀