确保jdbctemplate中返回的列的顺序

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

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

public class CustomResultSetExtractor implements ResultSetExtractor<List<MyObject>> {

    @Override
    public List<MyObject> extractData(ResultSet rs) throws SQLException {
        List<MyObject> result = new ArrayList<>();

        while (rs.next()) {
            MyObject obj = new MyObject();
            obj.setColumn1(rs.getString("column1"));
            obj.setColumn2(rs.getString("column2"));
            // 继续设置其他列的值

            result.add(obj);
        }

        return result;
    }
}

// 使用自定义的ResultSetExtractor
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource);
String sql = "SELECT column1, column2 FROM my_table";
List<MyObject> objects = jdbcTemplate.query(sql, new CustomResultSetExtractor());