> The JDBC drivers will handle all the conversion. > Do NOT manually convert the data.
Yeah, I agree this is the right answer here, since you're using JDBC. By the time you get a String from the MySQL driver, it's already in Java's 2-bytes-per-char format. And the Postgres driver will deal with the encoding on the output side. So the code I provided won't help you. I'm afraid I don't know about Mybatis, but if it's built on JDBC I'd think you've just got a configuration problem with what encoding the client expects at either end.