RowMapperResultSetExtractor的使用？

spring的jdbc支持中，2.0中RowMapperResultSetExtractor 替换1.0中 RowMapperResultReader 但是用法基本一样，以下是个例子： dbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); // reusable object RowMapper rowMapper = new UserRowMapper(); // reusable object

List allUsers = (List) jdbcTemplate.query("select * from user",new RowMapperResultSetExtractor(rowMapper, 10));

User user = (User) jdbcTemplate.queryForObject("select * from user where id=?", new Object[] {id}, new RowMapperResultSetExtractor(rowMapper, 1)); //其中UserRowMapper可以这么实现： public class UserRowMapper implements RowMapper {

 public Object mapRow(ResultSet rs, int index) throws SQLException {  
     // TODO Auto-generated method stub  
     User user=new User();  
    user.setId(rs.getString("001"));  
    user.setPassword(rs.getString("xxx"));  
    return user;  
 }  

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