T - the result type@FunctionalInterface public interface RowMapper<T>
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.
JdbcTemplate,
RowCallbackHandler,
ResultSetExtractor,
MappingSqlQuery| Modifier and Type | Method and Description |
|---|---|
T |
mapRow(ResultSet rs,
int rowNum)
Implementations must implement this method to map each row of data in the
ResultSet. |
@Nullable T mapRow(ResultSet rs, int rowNum) throws SQLException
ResultSet. This method should not call next() on the
ResultSet; it is only supposed to map values of the current row.rs - the ResultSet to map (pre-initialized for the current row)rowNum - the number of the current rownull)SQLException - if an SQLException is encountered while getting
column values (that is, there's no need to catch SQLException)