基于ssm框架进行数据动态更换字段和表名查询

Dao层 

//设置单独传两个参

List<Main>  selectDynamicMain(@Param("columns") String columns, @Param("tableName") String tableName);
Mapper层

<!-- 动态字段 sql进行查询-->
<select id="selectDynamicMain" parameterType="Entity.Main" resultMap="MainResultMap" statementType="STATEMENT">
    select ${columns} from ${tableName}
</select>

Controller层

List<Main> mainData = service.selectDynamicMain(mainStr, main);