SortedMap<String, String> tunemap = new TreeMap<String, String>(); tunemap.put("appid",params.get("appid")); tunemap.put("partnerid",params.get("mch_id")); tunemap.put("prepayid",params.get("prepay_id")); tunemap.put("package","Sign=WXPay"); tunemap.put("noncestr",params.get("nonce_str")); tunemap.put("timestamp",String.valueOf(System.currentTimeMillis()/1000)); String tunemapsign = PayCommonUtil.createSign("utf-8", tunemap, key); tunemap.put("sign", tunemapsign); 我查看了没有错误，签名方式都一样