如何使用spring jdbc模板从拥有数百万条记录的表中获取数据

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

public class UserDao {
    private JdbcTemplate jdbcTemplate;

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    public List<User> getAllUsers() {
        String sql = "SELECT * FROM user";
        return jdbcTemplate.query(sql, new UserRowMapper());
    }

    private class UserRowMapper implements RowMapper<User> {
        @Override
        public User mapRow(ResultSet rs, int rowNum) throws SQLException {
            User user = new User();
            user.setId(rs.getInt("id"));
            user.setName(rs.getString("name"));
            // 其他字段的映射
            return user;
        }
    }
}