eclipse如何调用mysql数据库

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

public class MySQLExample {
    public static void main(String[] args) {
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        try {
            // 连接到MySQL数据库
            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/database_name", "username", "password");

            // 创建一个Statement对象
            statement = connection.createStatement();

            // 执行SQL查询
            resultSet = statement.executeQuery("SELECT * FROM table_name");

            // 处理查询结果
            while (resultSet.next()) {
                String column1Value = resultSet.getString("column1");
                int column2Value = resultSet.getInt("column2");
                System.out.println("Column 1: " + column1Value + ", Column 2: " + column2Value);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭数据库连接和资源
            try {
                if (resultSet != null) {
                    resultSet.close();
                }
                if (statement != null) {
                    statement.close();
                }
                if (connection != null) {
                    connection.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}