+ "bu_user.password = password(:password)";
Map<String, String> map = new HashMap<String, String>();
map.put("userName", userName);
map.put("password", password);
SqlParameterSource paramMap = new MapSqlParameterSource(map);
RowMapper<User> mapper = new UserMapper();
try{
return (User) namedParameterJdbcTemplate.queryForObject(sql, paramMap, mapper);
}catch (EmptyResultDataAccessException e){
return null;
}