最近做的游戏公众号项目需要实现在微信公众号网页进行支付,虽然是一个小的功能,初次接触支付还是犯了很多错误,在此记录一下大体的开发流程。
例如我的支付页面请求路径是http://www.xxxxx.com/wxpay/jsPay/getPayPage,
需要配置的JSAPI支付授权目录就是:http://www.xxxxx.com/wxpay/jsPay/,后边的统一下单接口也必须在这个目录下
格式:http://www.xxxxx.com/wxpay/jsPay/ (注:域名后必须至少配置两层路径)
下面是后台请求支付授权参数代码:
接口:
public void wxPay(){
String gamePlayId = getPara("gamePlayId");
String userId = getPara("userId");
BizOrder userOrder = new BizOrder();
userOrder.setCreateTime(new Date());
userOrder.setGamePlayId(gamePlayId);
userOrder.setTotalFee(0.01F);
userOrder.setUserId(userId);
userOrder.save();
Map map = null;
try {
//统一下单,调用工具类请求下单方法,返回xml,用return_code判断统一下单结果,获取prepay_id等预支付成功信息
String prePayInfoXml = WxPayUtil.unifiedOrder("PRO版报告", System.currentTimeMillis() + WxPayUtil.getNonceStr6(),
(new BigDecimal(userOrder.getTotalFee().toString()).multiply(new BigDecimal(100))).intValue(),
WxPayUtil.getIpAddr(getRequest()), getSessionAttr("openId").toString(),gamePlayId);
//生成包含prepay_id的map,map传入前端
log.info(prePayInfoXml);
map = WxPayUtil.getPayMap(prePayInfoXml);
//将订单号放入map,用以支付后处理
map.put("orderNo", userOrder.getId());
System.out.println("支付授权参数:"+JSON.toJSONString(map));
}catch (Exception e){
log.error(e.getMessage());
}
renderJson(map);
}
工具类:
public class WxPayUtil {
private static Logger logger = Logger.getLogger(WxPayUtil.class);
/**
* 根据code获取openid
* @param code
* @return
* @throws IOException
*/
public static Map getOpenIdByCode(String code) throws IOException {
//请求该链接获取access_token
HttpPost httppost = new HttpPost("https://api.weixin.qq.com/sns/oauth2/access_token");
//组装请求参数
String reqEntityStr = "appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code";
reqEntityStr = reqEntityStr.replace("APPID", WXConstant.APPID);
reqEntityStr = reqEntityStr.replace("SECRET", WXConstant.APP_SECRET);
reqEntityStr = reqEntityStr.replace("CODE", code);
StringEntity reqEntity = new StringEntity(reqEntityStr);
//设置参数
httppost.setEntity(reqEntity);
//设置浏览器
CloseableHttpClient httpclient = HttpClients.createDefault();
//发起请求
CloseableHttpResponse response = httpclient.execute(httppost);
//获得请求内容
String strResult = EntityUtils.toString(response.getEntity(), Charset.forName("utf-8"));
//获取openid
JSONObject jsonObject = JSON.parseObject(strResult);
Map map = new HashMap();
map.put("openid",jsonObject.get("openid"));
map.put("access_token",jsonObject.get("access_token"));
map.put("refresh_token",jsonObject.get("refresh_token"));
return map;
}
/**
* 统一下单
* @param body 商品描述
* @param out_trade_no 商户订单号,自定义,一般为时间戳+6位随机字符串
* @param total_fee 商品总价,单位为分
* @param IP APP和网页支付提交用户端ip地址
* @param openid 用户在本公众号的唯一标识
* @param gamePlayId 附加数据信息,对应attach参数,根据自己业务需要
* @return
* @throws IOException
*/
public static String unifiedOrder(String body,String out_trade_no,Integer total_fee,String IP,String openid,String gamePlayId)throws IOException {
//设置访问路径
HttpPost httppost = new HttpPost("https://api.mch.weixin.qq.com/pay/unifiedorder");
String nonce_str = getNonceStr().toUpperCase();//随机
//组装请求参数,按照ASCII排序
String sign = "appid=" + WXConstant.APPID +
"&attach=" + gamePlayId +
"&body=" + body +
"&mch_id=" + WXConstant.MCH_ID +
"&nonce_str=" + nonce_str +
"¬ify_url=" + WXConstant.NOTIFY_URL+
"&openid=" + openid +
"&out_trade_no=" + out_trade_no +
"&spbill_create_ip=" + IP +
"&total_fee=" + total_fee.toString() +
"&trade_type=" + WXConstant.TRADE_TYPE_JS +
"&key=" + WXConstant.KEY;//这个字段是用于之后MD5加密的,字段要按照ascii码顺序排序
sign = MD5Util.getMD5(sign).toUpperCase();
//组装包含openid用于请求统一下单返回结果的XML
StringBuilder sb = new StringBuilder("");
sb.append("");
setXmlKV(sb,"appid",WXConstant.APPID);
setXmlKV(sb,"attach",gamePlayId);
setXmlKV(sb,"body",body);
setXmlKV(sb,"mch_id",WXConstant.MCH_ID);
setXmlKV(sb,"nonce_str",nonce_str);
setXmlKV(sb,"notify_url",WXConstant.NOTIFY_URL);
setXmlKV(sb,"openid",openid);
setXmlKV(sb,"out_trade_no",out_trade_no);
setXmlKV(sb,"spbill_create_ip",IP);
setXmlKV(sb,"total_fee",total_fee.toString());
setXmlKV(sb,"trade_type",WXConstant.TRADE_TYPE_JS);
setXmlKV(sb,"sign",sign);
sb.append(" ");
System.out.println("统一下单请求:" + sb);
StringEntity reqEntity = new StringEntity(new String (sb.toString().getBytes("UTF-8"),"ISO8859-1"));//这个处理是为了防止传中文的时候出现签名错误
httppost.setEntity(reqEntity);
CloseableHttpClient httpclient = HttpClients.createDefault();
CloseableHttpResponse response = httpclient.execute(httppost);
String strResult = EntityUtils.toString(response.getEntity(), Charset.forName("utf-8"));
System.out.println("统一下单返回xml:" + strResult);
return strResult;
}
/**
* XML-->MAP 根据统一下单返回预支付订单的id和其他信息生成签名并拼装为map(调用微信支付)
* @param prePayInfoXml
* @return
*/
public static Map getPayMap(String prePayInfoXml){
Map map = new HashMap();
String prepay_id = getXmlPara(prePayInfoXml,"prepay_id");//统一下单返回xml中prepay_id
String timeStamp = String.valueOf((System.currentTimeMillis()/1000));//1970年到现在的秒数
String nonceStr = getNonceStr().toUpperCase();//随机数据字符串
String packageStr = "prepay_id=" + prepay_id;
String signType = "MD5";
String paySign =
"appId=" + WXConstant.APPID +
"&nonceStr=" + nonceStr +
"&package=prepay_id=" + prepay_id +
"&signType=" + signType +
"&timeStamp=" + timeStamp +
"&key="+ WXConstant.KEY;//注意这里的参数要根据ASCII码 排序
paySign = MD5Util.getMD5(paySign).toUpperCase();//将数据MD5加密
map.put("appId",WXConstant.APPID);
map.put("timeStamp",timeStamp);
map.put("nonceStr",nonceStr);
map.put("packageStr",packageStr);
map.put("signType",signType);
map.put("paySign",paySign);
map.put("prepay_id",prepay_id);
return map;
}
/**
* 修改订单状态,获取微信回调结果
* @param request
* @return
*/
public static String getNotifyResult(HttpServletRequest request){
String inputLine;
String notifyXml = "";
String resXml = "";
try {
while ((inputLine = request.getReader().readLine()) != null){
notifyXml += inputLine;
}
request.getReader().close();
} catch (Exception e) {
logger.debug("xml获取失败:" + e);
e.printStackTrace();
}
System.out.println("接收到的xml:" + notifyXml);
logger.debug("收到微信异步回调:");
logger.debug(notifyXml);
if(StrKit.notBlank(notifyXml)){
logger.debug("xml为空:");
}
String appid = getXmlPara(notifyXml,"appid");;
String bank_type = getXmlPara(notifyXml,"bank_type");
String cash_fee = getXmlPara(notifyXml,"cash_fee");
String fee_type = getXmlPara(notifyXml,"fee_type");
String is_subscribe = getXmlPara(notifyXml,"is_subscribe");
String mch_id = getXmlPara(notifyXml,"mch_id");
String nonce_str = getXmlPara(notifyXml,"nonce_str");
String openid = getXmlPara(notifyXml,"openid");
String out_trade_no = getXmlPara(notifyXml,"out_trade_no");
String result_code = getXmlPara(notifyXml,"result_code");
String return_code = getXmlPara(notifyXml,"return_code");
String sign = getXmlPara(notifyXml,"sign");
String time_end = getXmlPara(notifyXml,"time_end");
String total_fee = getXmlPara(notifyXml,"total_fee");
String trade_type = getXmlPara(notifyXml,"trade_type");
String transaction_id = getXmlPara(notifyXml,"transaction_id");
//根据返回xml计算本地签名
String localSign =
"appid=" + appid +
"&bank_type=" + bank_type +
"&cash_fee=" + cash_fee +
"&fee_type=" + fee_type +
"&is_subscribe=" + is_subscribe +
"&mch_id=" + mch_id +
"&nonce_str=" + nonce_str +
"&openid=" + openid +
"&out_trade_no=" + out_trade_no +
"&result_code=" + result_code +
"&return_code=" + return_code +
"&time_end=" + time_end +
"&total_fee=" + total_fee +
"&trade_type=" + trade_type +
"&transaction_id=" + transaction_id +
"&key=" + WXConstant.KEY;//注意这里的参数要根据ASCII码 排序
localSign = MD5Util.getMD5(localSign).toUpperCase();//将数据MD5加密
System.out.println("本地签名是:" + localSign);
logger.debug("本地签名是:" + localSign);
logger.debug("微信支付签名是:" + sign);
//本地计算签名与微信返回签名不同||返回结果为不成功
if(!sign.equals(localSign) || !"SUCCESS".equals(result_code) || !"SUCCESS".equals(return_code)){
System.out.println("验证签名失败或返回错误结果码");
logger.error("验证签名失败或返回错误结果码");
resXml = "" + " " + " " + " ";
}else{
System.out.println("支付成功");
logger.debug("公众号支付成功,out_trade_no(订单号)为:" + out_trade_no);
resXml = "" + " " + " " + " ";
}
return resXml;
}
/**
* 获取32位随机字符串
* @return
*/
public static String getNonceStr(){
String str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
StringBuilder sb = new StringBuilder();
Random rd = new Random();
for(int i = 0 ; i < 32 ; i ++ ){
sb.append(str.charAt(rd.nextInt(str.length())));
}
return sb.toString();
}
/**
* 获取32位随机字符串
* @return
*/
public static String getNonceStr6(){
String str = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
StringBuilder sb = new StringBuilder();
Random rd = new Random();
for(int i = 0 ; i < 6 ; i ++ ){
sb.append(str.charAt(rd.nextInt(str.length())));
}
return sb.toString();
}
/**
* 插入XML标签
* @param sb
* @param Key
* @param value
* @return
*/
public static StringBuilder setXmlKV(StringBuilder sb,String Key,String value){
sb.append("<");
sb.append(Key);
sb.append(">");
sb.append(value);
sb.append("");
sb.append(Key);
sb.append(">");
return sb;
}
/**
* 解析XML 获得名称为para的参数值
* @param xml
* @param para
* @return
*/
public static String getXmlPara(String xml,String para){
int start = xml.indexOf("<"+para+">");
int end = xml.indexOf(""+para+">");
if(start < 0 && end < 0){
return null;
}
return xml.substring(start + ("<"+para+">").length(),end).replace("","");
}
/**
* 获取ip地址
* @param request
* @return
*/
public static String getIpAddr(HttpServletRequest request) {
InetAddress addr = null;
try {
addr = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
return request.getRemoteAddr();
}
byte[] ipAddr = addr.getAddress();
String ipAddrStr = "";
for (int i = 0; i < ipAddr.length; i++) {
if (i > 0) {
ipAddrStr += ".";
}
ipAddrStr += ipAddr[i] & 0xFF;
}
return ipAddrStr;
}
}
以下为微信内H5调起支付的示例代码:
JS代码如下:
//支付方法
function pay(){
var url = ctx + '/wxpay/jsPay/wxPay';
$.ajax({
type:"post",
url:url,
dataType:"json",
data:{gamePlayId:$("#gamePlayId").val(),userId:$("#userId").val()},
success:function(data) {
//调起微信支付
WeixinJSBridge.invoke('getBrandWCPayRequest', {
appId: data.appId,
timeStamp: data.timeStamp,
nonceStr: data.nonceStr,
package: data.packageStr,
signType: 'MD5',
paySign: data.paySign,
},
//调起微信支付成功
function (res) {
WeixinJSBridge.log(res.err_msg);
if (res.err_msg == "get_brand_wcpay_request:ok") {
alert("充值成功!");
//更新支付状态
updatePayStatus();
location.href = "url";
} else {
alert("充值失败!");
}
});
},
error: function () {
alert("data");
}
});
}
package参数为返回的订单预支付id,统一下单接口返回的prepay_id参数值,提交格式如:prepay_id=***
function(res){ if(res.err_msg == "get_brand_wcpay_request:ok" ){
// 使用以上方式判断前端返回,微信团队郑重提示: //res.err_msg将在用户支付成功后返回ok,但并不保证它绝对可靠。 }
在成功的回调函数中跳转到需要跳转的页面。
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