Print the data in ResultSet along with column names

Question

I am retrieving columns names from a SQL database through Java. I know I can retrieve columns names from ResultSet too. So I have this sql query

 select column_name from information_schema.columns where table_name='suppliers' 

The problem is I don't know how can I get columns names from ResultSet and my code is

public void getAllColumnNames() throws Exception{  String sql = "SELECT column_name from information_schema.columns where table_name='suppliers'";  PreparedStatement ps = connection.prepareStatement(sql); ResultSet rs = ps.executeQuery(sql);  // extract values from rs   } 

Answer 1

ResultSet resultSet = statement.executeQuery("SELECT * from foo"); ResultSetMetaData rsmd = resultSet.getMetaData(); int columnsNumber = rsmd.getColumnCount(); while (resultSet.next()) {     for (int i = 1; i <= columnsNumber; i++) {         if (i > 1) System.out.print(",  ");         String columnValue = resultSet.getString(i);         System.out.print(columnValue + " " + rsmd.getColumnName(i));     }     System.out.println(""); } 

Reference : Printing the result of ResultSet

Answer 2

1) Instead of PreparedStatement use Statement

2) After executing query in ResultSet, extract values with the help of rs.getString() as :

Statement st=cn.createStatement(); ResultSet rs=st.executeQuery(sql); while(rs.next()) {     rs.getString(1); //or rs.getString("column name"); }