postman调试地址：http://localhost:49461/api/contract/getContractToBeRead?domainId=1&budgetYear=2&flag=3

http://localhost:49461/：运行之后浏览器的地址

 [RoutePrefix("api/contract")]：类的路由

[Route("getContractToBeRead")]：方法的路由
[HttpGet]

webAPI