用内部类初始化 对象

public class UserDAO {

public List<User> loadUsers(final int id) {
final UserBuilder userBuilder = new UserBuilder();
getJdbcTemplate().query(selectSql, new Object[] { id }, userBuilder);
return userBuilder.getUserList();
}

class UserBuilder implements RowCallbackHandler {
private transient final List<User> userList = new ArrayList<User>();

@Override
public void processRow(final ResultSet rs) throws SQLException {
final User user = new User();

user.setName(rs.getString("name"));

userList.add(user);
}

public List<User> getUserList() {
return userList;
}
}

}