PSQLException: ResultSet not positioned properly, perhaps you need to call next

Question

public UserBean authenticate(String username,String password){
    PostGresDAO pg=new PostGresDAO();   //creates new connection
    Connection conn=pg.getConnecion()         


        

Answer 1

The error is telling you exactly what's wrong - you're not calling next() on your ResultSet to get to the first row of the results.

This line:

if(rs!=null)

is pointless as far as I know; I don't believe executeQuery will ever return null. If there's a problem in your query, an exception will be thrown. If there are no results, it will return an empty result set. To see if there's a row, you should call next() and check the return value:

if (rs.next())

Additionally:

• Catching an exception and just printing the stack trace without rethrowing is almost always the wrong approach
• Your code suggests that you're storing passwords in plain text. Please don't. Really, really don't.