点击支付在js中处理请求：
var callbackUrl = 'http://www.xxxxx.com/reader/charges.html?uid='+localUser.id+"&price="+price;
window.location.href = callbackUrl;
ajax提交请求：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>微信充值中...</title> </head> <body> </body> <script src="javascripts/config.js" type="text/javascript"></script> <script src="javascripts/md5.min.js"></script> <script src="javascripts/jquery-3.2.1.min.js"></script> <script src="javascripts/util.js"></script> <script> var uid = getQueryString('uid'); var price = getQueryString('price'); $.ajax({ type: 'post', url: '/reader/wxpay/wxCharges.dom', data: {uid:uid,price:price}, success: function (data) {
//后台返回调起微信支付的链接，直接跳转过去即可 window.location.href=data; } }) function getQueryString(name) { var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i"); var r = window.location.search.substr(1).match(reg); if (r != null) { return unescape(r[2]); } return null; } </script> </html>
后台处理请求：
public String wxCharges(String price,String uid) {
try{
logger.info("before insert charge...");
Charge charge = new Charge();
charge.setId(IdGenerate.getId());
charge.setCdate(sdf.format(new Date()));
charge.setCoin(price);
charge.setStatus("0");
charge.setMoney(String.valueOf(Integer.valueOf(price)/100));
charge.setUid(uid);
charge.setZhifutype("wx");
charge.setXstype("web");
chargeMapper.insertCharge(charge);
logger.info("after insert charge...");
//订单号
String tradeNo = charge.getId();
String payUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";
String ip = SpringUtils.getRequestIP();
System.out.println("ip:"+ip);
String stringA = "appid="+WxPayParam.APPID+"&attach=XXXX在线充值&body=xxxx在线充值&" +
"mch_id="+WxPayParam.PAY_MCH_ID+"&nonce_str=1add1a30ac87aa2db72f57a2375d8fec¬ify_url=" +
"http://www.xxxx.com/reader/wxpay/wxChargeCallback.dom&out_trade_no=" + tradeNo +
"&scene_info={"h5_info": {"type":"Wap","wap_url": "http://www.xxxx.com/reader/home.html","wap_name": "xxxx在线充值"}}&spbill_create_ip=" + ip + "&total_fee=" + price +"&trade_type=MWEB&key=" + WxPayParam.API_KEY;
System.out.println(stringA);
String sign = DigestUtils.md5Hex(stringA).toUpperCase();
// String sign = MD5(stringA).toUpperCase();
String xml = "<xml>
" +
" <appid>"+WxPayParam.APPID+"</appid>
" +
" <attach>xxxx在线充值</attach>
" +
" <body>xxxx在线充值</body>
" +
" <mch_id>"+WxPayParam.PAY_MCH_ID+"</mch_id>
" +
" <nonce_str>1add1a30ac87aa2db72f57a2375d8fec</nonce_str>
" +
" <notify_url>http://www.xxxx.com/reader/wxpay/wxChargeCallback.dom</notify_url>
" +
" <out_trade_no>" + tradeNo + "</out_trade_no>
" +
" <spbill_create_ip>" + ip + "</spbill_create_ip>
" +
" <total_fee>" + price + "</total_fee>
" +
" <trade_type>MWEB</trade_type>
" +
" <scene_info>{"h5_info": {"type":"Wap","wap_url": "http://www.xxxx.com/reader/home.html","wap_name": "xxxx在线充值"}}</scene_info>
" +
" <sign>" + sign + "</sign>
" +
" </xml>";
System.out.println(xml);
HttpClient client = new HttpClient();
client.getParams().setContentCharset("utf-8");
PostMethod post1 = new PostMethod(payUrl);
post1.setRequestBody(xml);
post1.addRequestHeader("accept", "application/xml"); // 视具体情况而定，可以从浏览器或postman查看下请求的header
post1.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"utf-8"); //这里设置具体编码，视具体接口而定
post1.setRequestHeader("Content-type", "text/xml; charset=UTF-8");
client.executeMethod(post1);
String response1 = post1.getResponseBodyAsString();
logger.info("response1: " + response1);
String str=response1.substring(response1.indexOf("<mweb_url><![CDATA[")+"<mweb_url><![CDATA[".length(),response1.indexOf("]]></mweb_url>"));
//redirect_url是支付成功之后你自己想要跳转的页面，默认是没有的，需要自己添加，如果不添加，支付完之后还会回到支付页面，一直循环
return (str +"&redirect_url=http://www.xxxxx.com/reader/home.html");
} catch (Exception e){
logger.error("error: ", e);
return null;
}
}
微信支付回调：
public String wxChargeCallback() {
logger.info("wx charge call back...");
try {
Map<String, String> map = getWxCallbackParams();
String result_code = map.get("result_code");
String out_trade_no = map.get("out_trade_no");
String total_fee = map.get("total_fee");
logger.info("result_code: " + result_code);
logger.info("out_trade_no: " + out_trade_no);
logger.info("total_fee: " + total_fee);
//处理业务逻辑
if ("SUCCESS".equals(result_code)) {
//微信支付成功，设置支付金额
Charge charge = new Charge();
charge.setId(out_trade_no);
List<Charge> charges = chargeMapper.selectCharge(charge);
if (charges.size() > 0) {
Charge c = charges.get(0);
logger.info(c);
//实际支付金额（元）
logger.info("before callback update charge");
c.setStatus("1");
chargeMapper.updateCharge(c);
logger.info("after callback update charge");
//更新用户币量
logger.info("before callback update user");
User user = new User();
user.setId(c.getUid());
List<User> users = userMapper.selectUser(user);
if (users.size() > 0) {
User user1 = users.get(0);
logger.info(user1);
user1.setBalance("" + (Integer.parseInt(user1.getBalance()) + Integer.parseInt(c.getCoin())));
userMapper.updateUser(user1);
}
logger.info("after callback update user");
}
return returnXML(result_code);
}
return returnXML("FAIL");
} catch (Exception e) {
e.printStackTrace();
return returnXML("FAIL");
}
}
/**
* 获取微信回调参数
*/
private Map getWxCallbackParams() throws IOException, JDOMException {
HttpServletRequest request = SpringUtils.getRequest();
BufferedReader reader;
reader = request.getReader();
String line;
String xmlString;
StringBuffer inputString = new StringBuffer();
while ((line = reader.readLine()) != null) {
inputString.append(line);
}
xmlString = inputString.toString();
request.getReader().close();
logger.info("微信回调数据：" + xmlString);
return XmlUtils.doXMLParse(xmlString);
}