用Httpclient 发送 get请求返回与postman不一致

用httpclient做接口测试：

Response is :{"traceId":"********","Value":{"cartProductVoList":[{"image":"*******","amount":99.0,"productGroupID":"","pricebookProductDiscount":"100","unit":"块","userDefine":"{}","pricebookPrice":4.0,"isDeleted":false,"price":4.0,"specVos":[],"name":"中学写字笔","id":"91d9568eb242485fbd1ac5ca2e65505d","status":1}]},"Result":{"UserInfo":{}}}

同样的参数，用postman请求和抓包返回的都是amount 都是整数：