多平台统一管理软件接口,如何实现多平台统一管理软件接口
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2022-12-25
微信支付之公众号支付(java实现)
② mch_id:收款商家商户号;
③ APP_SECRET:第三方唯一凭证密码;
④ key:收款商户后台进行配置,登录微信商户平台–账户设置–安全设置–api安全,设置32位key值。
① 获取用户基本信息(主要是openid)权限配置:微信公众平台–开发–接口权限–网页授权–网页授权域名(不接受IP地址,需通过ICP备案验证,不带http):
② 支付测试目录及测试白名单设置:微信公众平台–微信支付–开发配置,测试授权目录具体到最后一级。
① 微信网页授权获取用户信息文档:https://developers.weixin.qq.com/miniprogram/dev/wxcloud/guide/functions/userinfo.html。根据文档拼装url,引导用户在微信上点击该链接,获取用户openid等基本信息;
https://open.weixin.qq.com/connect/oauth2/authorize?appid=APPID&redirect_uri=REDIRECT_URI&response_type=code&scope=SCOPE&state=STATE#wechat_redirect
各个参数需替换,含义如下:
REDIRECT_URI:重定向URL,可为商品列表页面或商品页面,用户授权成功即转到该URL指向页面
scope:snsapi_base和snsapi_userinfo两种,snsapi_base为用户静默授权,snsapi_userinfo需要用户进行授权确认,可以获得更多用户信息。本文选择后者
state:重定向后会带上此参数
③ 用户授权后,重定向的页面获得code参数(若用户禁止授权,则重定向后不会带上code参数,仅会带上state参数redirect_uri?state=STATE ),官方对于code参数的说明如下:
code作为换取access_token的票据,每次用户授权带上的code将不一样,code只能使用一次,5分钟未被使用自动过期。
重定向页面对应controller中通过String code = getPara("code");获取code参数。
④ contoller中同时利用WxPayUtil中方法,调用微信接口,获取当前用户openid,将该openid存入session:
setSessionAttr("openid", (WxPayUtil.getOpenIdByCode(code)).get("openid"));
4、用户选择商品点击付款,在商家提供h5页面确认支付对应controller中,进行统一下单,获得prepay_id(这里需要注意,订单金额转换成以分为单位)。统一下单的官方文档地址为:https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1
//统一下单,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("WxPay", userOrder.getStr(QfXDtGGqq"orderNo"), (entity.getBigDecimal("orderMoney").multiply(new BigDecimal(100))).intValue(), WxPayUtil.getIpAddr(getRequest()), getSessionAttr("openid").toString());
//生成包含prepay_id的map,map传入前端
map = WxPayUtil.getPayMap(prePayInfoXml);
//将订单号放入map,用以支付后处理
map.put("orderNo",userOrder.getStr("orderNo"));
5、前端获得上一步中的map后,调用微信支付JSAPI,前端js代码如下所示:
function payPublic(){
Common.AjaxSubmitBind("saveForm",function(){
saveIndex=Common.Loading("正在付款中");
},function(data){
prepay_id = data.prepay_id;
paySign = data.paySign;
appId = data.appId;
timeStamp = data.timeStamp;
nonceStr = data.nonceStr;
packageStr = data.packageStr;
signType = data.signType;
orderNo = data.orderNo;
callpay();
},function(errMsg,errCode){
Common.Alert(errMsg);
});
}
var prepay_id;
var paySign;
var appId;
var timeStamp;
var nonceStr;
var packageStr;
var signType;
var orderNo;
function onBridgeReady(){
WeixinJSBridge.invoke(
'getBrandWCPayRequest', {
"appId" : appId, //公众号名称,由商户传入
"timeStamp" : timeStamp, //时间戳,自1970年以来的秒数
"nonceStr" : nonceStr , //随机串
"package" : packageStr,
"signType" : signType, //微信签名方式:
"paySign" : paySign //微信签名
},
function(res){
if(res.err_msg == "get_brand_wcpay_request:ok" ) {
alert("交易成功");
window.location.href="${base}/test/paySuccess" rel="external nofollow" ;
}
if (res.err_msg == "get_brand_wcpay_request:cancel") {
alert("交易取消");
window.location.href="${base}/test/cancel" rel="external nofollow" ;
}
if (res.err_msg == "get_brand_wcpay_request:fail") {
alert("支付失败");
window.location.href="${base}/test/fail" rel="external nofollow" ;
}
}
);
}
function callpay(){
if (typeof WeixinJSBridge == "undefined"){
if( document.addEventListener ){
document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
}else if (document.attachEvent){
document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
}
}else{
onBridgeReady();
}
}
6、用户完成支付,后台等待微信支付回调,进行支付成功后操作:
① 用户输入密码完成支付。后台回调地址(统一下单中设定的notify_url)接收微信支付结果,对支付结果进行判断并进行对应操作:
public void notify(){
System.out.print("微信支付回调获取数据开始");
HttpServletRequest request = getRequest();
String resXml = WxPayUtil.getNotifyResult(request);
//向微信输出处理结果,如果成功(SUCCESS),微信就不会继续调用了,否则微信会连续调用8次
renderText(resXml, "text/xml");
}
相关工具及常量类如下:
① WxPayUtil类(支付工具类):
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
//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", WxPayConstants.APPID);
reqEntityStr = reqEntityStr.replace("SECRET", WxPayConstants.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 = new JSONObject(strResult);
Map
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
* @param out_trade_no
* @param total_fee
* @param IP
* @param notify_url
* @param openid
* @return
* @throws IOException
*/
public static String unifiedOrder(String body,String out_trade_no,Integer total_fee,String IP,String openid)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=" + WxPayConstants.APPID +
"&body=" + body +
"&mch_id=" + WxPayConstants.MCH_ID +
"&nonce_str=" + nonce_str +
"¬ify_url=" + WxPayConstants.NOTIFY_URL +
"&openid=" + openid +
"&out_trade_no=" + out_trade_no +
"&spbill_create_ip=" + IP +
"&total_fee=" + total_fee.toString() +
"&trade_type=" + WxPayConstants.TRADE_TYPE_JS +
"&key=" + WxPayConstants.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 = ToolMD5.MD5Encode(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",WxPayConstants.APPID);
setXmlKV(sb,"body",body);
setXmlKV(sb,"mch_id",WxPayConstants.MCH_ID);
setXmlKV(sb,"nonce_str",nonce_str);
setXmlKV(sb,"notify_url",WxPayConstants.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",WxPayConstants.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;
}
/**
* 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
Map
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=" + WxPayConstants.APPID +
"&nonceStr=" + nonceStr +
"&package=prepay_id=" + prepay_id +
"&signType=" + signType +
"&timeStamp=" + timeStamp +
"&key="+ WxPayConstants.KEY;//注意这里的参数要根据ASCII码 排序
paySign = ToolMD5.MD5Encode(paySign,"").toUpperCase();//将数据MD5加密
map.put("appId",WxPayConstants.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(ToolString.isEmpty(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 +
"&totaQfXDtGGqql_fee=" + total_fee +
"&trade_type=" + trade_type +
"&transaction_id=" + transaction_id +
"&key=" + WxPayConstants.KEY;//注意这里的参数要根据ASCII码 排序
localSign = ToolMD5.MD5Encode(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");
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();
}
/**
* 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("<![CDATA[","").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;
}
}
② 常量类(根据商户信息进行设置):
public class WxPayConstants {
//第三方用户唯一ID
public static String APPID = "";
//第三方用户唯一凭证密码
public static String APP_SECRET = "";
//商户ID
public static String MCH_ID = "";
//微信商户平台-账户设置-安全设置-api安全,配置32位key
public static String KEY = "";
//交易类型
public static String TRADE_TYPE_JS = "JSAPI";
//微信支付回调url
public static String NOTIFY_URL = "";
}
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