java微信支付功能实现源码
提示:仅微信支付功能模块类,可供参考,可点赞
一、java后台实现源码
packagecn.xydx.crowdfunding.controller; importcn.xydx.crowdfunding.util.HttpRequest; importcn.xydx.crowdfunding.util.WXPayUtil; importorg.json.JSONObject; importorg.springframework.stereotype.Controller; importorg.springframework.web.bind.annotation.CrossOrigin; importorg.springframework.web.bind.annotation.RequestMapping; importorg.springframework.web.bind.annotation.RequestMethod; importorg.springframework.web.bind.annotation.ResponseBody; importjavax.servlet.http.HttpServletRequest; importjava.text.DateFormat; importjava.text.SimpleDateFormat; importjava.util.Date; importjava.util.HashMap; importjava.util.Map; importjava.util.Random; importstaticcn.xydx.crowdfunding.util.WXPayConfig.appid; importstaticcn.xydx.crowdfunding.util.WXPayConfig.appsecret; importstaticcn.xydx.crowdfunding.util.WXPayConfig.mch_id; importstaticcn.xydx.crowdfunding.util.WXPayConfig.key; @Controller @RequestMapping(value="WeixinService") @CrossOrigin publicclassWeixinPayController{ /** *@paramrequest *@paramcode *@returnMap *@Description微信浏览器内微信支付/公众号支付(JSAPI) */ @RequestMapping(value="orders",method=RequestMethod.GET) @ResponseBody publicMaporders(HttpServletRequestrequest,Stringcode){ try{ //页面获取openId接口 Stringgetopenid_url="https://api.weixin.qq.com/sns/oauth2/access_token"; Stringparam="appid="+appid+"&secret="+appsecret+"&code="+code+"&grant_type=authorization_code"; //向微信服务器发送get请求获取openIdStr StringopenIdStr=HttpRequest.sendGet(getopenid_url,param); //JSONObjectjson=JSONObject.parseObject(openIdStr);//转成Json格式 JSONObjectjson=newJSONObject(openIdStr); StringopenId=json.getString("openid");//获取openId //拼接统一下单地址参数 MapparaMap=newHashMap (); //获取请求ip地址 Stringip=request.getHeader("x-forwarded-for"); if(ip==null||ip.length()==0||"unknown".equalsIgnoreCase(ip)){ ip=request.getHeader("Proxy-Client-IP"); } if(ip==null||ip.length()==0||"unknown".equalsIgnoreCase(ip)){ ip=request.getHeader("WL-Proxy-Client-IP"); } if(ip==null||ip.length()==0||"unknown".equalsIgnoreCase(ip)){ ip=request.getRemoteAddr(); } if(ip.indexOf(",")!=-1){ String[]ips=ip.split(","); ip=ips[0].trim(); } paraMap.put("appid",appid); paraMap.put("mch_id",mch_id); paraMap.put("nonce_str",WXPayUtil.generateNonceStr()); paraMap.put("body","CrowdFund"); paraMap.put("out_trade_no",getOrderSn());//订单号 paraMap.put("total_fee","1"); paraMap.put("spbill_create_ip",ip); paraMap.put("notify_url","http://******/index.html");//此路径是微信服务器调用支付结果通知路径随意写 paraMap.put("trade_type","JSAPI"); paraMap.put("openid",openId); Stringsign=WXPayUtil.generateSignature(paraMap,key); paraMap.put("sign",sign); Stringxml=WXPayUtil.mapToXml(paraMap);//将所有参数(map)转xml格式 //System.out.println("xml="+xml); //统一下单 Stringunifiedorder_url="https://api.mch.weixin.qq.com/pay/unifiedorder"; StringxmlStr=HttpRequest.sendPost(unifiedorder_url,xml);//发送post请求"统一下单接口"返回预支付id:prepay_id System.out.println(xmlStr); //以下内容是返回前端页面的json数据 Stringprepay_id="";//预支付id if(xmlStr.indexOf("SUCCESS")!=-1){ Map map=WXPayUtil.xmlToMap(xmlStr); prepay_id=(String)map.get("prepay_id"); } Map payMap=newHashMap (); payMap.put("appId",appid); payMap.put("timeStamp",WXPayUtil.getCurrentTimestamp()+""); payMap.put("nonceStr",WXPayUtil.generateNonceStr()); payMap.put("signType","MD5"); payMap.put("package","prepay_id="+prepay_id); StringpaySign=WXPayUtil.generateSignature(payMap,key); payMap.put("paySign",paySign); //System.out.println("code="+code); System.out.println("openIdStr="+openIdStr); returnpayMap; }catch(Exceptione){ e.printStackTrace(); } returnnull; } publicStringgetOrderSn(){ //创建不同的日期格式 DateFormatdf=newSimpleDateFormat("yyyyMMddHHmmss"); Randomrm=newRandom(); //获得随机数 doublepross=(1+rm.nextDouble())*Math.pow(10,6); //将获得的获得随机数转化为字符串 StringfixLenthString=String.valueOf(pross); StringdateNum=df.format(newDate())+"WX"+fixLenthString.substring(1,7); returndateNum; } @RequestMapping(value="orderquery",method=RequestMethod.GET) @ResponseBody publicStringorderquery(){ try{ Map reqMap=newHashMap (); reqMap.put("appid",appid); reqMap.put("mch_id",mch_id); reqMap.put("nonce_str",WXPayUtil.generateNonceStr()); reqMap.put("out_trade_no",getOrderSn());//商户系统内部的订单号, Stringsign=WXPayUtil.generateSignature(reqMap,key); reqMap.put("sign",sign); StringreqXmlStr=WXPayUtil.mapToXml(reqMap);//将所有参数(map)转xml格式 //System.out.println("xml="+reqXmlStr); //查询订单https://api.mch.weixin.qq.com/pay/orderquery Stringorderquery="https://api.mch.weixin.qq.com/pay/orderquery"; StringxmlStr=HttpRequest.sendPost(orderquery,reqXmlStr); returnxmlStr; }catch(Exceptione){ e.printStackTrace(); } returnnull; } }
HttpRequest类
packagecn.xydx.crowdfunding.util; importjava.io.BufferedReader; importjava.io.IOException; importjava.io.InputStreamReader; importjava.io.PrintWriter; importjava.net.URL; importjava.net.URLConnection; importjava.util.List; importjava.util.Map; publicclassHttpUtil{ /** *向指定URL发送GET方法的请求 * *@paramurl发送请求的URL *//@paramparam请求参数,请求参数应该是name1=value1&name2=value2的形式。 *@returnURL所代表远程资源的响应结果 */ publicstaticStringsendGet(Stringurl){ Stringresult=""; BufferedReaderin=null; try{ StringurlNameString=url; URLrealUrl=newURL(urlNameString); //打开和URL之间的连接 URLConnectionconnection=realUrl.openConnection(); //设置通用的请求属性 connection.setRequestProperty("accept","*/*"); connection.setRequestProperty("connection","Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0(compatible;MSIE6.0;WindowsNT5.1;SV1)"); //建立实际的连接 connection.connect(); //获取所有响应头字段 Map>map=connection.getHeaderFields(); //遍历所有的响应头字段 for(Stringkey:map.keySet()){ System.out.println(key+"--->"+map.get(key)); } //定义BufferedReader输入流来读取URL的响应 in=newBufferedReader(newInputStreamReader( connection.getInputStream())); Stringline; while((line=in.readLine())!=null){ result+=line; } }catch(Exceptione){ System.out.println("发送GET请求出现异常!"+e); e.printStackTrace(); } //使用finally块来关闭输入流 finally{ try{ if(in!=null){ in.close(); } }catch(Exceptione2){ e2.printStackTrace(); } } returnresult; } /** *向指定URL发送POST方法的请求 * *@paramurl发送请求的URL *@paramparam请求参数,请求参数应该是name1=value1&name2=value2的形式。 *@return所代表远程资源的响应结果 */ publicstaticStringsendPost(Stringurl,Stringparam){ PrintWriterout=null; BufferedReaderin=null; Stringresult=""; try{ URLrealUrl=newURL(url); //打开和URL之间的连接 URLConnectionconn=realUrl.openConnection(); //设置通用的请求属性 conn.setRequestProperty("accept","*/*"); conn.setRequestProperty("connection","Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0(compatible;MSIE6.0;WindowsNT5.1;SV1)"); //发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); //获取URLConnection对象对应的输出流 out=newPrintWriter(conn.getOutputStream()); //发送请求参数 out.print(param); //flush输出流的缓冲 out.flush(); //定义BufferedReader输入流来读取URL的响应 in=newBufferedReader( newInputStreamReader(conn.getInputStream())); Stringline; while((line=in.readLine())!=null){ result+=line; } }catch(Exceptione){ System.out.println("发送POST请求出现异常!"+e); e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } }catch(IOExceptionex){ ex.printStackTrace(); } } returnresult; } }
WXPayUtil类
packagecn.xydx.crowdfunding.util; importcn.xydx.crowdfunding.util.WXPayConstants.SignType; importorg.slf4j.Logger; importorg.slf4j.LoggerFactory; importorg.w3c.dom.Node; importorg.w3c.dom.NodeList; importjavax.crypto.Mac; importjavax.crypto.spec.SecretKeySpec; importjavax.xml.parsers.DocumentBuilder; importjavax.xml.transform.OutputKeys; importjavax.xml.transform.Transformer; importjavax.xml.transform.TransformerFactory; importjavax.xml.transform.dom.DOMSource; importjavax.xml.transform.stream.StreamResult; importjava.io.ByteArrayInputStream; importjava.io.InputStream; importjava.io.StringWriter; importjava.security.MessageDigest; importjava.security.SecureRandom; importjava.util.*; publicclassWXPayUtil{ privatestaticfinalStringSYMBOLS="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"; privatestaticfinalRandomRANDOM=newSecureRandom(); /** *XML格式字符串转换为Map * *@paramstrXMLXML字符串 *@returnXML数据转换后的Map *@throwsException */ publicstaticMapxmlToMap(StringstrXML)throwsException{ try{ Map data=newHashMap (); DocumentBuilderdocumentBuilder=WXPayXmlUtil.newDocumentBuilder(); InputStreamstream=newByteArrayInputStream(strXML.getBytes("UTF-8")); org.w3c.dom.Documentdoc=documentBuilder.parse(stream); doc.getDocumentElement().normalize(); NodeListnodeList=doc.getDocumentElement().getChildNodes(); for(intidx=0;idx data)throwsException{ org.w3c.dom.Documentdocument=WXPayXmlUtil.newDocument(); org.w3c.dom.Elementroot=document.createElement("xml"); document.appendChild(root); for(Stringkey:data.keySet()){ Stringvalue=data.get(key); if(value==null){ value=""; } value=value.trim(); org.w3c.dom.Elementfiled=document.createElement(key); filed.appendChild(document.createTextNode(value)); root.appendChild(filed); } TransformerFactorytf=TransformerFactory.newInstance(); Transformertransformer=tf.newTransformer(); DOMSourcesource=newDOMSource(document); transformer.setOutputProperty(OutputKeys.ENCODING,"UTF-8"); transformer.setOutputProperty(OutputKeys.INDENT,"yes"); StringWriterwriter=newStringWriter(); StreamResultresult=newStreamResult(writer); transformer.transform(source,result); Stringoutput=writer.getBuffer().toString();//.replaceAll("\n|\r",""); try{ writer.close(); } catch(Exceptionex){ } returnoutput; } /** *生成带有sign的XML格式字符串 * *@paramdataMap类型数据 *@paramkeyAPI密钥 *@return含有sign字段的XML */ publicstaticStringgenerateSignedXml(finalMap data,Stringkey)throwsException{ returngenerateSignedXml(data,key,SignType.MD5); } /** *生成带有sign的XML格式字符串 * *@paramdataMap类型数据 *@paramkeyAPI密钥 *@paramsignType签名类型 *@return含有sign字段的XML */ publicstaticStringgenerateSignedXml(finalMap data,Stringkey,SignTypesignType)throwsException{ Stringsign=generateSignature(data,key,signType); data.put(WXPayConstants.FIELD_SIGN,sign); returnmapToXml(data); } /** *判断签名是否正确 * *@paramxmlStrXML格式数据 *@paramkeyAPI密钥 *@return签名是否正确 *@throwsException */ publicstaticbooleanisSignatureValid(StringxmlStr,Stringkey)throwsException{ Map data=xmlToMap(xmlStr); if(!data.containsKey(WXPayConstants.FIELD_SIGN)){ returnfalse; } Stringsign=data.get(WXPayConstants.FIELD_SIGN); returngenerateSignature(data,key).equals(sign); } /** *判断签名是否正确,必须包含sign字段,否则返回false。使用MD5签名。 * *@paramdataMap类型数据 *@paramkeyAPI密钥 *@return签名是否正确 *@throwsException */ publicstaticbooleanisSignatureValid(Map data,Stringkey)throwsException{ returnisSignatureValid(data,key,SignType.MD5); } /** *判断签名是否正确,必须包含sign字段,否则返回false。 * *@paramdataMap类型数据 *@paramkeyAPI密钥 *@paramsignType签名方式 *@return签名是否正确 *@throwsException */ publicstaticbooleanisSignatureValid(Map data,Stringkey,SignTypesignType)throwsException{ if(!data.containsKey(WXPayConstants.FIELD_SIGN)){ returnfalse; } Stringsign=data.get(WXPayConstants.FIELD_SIGN); returngenerateSignature(data,key,signType).equals(sign); } /** *生成签名 * *@paramdata待签名数据 *@paramkeyAPI密钥 *@return签名 */ publicstaticStringgenerateSignature(finalMap data,Stringkey)throwsException{ returngenerateSignature(data,key,SignType.MD5); } /** *生成签名.注意,若含有sign_type字段,必须和signType参数保持一致。 * *@paramdata待签名数据 *@paramkeyAPI密钥 *@paramsignType签名方式 *@return签名 */ publicstaticStringgenerateSignature(finalMap data,Stringkey,SignTypesignType)throwsException{ Set keySet=data.keySet(); String[]keyArray=keySet.toArray(newString[keySet.size()]); Arrays.sort(keyArray); StringBuildersb=newStringBuilder(); for(Stringk:keyArray){ if(k.equals(WXPayConstants.FIELD_SIGN)){ continue; } if(data.get(k).trim().length()>0)//参数值为空,则不参与签名 sb.append(k).append("=").append(data.get(k).trim()).append("&"); } sb.append("key=").append(key); if(SignType.MD5.equals(signType)){ returnMD5(sb.toString()).toUpperCase(); } elseif(SignType.HMACSHA256.equals(signType)){ returnHMACSHA256(sb.toString(),key); } else{ thrownewException(String.format("Invalidsign_type:%s",signType)); } } /** *获取随机字符串NonceStr * *@returnString随机字符串 */ publicstaticStringgenerateNonceStr(){ char[]nonceChars=newchar[32]; for(intindex=0;index 二、前端支付关键模块
立即订购
需要上面的连接获取code
//获取code functiongetQueryString(name){ varreg=newRegExp("(^|&)"+name+"=([^&]*)(&|$)","i"); varr=window.location.search.substr(1).match(reg); if(r!=null)returnunescape(r[2]);returnnull; }
varcode=getQueryString("code"); if(code){ varurl="http://******/WeixinService/orders?code="+code+""; $.get(url,function(data){ varappid=data.appId; vartimeStamp=data.timeStamp; varnonceStr=data.nonceStr; varpackage=data.package; varsignType=data.signType; varpaySign=data.paySign; if(typeofWeixinJSBridge=="undefined"){ if(document.addEventListener){ document.addEventListener('WeixinJSBridgeReady', onBridgeReady,false); }elseif(document.attachEvent){ document.attachEvent('WeixinJSBridgeReady', onBridgeReady); document.attachEvent('onWeixinJSBridgeReady', onBridgeReady); } }else{ //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":package, "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"){ //console.log('支付成功'); //支付成功后比如新增数据 $.post("http://******/saveUser",{ userName:$('#inputName').val(), userIdentity:$('#inputIdentity').val(), companyName:$('#inputCompany').val(), userPhone:$('#inputPhone').val() }, function(data,status){ alert("数据:\n你好!"+$('#inputName').val()+"\n状态:"+status); }, "json" ); //支付成功后跳转的页面 alert("支付成功!将返回首页!请分享******!"); window.history.go(-1); }elseif(res.err_msg=="get_brand_wcpay_request:cancel"){ //console.log('支付取消'); alert("支付取消!保证数据安全重新参加订购!"); //WeixinJSBridge.call('closeWindow'); window.history.go(-1); }elseif(res.err_msg=="get_brand_wcpay_request:fail"){ //console.log('支付失败'); alert("支付失败!重复支付,建议稍后参加订购"); WeixinJSBridge.call('closeWindow'); }//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。 }); } },"json") }else{ alert("服务器异常") }
提示:前端关键通过http连接生成code。后端最后获取reqXmlStr若不成功,可重置商户秘钥key。
总结
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