java mysql高可用性

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class MySQLConnectionExample {
    private static final String URL = "jdbc:mysql://localhost:3306/mydatabase";
    private static final String USER = "username";
    private static final String PASSWORD = "password";

    public static void main(String[] args) {
        Connection connection = null;
        try {
            // 加载MySQL JDBC驱动
            Class.forName("com.mysql.cj.jdbc.Driver");
            // 建立数据库连接
            connection = DriverManager.getConnection(URL, USER, PASSWORD);
            System.out.println("Connected to the database!");
        } catch (ClassNotFoundException e) {
            System.err.println("MySQL JDBC driver not found!");
            e.printStackTrace();
        } catch (SQLException e) {
            System.err.println("Failed to connect to the database!");
            e.printStackTrace();
        } finally {
            // 关闭数据库连接
            if (connection != null) {
                try {
                    connection.close();
                } catch (SQLException e) {
                    System.err.println("Failed to close the database connection!");
                    e.printStackTrace();
                }
            }
        }
    }
}