Convert Clob to String in Java

import java.sql.Clob;


private String clobToStringConversion(Clob clb) throws IOException, SQLException {
        if (clb == null) {
            return null;
        }
        StringBuffer str = new StringBuffer();
        String data = null;
        BufferedReader bufferRead = new BufferedReader(clb.getCharacterStream());
        while ((data = bufferRead.readLine()) != null) {
            str.append(data);
        }
        return str.toString();
    }