网站公安局备案 所需要的材料查询网站流量的网址
记录一下微信小程序支付
简介：微信小程序支付这里的坑还是有的，所以提醒各位在编写的一定要注意！！！
1.首先呢，你需要准备openid，appid，还有申请微信支付后要设置一个32位的密钥，需要先生成一个sign，得到prepay_id，然后再得到一个paySign，总之就是很墨迹，下面献上我的controller
//微信下单支付@ResponseBody@RequestMapping("doOrder")public void doOrder(HttpServletRequest request, HttpServletResponse response) throws IOException, JDOMException {request.setCharacterEncoding("UTF-8");response.setCharacterEncoding("UTF-8");//得到openidString openid = request.getParameter("openid");int fee = 0;//得到小程序传过来的价格，注意这里的价格必须为整数，1代表1分，所以传过来的值必须*100；if (null != request.getParameter("price")) {fee = Integer.parseInt(request.getParameter("price").toString());}System.out.println(request.getParameter("price"));System.out.println(fee);//订单编号String did = request.getParameter("did");//订单标题String title = request.getParameter("title");//时间戳String times = System.currentTimeMillis() + "";SortedMap<Object, Object> packageParams = new TreeMap<Object, Object>();packageParams.put("appid", "wxa**********2e2");packageParams.put("mch_id", "1486425722");packageParams.put("nonce_str", times);//时间戳packageParams.put("body", title);//支付主体packageParams.put("out_trade_no", did);//编号packageParams.put("total_fee", fee);//价格// packageParams.put("spbill_create_ip", getIp2(request));这里之前加了ip，但是总是获取sign失败，原因不明，之后就注释掉了packageParams.put("notify_url", base+"/notify");//支付返回地址，不用纠结这个东西，我就是随便写了一个接口，内容什么都没有packageParams.put("trade_type", "JSAPI");//这个api有，固定的packageParams.put("openid", openid);//openid//获取signString sign = PayCommonUtil.createSign("UTF-8", packageParams, "x********************************4");//最后这个是自己设置的32位密钥packageParams.put("sign", sign);//转成XMLString requestXML = PayCommonUtil.getRequestXml(packageParams);System.out.println(requestXML);//得到含有prepay_id的XMLString resXml = HttpUtil.postData("https://api.mch.weixin.qq.com/pay/unifiedorder", requestXML);System.out.println(resXml);//解析XML存入MapMap map = XMLUtil.doXMLParse(resXml);System.out.println(map);// String return_code = (String) map.get("return_code");//得到prepay_idString prepay_id = (String) map.get("prepay_id");SortedMap<Object, Object> packageP = new TreeMap<Object, Object>();packageP.put("appId", "wxa**********2e2");//！！！注意，这里是appId,上面是appid，真怀疑写这个东西的人。。。packageP.put("nonceStr", times);//时间戳packageP.put("package", "prepay_id=" + prepay_id);//必须把package写成 "prepay_id="+prepay_id这种形式packageP.put("signType", "MD5");//paySign加密packageP.put("timeStamp", (System.currentTimeMillis() / 1000) + "");//得到paySignString paySign = PayCommonUtil.createSign("UTF-8", packageP, "x********************************4");packageP.put("paySign", paySign);//将packageP数据返回给小程序Gson gson = new Gson();String json = gson.toJson(packageP);PrintWriter pw = response.getWriter();System.out.println(json);pw.write(json);pw.close();}
2.下面是需要用到的工具类
（1）.生成sign以及得到sign后生成XML工具类PayCommonUtil
public class PayCommonUtil {/** * 是否签名正确,规则是:按参数名称a-z排序,遇到空值的参数不参加签名。 * @return boolean */ public static boolean isTenpaySign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) { StringBuffer sb = new StringBuffer(); Set es = packageParams.entrySet(); Iterator it = es.iterator(); while(it.hasNext()) { Map.Entry entry = (Map.Entry)it.next(); String k = (String)entry.getKey(); String v = (String)entry.getValue(); if(!"sign".equals(k) && null != v && !"".equals(v)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + API_KEY); //算出摘要 String mysign = MD5.MD5Encode(sb.toString(), characterEncoding).toLowerCase(); String tenpaySign = ((String)packageParams.get("sign")).toLowerCase(); //System.out.println(tenpaySign + " " + mysign); return tenpaySign.equals(mysign); } /** * @author * @Description：sign签名 * @param characterEncoding * 编码格式 * @param parameters * 请求参数 * @return */ public static String createSign(String characterEncoding, SortedMap<Object, Object> packageParams, String API_KEY) { StringBuffer sb = new StringBuffer(); Set es = packageParams.entrySet(); Iterator it = es.iterator(); while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); String k = entry.getKey().toString(); String v = entry.getValue().toString(); if (null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + API_KEY); String sign = MD5.MD5Encode(sb.toString(), characterEncoding).toUpperCase(); return sign; } /** * @author * @Description：将请求参数转换为xml格式的string * @param parameters * 请求参数 * @return */ public static String getRequestXml(SortedMap<Object, Object> parameters) { StringBuffer sb = new StringBuffer(); sb.append("<xml>"); Set es = parameters.entrySet(); Iterator it = es.iterator(); while (it.hasNext()) { Map.Entry entry = (Map.Entry) it.next(); String k = entry.getKey().toString(); String v = entry.getValue().toString(); if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) { sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">"); } else { sb.append("<" + k + ">" + v + "</" + k + ">"); } } sb.append("</xml>"); return sb.toString(); } /** * 取出一个指定长度大小的随机正整数. * * @param length * int 设定所取出随机数的长度。length小于11 * @return int 返回生成的随机数。 */ public static int buildRandom(int length) { int num = 1; double random = Math.random(); if (random < 0.1) { random = random + 0.1; } for (int i = 0; i < length; i++) { num = num * 10; } return (int) ((random * num)); } /** * 获取当前时间 yyyyMMddHHmmss * * @return String */ public static String getCurrTime() { Date now = new Date(); SimpleDateFormat outFormat = new SimpleDateFormat("yyyyMMddHHmmss"); String s = outFormat.format(now); return s; }
}
（2）.访问官方接口得到含有prepay_id的XML工具类HttpUtil
public class HttpUtil {//private static final Log logger = Logs.get(); private final static int CONNECT_TIMEOUT = 5000; // in milliseconds private final static String DEFAULT_ENCODING = "UTF-8"; public static String postData(String urlStr, String data){ return postData(urlStr, data, null); } public static String postData(String urlStr, String data, String contentType){ BufferedReader reader = null; try { URL url = new URL(urlStr); URLConnection conn = url.openConnection(); conn.setDoOutput(true); conn.setConnectTimeout(CONNECT_TIMEOUT); conn.setReadTimeout(CONNECT_TIMEOUT); if(contentType != null) conn.setRequestProperty("content-type", contentType); OutputStreamWriter writer = new OutputStreamWriter(conn.getOutputStream(), DEFAULT_ENCODING); if(data == null) data = ""; writer.write(data); writer.flush(); writer.close(); reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), DEFAULT_ENCODING)); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line); sb.append("\r\n"); } return sb.toString(); } catch (IOException e) { //logger.error("Error connecting to " + urlStr + ": " + e.getMessage()); } finally { try { if (reader != null) reader.close(); } catch (IOException e) { } } return null; }
}
（3）.解析XML工具类
public class XMLUtil {public static Map doXMLParse(String strxml) throws JDOMException, IOException { strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\""); if(null == strxml || "".equals(strxml)) { return null; } Map m = new HashMap(); InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8")); SAXBuilder builder = new SAXBuilder(); Document doc = builder.build(in); Element root = doc.getRootElement(); List list = root.getChildren(); Iterator it = list.iterator(); while(it.hasNext()) { Element e = (Element) it.next(); String k = e.getName(); String v = ""; List children = e.getChildren(); if(children.isEmpty()) { v = e.getTextNormalize(); } else { v = XMLUtil.getChildrenText(children); } m.put(k, v); } //关闭流 in.close(); return m; } /** * 获取子结点的xml * @param children * @return String */ public static String getChildrenText(List children) { StringBuffer sb = new StringBuffer(); if(!children.isEmpty()) { Iterator it = children.iterator(); while(it.hasNext()) { Element e = (Element) it.next(); String name = e.getName(); String value = e.getTextNormalize(); List list = e.getChildren(); sb.append("<" + name + ">"); if(!list.isEmpty()) { sb.append(XMLUtil.getChildrenText(list)); } sb.append(value); sb.append("</" + name + ">"); } } return sb.toString(); }
}
（4）.MD5加密工具类
public class MD5 {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()));elseresultString = 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" };}
3.小程序支付向后台传输的参数
gopay: function () {
var that = this
wx.request({url: app.baseurl + 'doOrder',data: {'openid': wx.getStorageSync('openids'),'title': that.data.title,'did': that.data.did,'price': that.data.price*100},method: 'POST',header: {"content-type": 'application/x-www-form-urlencoded'},success: function (res) {console.log(res.data)console.log(res.data.timeStamp)console.log(res.data.nonceStr)console.log(res.data.package)console.log(res.data.paySign)wx.requestPayment({timeStamp: res.data.timeStamp,nonceStr: res.data.nonceStr,package: res.data.package,signType: res.data.signType,paySign: res.data.paySign,success: function (res) {wx.request({url: app.baseurl+'updateState',data: {'did': that.data.did,},method: 'GET',success:function(res){console.log(res.data)if(res.data==1){wx.redirectTo({url: '../orderDetial/orderDetial?did=' + that.data.did,})}}})},fail: function (res) {console.log(res)}})}
})}
结束啦，小程序支付的java后台就这些。