JSON这种格式的怎么取成员数

百步穿杨994

[{"accountAlias":"fWAuFzSgTiFzuX","asset":"FDUSD","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":0},{"accountAlias":"fWAuFzSgTiFzuX","asset":"LDUSDT","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":0},{"accountAlias":"fWAuFzSgTiFzuX","asset":"BFUSD","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":0},{"accountAlias":"fWAuFzSgTiFzuX","asset":"BNB","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":0},{"accountAlias":"fWAuFzSgTiFzuX","asset":"ETH","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":0},{"accountAlias":"fWAuFzSgTiFzuX","asset":"BTC","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":0},{"accountAlias":"fWAuFzSgTiFzuX","asset":"USDT","balance":"0.00000000","crossWalletBalance":"0.00000000","crossUnPnl":"0.00000000","availableBalance":"0.00000000","maxWithdrawAmount":"0.00000000","marginAvailable":true,"updateTime":1743984766774},{"accountAlias":"fWAuFzSgTiFzuX","asset":"USDC","balance":"614.14256312","crossWalletBalance":"614.14256312","crossUnPnl":"0.00000000","availableBalance":"614.14256312","maxWithdrawAmount":"614.14256312","marginAvailable":true,"updateTime":1744365040542}]

刘文明乌猛

成员数=json.成员数 ()

zzz7406

属性名空着就行