从java中的列sql中获取所有月份

// 导入所需的包
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        // JDBC连接信息
        String url = "jdbc:mysql://localhost:3306/database_name";
        String username = "username";
        String password = "password";

        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;

        try {
            // 连接数据库
            conn = DriverManager.getConnection(url, username, password);

            // 创建Statement对象
            stmt = conn.createStatement();

            // 执行SQL查询语句
            String sql = "SELECT DISTINCT DATE_FORMAT(date_column, '%Y-%m') AS month FROM table_name";
            rs = stmt.executeQuery(sql);

            // 提取查询结果
            List<String> months = new ArrayList<>();
            while (rs.next()) {
                String month = rs.getString("month");
                months.add(month);
            }

            // 输出结果
            for (String month : months) {
                System.out.println(month);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭连接和释放资源
            try {
                if (rs != null) {
                    rs.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}