JdbcTemplate's query methods.
Implementations of this interface perform the actual work of extracting
results from a java.sql.ResultSet , but don't need to worry
about exception handling. SQLExceptions
will be caught and handled by the calling JdbcTemplate.
This interface is mainly used within the JDBC framework itself.
A RowMapper is usually a simpler choice for ResultSet processing,
mapping one result object per row instead of one result object for
the entire ResultSet.
Note
In contrast to a RowCallbackHandler, a ResultSetExtractor
object is typically stateless and thus reusable, as long as it doesn't
access stateful resources (such as output streams when streaming LOB
contents) or keep result state within the object.
JdbcTemplate, RowCallbackHandler, RowMapper, org.springframework.jdbc.core.support.AbstractLobStreamingResultSetExtractor
| Modifier and Type | Method and Description |
|---|---|
| public T | Returns: an arbitrary result object, ornull if none
(the extractor will typically be stateful in the latter case).the ResultSet to extract data from. Implementations should
not close this: it will be closed by the calling JdbcTemplate. rs)Implementations must implement this method to process the entire ResultSet. |
| extractData | back to summary |
|---|---|
| public T extractData(ResultSet rs) throws SQLException, DataAccessException Implementations must implement this method to process the entire ResultSet.
| |