废话不多。

mapper

@Select("${sqlStr}")
    List<MyTest> dynamicSql(@Param("sqlStr")String sql);

测试

@Autowired
    MyTestMapper myTestMapper;

    @Test
    public void DynamicSql()
    {
        String sql="select * from myTest";
        List<MyTest> list =  myTestMapper.dynamicSql(sql);
    }