微信支付填坑笔记

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后台下载的代码中MyConfig中getKey()是在商户平台下的API KEY，而不是应用的AppSecret！！！ 2、微信通过 wxpay.unifiedOrder(data);下单之后要进行二次签名，文档写得跟屎一样，不仔细看根本发现不了要进行这一步！！！ long timestamp = Calendar.getInstance().getTimeInMillis() / 1000; SortedMap parameters = new TreeMap<>(); parameters.put("appid",appid); parameters.put("partnerid",mchId); parameters.put("prepayid",prepayId); parameters.put("noncestr",nonceStr); parameters.put("timestamp",String.valueOf(timestamp)); parameters.put("package","Sign=WXPay"); // 二次签名 sign = createSign("UTF-8",parameters); ============================================================================================ public String createSign(String characterEncoding,SortedMap parameters) { StringBuffer sb = new StringBuffer(); Set es = parameters.entrySet();// 所有参与传参的参数按照accsii排序（升序） Iterator it = es.iterator(); while (it.hasNext()) { @SuppressWarnings("rawtypes") Map.Entry entry = (Map.Entry) it.next(); String k = (String) entry.getKey(); Object v = entry.getValue(); if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + weixinPayKey); //KEY是商户秘钥 String sign = MD5Util.MD5Encode(sb.toString(),characterEncoding) .toUpperCase(); return sign; // D3A5D13E7838E1D453F4F2EA526C4766 // D3A5D13E7838E1D453F4F2EA526C4766 } ====================================================================================== public class MD5Util { private static String byteArrayToHexString(byte b[]) { StringBuffer resultSb = new StringBuffer(); for (int i = 0; i < b.length; i++) resultSb.append(byteToHexString(b[i])); return resultSb.toString(); } private static String byteToHexString(byte b) { int n = b; if (n < 0) n += 256; int d1 = n / 16; int d2 = n % 16; return hexDigits[d1] + hexDigits[d2]; } public static String MD5Encode(String origin,String charsetname) { String resultString = null; try { resultString = new String(origin); MessageDigest md = MessageDigest.getInstance("MD5"); if (charsetname == null || "".equals(charsetname)) resultString = byteArrayToHexString(md.digest(resultString .getBytes())); else resultString = byteArrayToHexString(md.digest(resultString .getBytes(charsetname))); } catch (Exception exception) { } return resultString; } private static final String hexDigits[] = {"0","1","2","3","4","5", "6","7","8","9","a","b","c","d","e","f"}; } 参考地址： http://blog.csdn.net/sinat_17820239/article/details/51334181 http://blog.csdn.net/zhou114108/article/details/52438846 https://pay.weixin.qq.com/wiki/doc/api/app/app.PHP?chapter=4_3 http://blog.csdn.net/xb12369/article/details/45716665 原文链接：https://www.f2er.com/weapp/416623.html

微信支付填坑笔记

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