mybatis如何让列名当参数 不带引号的

SELECT MAX(s1) from table

action代码
for (int i = 1; i <= sensorNumber; i++) {
String name = "s"+ i;
Integer sensorMax = ms.findSensorMax(name);
System.out.println(sensorMax);
}

如何让传到xml的s1不带引号

SELECT MAX(${s1}) from table;