c如何和mysql连接数据库

import java.sql.*;

public class MySQLConnectionExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/database_name?user=username&password=password";
        String query = "SELECT * FROM table_name";

        try (Connection conn = DriverManager.getConnection(url);
             Statement stmt = conn.createStatement();
             ResultSet rs = stmt.executeQuery(query)) {
            while (rs.next()) {
                // 处理查询结果
                String column1 = rs.getString("column1");
                int column2 = rs.getInt("column2");
                // ...
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}