json文件
{"stock_hold_cycle":205,"end_date":"20170601","fare":0.0,"cost":0.0,"sell_balance":0.0,"user_id":"100000877","begin_date":"20160819","fund_account":"100000877","stock_code":"603031","buy_balance":0.0}
{"stock_hold_cycle":261,"end_date":"20170601","fare":0.0,"cost":0.0,"sell_balance":0.0,"user_id":"100000877","begin_date":"20160602","fund_account":"100000877","stock_code":"732031","buy_balance":0.0