FileInputStream fs = new FileInputStream("D://t.txt");
            ((PGConnection)con).getCopyAPI().copyIntoDB("COPY table1 FROM STDIN", fs);
            fs.close();

org.postgresql.util.PSQLException: ERROR: invalid byte sequence for encoding "UTF8": 0xa0

set client_encoding to WIN866;
copy table1 from 'd://t.txt';

            Properties props = new Properties();
            props.setProperty("charSet","WIN866");
            props.setProperty("allowEncodingChanges","true");
            Connection con = DriverManager.getConnection(url, props);