JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?
What I think is that somebody realized that the queryForInt/Long methods has confusing semantics, that is, from JdbcTemplate source code you can see its current implementation:
@Deprecated
public int queryForInt(String sql, Object... args) throws DataAccessException {
Number number = queryForObject(sql, args, Integer.class);
return (number != null ? number.intValue() : 0);
}
which may lead you to think that if the result set is empty it will return 0, however it throws an exception:
org.springframework.dao.EmptyResultDataAccessException: Incorrect result size: expected 1, actual 0
so the the following implementation is essentially equivalent to the current one:
@Deprecated
public int queryForInt(String sql, Object... args) throws DataAccessException {
return queryForObject(sql, args, Integer.class);
}
And then the non deprecated code now must be replaced with the ugly:
queryForObject(sql, new Object { arg1, arg2, ...}, Integer.class);
or this (nicer):
queryForObject(sql, Integer.class, arg1, arg2, ...);
I agree with the original poster that deprecating the convenience method queryForLong(sql) is an inconvenience.
I had developed an app using Spring 3.1 and just updated to the latest Spring version (3.2.3) and noticed that it was deprecated.
Fortunately, it was a one line change for me:
return jdbcTemplate.queryForLong(sql); // deprecated in Spring 3.2.x
was changed to
return jdbcTemplate.queryForObject(sql, Long.class);
And a couple of Unit Tests seem to indicate, the above change works.
Deprecated in favor of queryForObject(String, Class)
.