API地址：https://api.mch.weixin.qq.com/sandboxnew/pay/unifiedorder 参数： {     "mch_id": "********",     "nonce_str": "nOYrVIediGCM7o99",     "notify_url": "https://******",     "out_trade_no": "1349979966031732736",     "total_fee": "101",     "body": "测试1349979966031732736",     "openid": "***********",     "appid": "*********",     "trade_type": "JSAPI",     "sign": "97EE8AD23DF6D34D376020D84B845F43" } 接口返回： {     "@attributes": {         "lang": "zh-cn"     },     "head": {         "meta": {             "@attributes": {                 "charset": "UTF-8"             }         },         "title": "公益404"     },     "body": {         "script": {             "@attributes": {                 "type": "text/javascript",                 "src": "//qzonestyle.gtimg.cn/qzone/hybrid/app/404/search_children.js",                 "charset": "utf-8"             }         }     } }