Get Column Names From ResultSet : Database « Servlets « Java
Get Column Names From ResultSet
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
public class GetColumnNamesFromResultSetMySQL {
public static void getColumnNames(ResultSet rs) throws SQLException {
if (rs == null) {
return;
}
ResultSetMetaData rsMetaData = rs.getMetaData();
int numberOfColumns = rsMetaData.getColumnCount();
// get the column names; column indexes start from 1
for (int i = 1; i < numberOfColumns + 1; i++) {
String columnName = rsMetaData.getColumnName(i);
// Get the name of the column's table name
String tableName = rsMetaData.getTableName(i);
System.out.println("column name=" + columnName + " table=" + tableName);
}
}
public static void main(String[] args) throws Exception {
Connection conn = getMySqlConnection();
Statement stmt = null;
ResultSet rs = null;
String query = "select id, name, age from employees";
stmt = conn.createStatement();
rs = stmt.executeQuery(query);
getColumnNames(rs);
rs.close();
stmt.close();
conn.close();
}
public static Connection getMySqlConnection() throws Exception {
String driver = "org.gjt.mm.mysql.Driver";
String url = "jdbc:mysql://localhost/octopus";
String username = "root";
String password = "root";
Class.forName(driver); // load MySQL driver
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
public static Connection getOracleConnection() throws Exception {
String driver = "oracle.jdbc.driver.OracleDriver";
String url = "jdbc:oracle:thin:@localhost:1521:databaseName";
String username = "username";
String password = "password";
Class.forName(driver); // load Oracle driver
Connection conn = DriverManager.getConnection(url, username, password);
return conn;
}
}
