An interface used by JdbcTemplate for mapping rows of a ResultSet on a per-row basis. Implementations of this interface perform the actual work of mapping each row to a result object but don't need to worry about exception handling. SQLExceptions will be caught and handled by the calling JdbcTemplate .

Typically used either for JdbcTemplate 's query methods or for out parameters of stored procedures. RowMapper objects are typically stateless and thus reusable; they are an ideal choice for implementing row-mapping logic in a single place.

Alternatively, consider subclassing MappingSqlQuery from the jdbc.object package: instead of working with separate JdbcTemplate and RowMapper objects, you can build executable query objects (containing row-mapping logic) in that style.

Implementations must implement this method to map each row of data in the ResultSet . This method should not call next() on the ResultSet ; it is only supposed to map values of the current row.