背景
由于项目是采用Java编写的，微信包括微信支付大都是PHP相关，于是微信支付官方文档对java的支持就不是很友好，在网上找了很多文章，基本上没有一篇是真正跑的通的，经过一番整理，先将java接入微信支付详细流程总结出来以便后续使用。
步骤一
准备阶段：已认证微信号，且通过微信支付认证，这个可以看微信文档，很详细，这里就不再重复。
步骤二
配置授权目录，官方推荐使用https类型的url，不知道http能不能行，个人也推荐使用https的保证不会错。
配置授权域名
步骤三
微信支付二次开发所需要的参数：
APP_ID,APP_KEY,PARTNER,PARTNER_KEY(AppSecret)
APP_ID和PARTNER_KEY(AppSecret)
PARTNER
APP_KEY（自行设置32位字符）
步骤四
4.1通过页面跳转到确认支付页面，其中的redirect_uri必须是配置授权目录下的
- <html>
- <head>
- <title>支付测试</title>
- </head>
- <body>
- <a href="https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx619890d997071358&redirect_uri=https%3A%2F%2Fm.yangji.com%2Fpay%2FpayTest.jsp&response_type=code&scope=snsapi_base&state=123#wechat_redirect">支付测试</a>
- </body>
- </html>
4.2 获取到openid，再经服务器向微信请求获取prepay_id,封装字段并进行签名后通过jsapi调起微信支付
网页端
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" /> <meta name="apple-mobile-web-app-capable" content="yes" /> <meta name="apple-mobile-web-app-status-bar-style" content="black" /> <meta name="format-detection" content="telephone=no" /> <title>测试支付</title> <link href="../css/css.css?v=1.0" rel="stylesheet" type="text/css"> </head> <body> <div class="index_box"> <div class="apply_name">微信js支付测试</div> <div class="branch_con"> <ul> <li><span class="name">测试支付信息[]</span></li> </ul> <p class="cz_btn"><a href="javascript:pay();" class="btn_1">立即支付</a></p> </div> </div> <% String code = request.getParameter("code"); %> <input type="text" id="code" value="<%out.print(code); %>"/> <input type="text" id="path" value="${pageContext.request.contextPath}"/> <div><hr/> code:<%out.print(code); %> </div> <script type="text/javascript"> var appId,timeStamp,nonceStr,pg,signType,paySign; 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" : "prepay_id=" + pg, "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("支付成功"); } } ); } function pay(){ var code = document.getElementById("code").value; var path = document.getElementById("path").value; send_request(function(value){ var json = eval("(" + value + ")"); if(json.length > 0){ appId = json[0].appId; timeStamp = json[0].timeStamp; nonceStr = json[0].nonceStr; pg = json[0].pg; signType = json[0].signType; paySign = json[0].paySign; 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(); } } },path+"/pay/payparm.htm?openId="+code, true); } function send_request(callback, urladdress,isReturnData){ var xmlhttp = getXMLHttpRequest(); xmlhttp.onreadystatechange = function(){ if (xmlhttp.readyState == 4) { try{ if(xmlhttp.status == 200){ if(isReturnData && isReturnData==true){ callback(xmlhttp.responseText); } }else{ callback("页面找不到！"+ urladdress +""); } } catch(e){ callback("请求发送失败，请重试！" + e); } } } xmlhttp.open("POST", urladdress, true); xmlhttp.send(null); } function getXMLHttpRequest() { var xmlhttp; if (window.XMLHttpRequest) { try { xmlhttp = new XMLHttpRequest(); xmlhttp.overrideMimeType("text/html;charset=UTF-8"); } catch (e) {} } else if (window.ActiveXObject) { try { xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { try { xmlhttp = new ActiveXObject("Msxml2.XMLHttp"); } catch (e) { try { xmlhttp = new ActiveXObject("Msxml3.XMLHttp"); } catch (e) {} } } } return xmlhttp; } </script> </body> </html>
服务器端
@RequestMapping("/pay/payparm")
public void payparm(HttpServletRequest request, HttpServletResponse response){
try {
// 获取openid
String openId = (String) request.getSession().getAttribute("openId");
if (openId == null) {
openId = getUserOpenId(request);
}
String appid = WXConfig.APP_ID;
String paternerKey = WXConfig.PERTNER_KEY;
String out_trade_no = getTradeNo();
Map<String, String> paraMap = new HashMap<String, String>();
paraMap.put("appid", appid);
paraMap.put("attach", "测试");
paraMap.put("body", "测试购买支付");
paraMap.put("mch_id", WXConfig.PARTNER);
paraMap.put("nonce_str", create_nonce_str());
paraMap.put("openid", openId);
paraMap.put("out_trade_no", out_trade_no);
paraMap.put("spbill_create_ip", getAddrIp(request));
paraMap.put("total_fee", "1");
paraMap.put("trade_type", "JSAPI");
paraMap.put("notify_url", "http://m.ebiaotong.com/WXPay/notify");// 此路径是微信服务器调用支付结果通知路径
String sign = getSign(paraMap, paternerKey);
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 = ArrayToXml(paraMap);
String xmlStr = HttpKit.post(url, xml);
// 预付商品id
String prepay_id = "";
if (xmlStr.indexOf("SUCCESS") != -1) {
Map<String, String> map = doXMLParse(xmlStr);
prepay_id = (String) map.get("prepay_id");
}
String timeStamp = create_timestamp();
String nonceStr = create_nonce_str();
Map<String, String> payMap = new HashMap<String, String>();
payMap.put("appId", appid);
payMap.put("timeStamp", timeStamp);
payMap.put("nonceStr", nonceStr);
payMap.put("signType", "MD5");
payMap.put("package", "prepay_id=" + prepay_id);
String paySign = getSign(payMap, paternerKey);
payMap.put("pg", prepay_id);
payMap.put("paySign", paySign);
// 拼接并返回json
StringBuilder sBuilder = new StringBuilder("[{");
sBuilder.append("appId:'").append(appid).append("',")
.append("timeStamp:'").append(timeStamp).append("',")
.append("nonceStr:'").append(nonceStr).append("',")
.append("pg:'").append(prepay_id).append("',")
.append("signType:'MD5',")
.append("paySign:'").append(paySign).append("'");
sBuilder.append("}]");
response.getWriter().print(sBuilder.toString());
response.getWriter().close();
} catch (Exception e) {
e.printStackTrace();
}
}
测试结果
