微信支付流程

都是我自己工作中开发的，亲测可用，不喜勿喷。

controller中我是这么写的，你们需要根据自己的业务需求改动。ResponseBean是我自己封装的，你们可以改成你们想要的形式。

/**

* 微信统一下单接口

* @return

*/

@RequestMapping(value = "/doUnifiedOrder", method = RequestMethod.POST)

public ResponseBean doUnifiedOrder(@RequestBody Map req) {

Map resultMap=new HashMap();

String openid = (String) req.get("openId");

WXPay wxpay =null;

try {

//初始化证书

myConfig.initCert();

wxpay= new WXPay(myConfig);

} catch (Exception e) {

e.printStackTrace();

}

//生成的随机字符串

String nonce_str = WXPayUtil.generateNonceStr();

//获取客户端的ip地址

//获取本机的ip地址

InetAddress addr = null;

try {

addr = InetAddress.getLocalHost();

} catch (UnknownHostException e) {

e.printStackTrace();

}

//支付金额，需要转成字符串类型，否则后面的签名会失败

String payOutMoney = WxMoney.changeY2F(String.valueOf(req.get("money")));

String tradeName = (String) req.get("tradeName");

if(tradeName!=null&&tradeName.length()>0){

}else{

tradeName = "课程支付";

}

String body = tradeName;

//商户订单号

String out_trade_no= WXPayUtil.generateNonceStr();

//统一下单接口参数

HashMap data = new HashMap();

data.put("appid", 你的appid);

data.put("mch_id", 商户id);

data.put("nonce_str", nonce_str);

data.put("body", body);

data.put("out_trade_no",out_trade_no);

data.put("total_fee", payOutMoney);

data.put("spbill_create_ip", "127.0.0.1");

data.put("notify_url", 回调地址);

data.put("trade_type","JSAPI");

data.put("openid", openid);

try {

Map rMap = wxpay.unifiedOrder(data);

String return_code = (String) rMap.get("return_code");

String result_code = (String) rMap.get("result_code");

String nonceStr = WXPayUtil.generateNonceStr();

resultMap.put("nonceStr", nonceStr);

Long timeStamp = System.currentTimeMillis() / 1000;

if ("SUCCESS".equals(return_code) && return_code.equals(result_code)) {

String prepayid = rMap.get("prepay_id");

resultMap.put("package", "prepay_id="+prepayid);

resultMap.put("signType", "MD5");

//这边要将返回的时间戳转化成字符串，不然小程序端调用wx.requestPayment方法会报签名错误

resultMap.put("timeStamp", timeStamp + "");

//再次签名，这个签名用于小程序端调用wx.requesetPayment方法

resultMap.put("appId",myConfig.getAppID());

String sign = WXPayUtil.generateSignature(resultMap, myConfig.getKey());

resultMap.put("paySign", sign);

resultMap.put("out_trade_no",out_trade_no);

ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),"微信支付",resultMap);

return responseBean;

}else{

ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),"微信支付失败","微信支付失败");

return responseBean;

}

} catch (Exception e) {

ResponseBean responseBean = new ResponseBean(HttpStatus.OK.value(),"微信支付失败","微信支付失败");

e.printStackTrace();

return responseBean;

}

}