支付宝支付return

支付宝支付return"/>

支付宝支付return

alipay.trade.page.pay.jsp中设定alipayRequest的bizContent内容如下：

​String bizContent="{\"out_trade_no\":\""+ out_trade_no +"\","+ "\"total_amount\":\""+ total_amount +"\","+ "\"subject\":\""+ subject +"\","+ "\"body\":\""+ body +"\","+ "\"goods_type\":\""+ id +"\","+ "\"merchant_order_no\":\""+ kind +"\","       //     + "\"goods_detail\":[{\"goods_id\":\""+ id +"\",\"goods_name\":\""+ kind +"\"}],"     + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}";alipayRequest.setBizContent(bizContent);[点击并拖拽以移动]
​

那么在return_url.jsp中如何调用"goods_type"的值呢？好像支付成功后，get方式调用return_url.jsp只传递了前三个参数，后面参数都没传递过来，也不知道怎么调用？