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## org.springframework.jdbc.core
Interface RowMapper

All Known Subinterfaces:
  ParameterizedRowMapper<T>

All Known Implementing Classes:
  ColumnMapRowMapper, MappingSqlQueryWithParameters.RowMapperImpl, SingleColumnRowMapper, UpdatableSqlQuery.RowMapperImpl

    public interface RowMapper

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.

Author:
  Thomas Risberg, Juergen Hoeller
See Also:
  `JdbcTemplate`, `RowCallbackHandler`, `ResultSetExtractor`, `MappingSqlQuery`

Method Summary
`Object` | `mapRow(ResultSet rs, int rowNum)` Implementations must implement this method to map each row of data in the ResultSet.

Method Detail

### mapRow

    Object mapRow(ResultSet rs,
                  int rowNum)
                  throws SQLException

  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.

  Parameters:
    `rs` - the ResultSet to map (pre-initialized for the current row)
    `rowNum` - the number of the current row
  Returns:
    the result object for the current row
  Throws:
    `SQLException` - if a SQLException is encountered getting column values (that is, there's no need to catch SQLException)

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