Java.sql.SQLException: Parameter index out of range 2> 1

Question

I have been getting this error and I don't know what is causing it.

This is a simple email auto reply java that I came up with. I will connect to a database which has two columns in the table. rEmail and sEmail, receiver ... sender.

So if the receiver and sender matches the check that I have done for my java code.. it will auto reply an email but I kept getting this SQL error which I have no idea what is it about.. Below is my codes..

public class TestList
  extends TestMatch
{

  private Collection senders;

  public void init()
    throws MessagingException
  {

  }

  public Collection match(Mail mail) throws MessagingException
  {
Connection conn = null;
Statement stmt = null;
try
{
  Class.forName("com.mysql.jdbc.Driver");

  conn = DriverManager.getConnection("jdbc:mysql://localhost/mail", "root", "password");

  stmt = conn.createStatement();

  String receiver = mail.getRecipients().toString();
  String sender = mail.getSender().toString();

  String receiverResult = receiver.substring(receiver.indexOf("[") + 1, receiver.indexOf("]"));

  String sql = "SELECT senderEmail FROM TestList where rEmail='"+ rResult +"'" + " AND sEmail='"+sender+"'";
  System.out.println("SQL ERROR Here -- 31");

  ResultSet rs = stmt.executeQuery(sql);

  this.senders = new HashSet();
  while (rs.next()) {
    this.senders.add(new MailAddress(rs.getString("sEmail")));
  }

  rs.close();
  stmt.close();
  conn.close(); 
}
catch (SQLException se)
{
  se.printStackTrace();
}
catch (Exception e)
{
  e.printStackTrace();
}
finally
{
  try
  {
    if (stmt != null) {
      stmt.close();
    }
  }
  catch (SQLException se2) {}
  try
  {
    if (conn != null) {
      conn.close();
    }
  }
  catch (SQLException se)
  {
    se.printStackTrace();
  }
}   
    System.out.println("SQL ERROR Here -- 72);
if (this.senders.contains(mail.getSender())) {  
    System.out.println("SQL ERROR Here -- 74");
    Properties props = new Properties();
    Session session = Session.getDefaultInstance(props);
    MimeMessage msg = new MimeMessage(session);

        System.out.println("auto reply");
        msg.setSubject ("subject");
        msg.setSender (new InternetAddress("Postmaster@test.com"));
        msg.setRecipient(Message.RecipientType.TO,(new InternetAddress("user1@captcha.com")));
        msg.setText ("describe the mail text of","utf-8","Plain");
        Transport.send(msg);
        System.out.println("e-mail sent.");

  return mail.getRecipients();
} else {
return null;
}
  }
}

This thing will run twice, and I do not know exactly why also. At first everything will go smoothly until email sent and then it will repeat once more and stop at SQL error --72.

I have been trying to figure this out for days so can someone please help?

===== UPDATE NEW ERROR after using rs.getString(1) or rs.getString(2);

`SQL ERROR Here -- line 31
 java.sql.SQLException: Column Index out of range, 2 > 1.
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
    at com.mysql.jdbc.ResultSetImpl.checkColumnBounds(ResultSetImpl.java:818)
    at com.mysql.jdbc.ResultSetImpl.getStringInternal(ResultSetImpl.java:5651)
    at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5570)
    at org.apache.james.transport.matchers.SenderIsGreyList.match(SenderIsGreyList.java:59)
    at org.apache.james.transport.LinearProcessor.service(LinearProcessor.java:357)
    at org.apache.james.transport.JamesSpoolManager.process(JamesSpoolManager.java:405)
    at org.apache.james.transport.JamesSpoolManager.run(JamesSpoolManager.java:309)
    at java.lang.Thread.run(Thread.java:745)
SQL ERROR Here -- line 72`

Answer 1

Looks like you're attempting to retrieve column named "sEmail" from rows in the resultset...

  rs.getString("sEmail")

But your query doesn't return a column of that name. The SELECT statement returns a column named "senderEmail".

I always use numeric. Use 1 to get the first column, eg

  rs.getString(1)