java查mysql表的元数据

import java.sql.*;

public class MetadataExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            DatabaseMetaData metaData = conn.getMetaData();
            ResultSet tables = metaData.getTables(null, null, "%", new String[] {"TABLE"});

            while (tables.next()) {
                String tableName = tables.getString("TABLE_NAME");
                System.out.println("Table Name: " + tableName);

                ResultSet columns = metaData.getColumns(null, null, tableName, "%");
                while (columns.next()) {
                    String columnName = columns.getString("COLUMN_NAME");
                    String dataType = columns.getString("TYPE_NAME");
                    System.out.println("  Column Name: " + columnName + ", Data Type: " + dataType);
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}