微信APP支付（IOS手机端+java后台）版

0.介绍预览

针对需要在ios手机上接入原生微信支付场景，调用微信进行支付。如图：

1.资料准备

1.1 账号注册

打开https://open.weixin.qq.com，注册微信开放平台开发者账号

1.2 开发者认证

登录，进入账号中心，进行开发者资质认证。

1.3 注册应用

认证完成后，进入管理中心，新建移动应用。填写应用资料，其中android版应用签名可通过扫码安装温馨提供的应用获得，详细参考微信文档。创建完成后点击查看，申请开通微信支付。一切准备就绪！

2.java后台开发

添加依赖

<!-- 微信支付依赖 -->
<dependency>
 <groupid>org.xmlpull</groupid>
 <artifactid>xmlpull</artifactid>
 <version>1.1.3.1 </version>
</dependency>
<dependency>
 <groupid>net.sf.json-lib</groupid>
 <artifactid>json-lib</artifactid>
 <version>2.3</version>
 <classifier>jdk15</classifier>
</dependency>
<!-- https://mvnrepository.com/artifact/com.thoughtworks.xstream/xstream -->
<dependency>
 <groupid>com.thoughtworks.xstream</groupid>
 <artifactid>xstream</artifactid>
 <version>1.4.5</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.ning/async-http-client -->
<dependency>
 <groupid>com.ning</groupid>
 <artifactid>async-http-client</artifactid>
 <version>1.8.13</version>
</dependency>

生成统一订单

@requestmapping(value="/pay/wxpay/params",produces="application/json;charset=utf-8")
 @responsebody
 public string signprams(httpservletrequest request){
  string res = "{code:404}";
  try{
  // 充值金额
   string account = request.getparameter("account");
  // 用户id
   string sid = request.getparameter("sid");
   string subject = "订单标题";
   string body = "订单描述";
 
   int acc = (int) (double.valueof(account) * 100);
   string appid = "您的appid";
   string out_trade_no = "生成您的订单号";
  // 生成订单数据
   sortedmap<string, string> paymap = genorderdata(request, subject, body, acc, appid, out_trade_no);
 
   savepaylog(out_trade_no,account,sid,body,paymap.get("paysign"),nid,2);
 
   // 4.返回数据
   res = buildpayres(paymap,out_trade_no);
  }catch (exception e){
   e.printstacktrace();
   res = "{code:500}";
  }
  return res;
 }
 
 private sortedmap<string, string> genorderdata(httpservletrequest request, string subject, string body,
          int acc, string appid, string out_trade_no)
   throws ioexception, executionexception, interruptedexception, xmlpullparserexception {
  sortedmap<string, string> paramap = new treemap<string, string>();
  paramap.put("appid", appid);
  paramap.put("attach", subject);
  paramap.put("body", body);
  paramap.put("mch_id", "您的商户id，到商户平台查看");
  paramap.put("nonce_str", create_nonce_str());
  paramap.put("notify_url", "http://pay.xxxxx.com/pay/wxpay/notify.htm ");// 此路径是微信服务器调用支付结果通知路径
  paramap.put("out_trade_no", out_trade_no);
  paramap.put("spbill_create_ip", request.getremoteaddr());
  paramap.put("total_fee", acc+"");
  paramap.put("trade_type", "app");
  string sign = createsign(paramap);
  paramap.put("sign", sign);
  // 统一下单 https://api.mch.weixin.qq.com/pay/unifiedorder 
  string url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
  string xml = getrequestxml(paramap);
  string xmlstr = httpkit.post(url, xml);
 
  // 预付商品id
  string prepay_id = "";
  if (xmlstr.indexof("success") != -1) {
   map<string, string> map = wxrequestutil.doxmlparse(xmlstr);
   prepay_id = (string) map.get("prepay_id");
  }
 
  sortedmap<string, string> paymap = new treemap<string, string>();
  paymap.put("appid", appid);
  paymap.put("partnerid", "您的商户id，到商户平台查看");
  paymap.put("prepayid", prepay_id);
  paymap.put("package", "sign=wxpay");
  paymap.put("noncestr", create_nonce_str());
  paymap.put("timestamp", wxrequestutil.create_timestamp());
  string paysign = createsign(paymap);
  paymap.put("paysign", paysign);
  return paymap;
 }
 
 //请求xml组装 
 public static string getrequestxml(sortedmap<string,string> parameters){ 
  string sign = "";
   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 key = (string)entry.getkey(); 
    string value = (string)entry.getvalue(); 
//    if ("attach".equalsignorecase(key)||"body".equalsignorecase(key)||"sign".equalsignorecase(key)) { 
//     sb.append("<"+key+">"+value+"</"+key+">"); 
//    }
    if ("sign".equalsignorecase(key)){
    sign = "<"+key+">"+value+"</"+key+">";
    }else { 
     sb.append("<"+key+">"+value+"</"+key+">"); 
    } 
   } 
   sb.append(sign); 
   sb.append("</xml>"); 
   return sb.tostring(); 
  } 
 
 //生成签名 
 public string createsign(sortedmap<string,string> parameters){ 
   stringbuffer sb = new stringbuffer(); 
   set es = parameters.entryset(); 
   iterator it = es.iterator(); 
   while(it.hasnext()) { 
    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=" + wxconfig.app_pertner_key); 
   system.out.println(sb.tostring());
   string sign = md5utils.md5encode(sb.tostring(),"utf-8").touppercase(); 
   return sign; 
  } 
 
 
 public string create_nonce_str() {
 string chars = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789";
 string res = "";
 for (int i = 0; i < 32; i++) {
 random rd = new random();
 res += chars.charat(rd.nextint(chars.length() - 1));
 }
 return res;
 }

3.ios客户端开发

导入微信开发包

添加url types

在appdelegate.m中注册应用

#import "appdelegate.h"
#import "xstabbarviewcontroller.h"
#import <alipaysdk/alipaysdk.h>
#import "wxapi.h"
 
@interface appdelegate ()<wxapidelegate>
 
@end
 
@implementation appdelegate
 
 
- (bool)application:(uiapplication *)application didfinishlaunchingwithoptions:(nsdictionary *)launchoptions {
 // override point for customization after application launch.
 
// [nsthread sleepfortimeinterval:2.0];
 
 // 进入主控制器
 self.window = [[uiwindow alloc] init];
 self.window.frame = [uiscreen mainscreen].bounds;
 self.window.rootviewcontroller = [[xstabbarviewcontroller alloc] init];
 
 [self.window makekeyandvisible];
 
 //向微信注册应用。
 [wxapi registerapp:@"wxfb96c2a9b531be26"];
 
 return yes;
}
 
-(void) onresp:(baseresp*)resp
{
//  nslog(@" ----onresp %@",resp);
 /*
  errcode err_ok = 0(用户同意)
  err_auth_denied = -4（用户拒绝授权）
  err_user_cancel = -2（用户取消）
  code 用户换取access_token的code，仅在errcode为0时有效
  state 第三方程序发送时用来标识其请求的唯一性的标志，由第三方程序调用sendreq时传入，由微信终端回传，state字符串长度不能超过1k
  lang 微信客户端当前语言
  country 微信用户当前国家信息
  */
 if ([resp iskindofclass:[sendauthresp class]]) //判断是否为授权请求，否则与微信支付等功能发生冲突
 {
  sendauthresp *aresp = (sendauthresp *)resp;
  if (aresp.errcode== 0)
  {
   //   nslog(@"code %@",aresp.code);
   [[nsnotificationcenter defaultcenter] postnotificationname:@"wechatdidloginnotification" object:self userinfo:@{@"code":aresp.code}];
  }
 }else{ // 支付请求回调
  //支付返回结果，实际支付结果需要去微信服务器端查询
  nsstring *strmsg = [nsstring stringwithformat:@"支付结果"];
  nsstring *respcode = @"0";
  switch (resp.errcode) {
   case wxsuccess:
    strmsg = @"支付结果：成功！";
    //    nslog(@"支付成功－paysuccess，retcode = %d", resp.errcode);
    respcode = @"1";
    break;
   default:
    strmsg = [nsstring stringwithformat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errcode,resp.errstr];
    //    nslog(@"错误，retcode = %d, retstr = %@", resp.errcode,resp.errstr);
    respcode = @"0";
    break;
  }
  [[nsnotificationcenter defaultcenter] postnotificationname:@"wechatdidpaynotification" object:self userinfo:@{@"respcode":respcode}];
 }
}
 
 
//ios 9.0 之前的处理方法不保证正确,如有错误还望指正
- (bool)application:(uiapplication *)application openurl:(nsurl *)url sourceapplication:(nsstring *)sourceapplication annotation:(id)annotation
{
 nslog(@"ios 9.0 之前");
 return [self applicationopenurl:url];
}
 
-(bool)application:(uiapplication *)app openurl:(nsurl *)url options:(nsdictionary<uiapplicationopenurloptionskey,id> *)options {
 nslog(@"ios 9.0 之后");
 return [self applicationopenurl:url];
}
 
- (bool)applicationopenurl:(nsurl *)url
{
 if([[url absolutestring] rangeofstring:@"wxfb96c2a9b531be26://pay"].location == 0){
  return [wxapi handleopenurl:url delegate:self];
 }
 if ([url.host isequaltostring:@"safepay"])
 {
  [[alipaysdk defaultservice] processorderwithpaymentresult:url standbycallback:nil];
  return yes;
 }
 return yes;
}
 
}

在需要支付的controller中接受微信支付通知

- (void)viewdidload {
 [super viewdidload];
 
 // 接受微信支付通知
 [[nsnotificationcenter defaultcenter] addobserver:self selector:@selector(wechatdidpaynotification:) name:@"wechatdidpaynotification" object:nil];
}

向服务器端获取统一订单，并拉起微信进行支付

-(void)weixinpay
{
 nsstring *userurlstr = [nsstring stringwithformat:@"%@?sid=%@&account=%@&desc=%@", wx_prepay_url, self.student.sid,self.payjine,self.student.nid];
 nsurl *url = [nsurl urlwithstring:userurlstr];
//  nslog(@"userurlstr = %@", userurlstr);
 
 nsurlrequest *request = [nsurlrequest requestwithurl:url];
 afhttprequestoperation *operation = [[afhttprequestoperation alloc]initwithrequest:request];
 
 [mbprogresshud showmessage:@"跳转中，请稍候"];
 [operation setcompletionblockwithsuccess:^(afhttprequestoperation *operation, nsdictionary *responseobject) {
  [mbprogresshud hidehud];
  
//   nslog(@"微信支付的response = %@", operation.responsestring);
  nsdata *jsondata = [operation.responsestring datausingencoding:nsutf8stringencoding];
  nsdictionary *userdict = [nsjsonserialization jsonobjectwithdata:jsondata options:nsjsonreadingmutableleaves error:nil];
  
  // 调用微信支付
  payreq *request = [[payreq alloc] init];
  /** 商家向财付通申请的商家id */
  request.partnerid = [userdict objectforkey:@"partnerid"];
  /** 预支付订单 */
  request.prepayid= [userdict objectforkey:@"prepayid"];
  /** 商家根据财付通文档填写的数据和签名 */
  request.package = [userdict objectforkey:@"package"];
  /** 随机串，防重发 */
  request.noncestr= [userdict objectforkey:@"noncestr"];
  /** 时间戳，防重发 */
  request.timestamp= [[userdict objectforkey:@"timestamp"] intvalue];
  /** 商家根据微信开放平台文档对数据做的签名 */
  request.sign= [userdict objectforkey:@"sign"];
  self.sign = request.sign;
  self.ordnum = [userdict objectforkey:@"ordnum"];
  
 
  [wxapi sendreq: request];
 }failure:^(afhttprequestoperation *operation, nserror *error) {
  [mbprogresshud hidehud];
  nslog(@"发生错误！%@",error);
 }];
 nsoperationqueue *queue = [[nsoperationqueue alloc] init];
 [queue addoperation:operation];
 
}
// 微信支付结果
-(void)wechatdidpaynotification:(nsnotification *)notification
{
// nslog(@"wechatdidpaynotification");
 nsdictionary *namedictionary = [notification userinfo];
 nsstring *respcode = [namedictionary objectforkey:@"respcode"];
 if([respcode isequaltostring:@"1"]){
  // 支付成功，更新用户信息
  [self paydidfinish];
 }else{
  // 支付失败，
  [self setupalertcontrollerwithtitle:@"微信支付结果" messge:@"本次支付未完成，您可以稍后重试！" confirm:@"好的"];
 }
}

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