前言:最近公司接了个商城项目,被分到了做微信支付,支付宝支付和stripe国际支付,在此记录一下。
正文:
微信支付接入方式分很多种如下:
比如h5,大部分业务几乎都在后台,而app支付一半在前端一半在后端,我这里讲的是app支付
官方说明文档地址:https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8_1
想要调试支付,必须得注册成商户,需要有营业执照什么的,不像微信公众号会有测试公众号,这也是我们比较难测试的地方
时序图:
从上面看出来,后端的工作只有三个:
1.生成加密的支付数据交给前端(统一下单,链接:https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1)
2.编写后台回调(支付结果通知,链接:https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_7&index=3)
3.查询支付结果(查询订单,链接:https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_2&index=4)
所以在app支付中我们后端只需要给前端准备数据,和接受回调就行了,还有一个查询订单支付结果,一共只3个接口需要编写,相对于h5少了很多东西。
在这里我展示统一下单,和回调方法:
第一步:
准备商户数据
package com.otcbi.pay.service.impl;
import com.alibaba.fastjson.JSONObject;
import com.otcbi.coin.common.exception.ApiException;
import com.otcbi.coin.common.exception.ApiResponMessage;
import com.otcbi.common.dto.OperateResult;
import com.otcbi.pay.dto.ShopOrder;
import com.otcbi.pay.entity.WechatOrder;
import com.otcbi.pay.service.IWechatOrderService;
import com.otcbi.pay.service.WeiXinPayService;
import com.otcbi.pay.utils.MD5Util;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.ByteArrayRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.util.*;
@Service
public class WeiXinPayServiceImpl implements WeiXinPayService {
protected Logger logger = LoggerFactory.getLogger(WeiXinPayServiceImpl.class);
// 正在处理的订单号
public static Set<String> processOrder = new HashSet<String>();
@Value("${wechat.appid}")
private String appidConfig;
//商户id
@Value("${wechat.mchid}")
private String mchidConfig;
@Value("${wechat.apikey}")
private String apiKeyCofig;
@Value("${wechat.callback}")
private String wechatCallBack;
@Value("${wechat.lostTime}")
private String lostTime;
@Value("${wechat.unifiedorderUrl}")
private String unifiedorderUrl;
private static Set<String> commonIds = new HashSet<String>();
@Autowired
private IWechatOrderService iWechatOrderService;
@Override
public OperateResult<Map<String, Object>> buildCommonPay(String ip, ShopOrder shopOrder) {
try {
if (commonIds.add(String.valueOf(shopOrder.getUserId()))) {
//简单描述
String productName = shopOrder.getUserId() + "发起支付" + (shopOrder.getMoney()) + "元";
return buildPrePayInfo(ip, shopOrder.getMoney().multiply(new BigDecimal(100)).intValue(), productName, shopOrder.getOrderId(), shopOrder.getUserId());
} else {
throw new ApiException(ApiResponMessage.SHOP_GOODS_ORDER_PAYING, null);
}
} catch (Exception e) {
e.printStackTrace();
throw new ApiException(ApiResponMessage.SHOP_GOODS_WEIXIN_PAY_ERROR, null);
} finally {
commonIds.remove(String.valueOf(shopOrder.getUserId()));
}
}
/**
* 生成支付的字符串
*
* @param ip
* @param money
* @param productName
* @param orderId
* @return
*/
private OperateResult<Map<String, Object>> buildPrePayInfo(String ip, int money, String productName, String orderId, Long userId) throws Exception {
//组装参数
HashMap<String, String> map = genProductArgs(ip, money, productName, orderId, userId);
String entity = map.get("xmlString");
String id = map.get("id");
//用于更新状态
WechatOrder wechatOrder = iWechatOrderService.getById(id);
try {
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(unifiedorderUrl);
postMethod.setRequestEntity(new ByteArrayRequestEntity(entity.getBytes()));
int statusCode = httpClient.executeMethod(postMethod);
byte[] responseByte = postMethod.getResponseBody();
String responseBody = new String(responseByte, "UTF-8");
if (statusCode == 200) {
// 成功
JSONObject obj = xml2jsonObject(responseBody);
if (obj.containsKey("prepay_id")) {
//支付发起成功
return buildPayInfo(obj.getString("prepay_id"), wechatOrder);
} else {
wechatOrder.setModifyTime(LocalDateTime.now());
wechatOrder.setState(2);
wechatOrder.setRemark(obj.toJSONString());
iWechatOrderService.updateById(wechatOrder);
//请求支付失败
logger.error("微信支付失败" + obj.toJSONString());
throw new ApiException(ApiResponMessage.SHOP_GOODS_WEIXIN_PAY_ERROR, null);
}
} else {
wechatOrder.setModifyTime(LocalDateTime.now());
wechatOrder.setState(2);
wechatOrder.setRemark(Integer.toString(statusCode) + ":" + responseBody);
iWechatOrderService.updateById(wechatOrder);
throw new ApiException(ApiResponMessage.SHOP_GOODS_WEIXIN_PAY_ERROR, null);
}
} catch (Exception e) {
wechatOrder.setModifyTime(LocalDateTime.now());
wechatOrder.setState(2);
iWechatOrderService.updateById(wechatOrder);
throw new ApiException(ApiResponMessage.SHOP_GOODS_WEIXIN_PAY_ERROR, null);
}
}
private OperateResult<Map<String, Object>> buildPayInfo(String prepay_id, WechatOrder wechatOrder) {
List<String> keys = new ArrayList<String>();
Map<String, Object> obj = new HashMap<>();
obj.put("appid", appidConfig);
keys.add("appid");
obj.put("noncestr", genNonceStr());
keys.add("noncestr");
obj.put("package", "Sign=WXPay");
keys.add("package");
obj.put("partnerid", mchidConfig);
keys.add("partnerid");
obj.put("prepayid", prepay_id);
keys.add("prepayid");
obj.put("timestamp", (int) (System.currentTimeMillis() / 1000));
keys.add("timestamp");
obj.put("appid", appidConfig);
obj.put("partnerid", mchidConfig);
String sign = genPackageSign(keys, obj, apiKeyCofig);
obj.put("sign", sign);
//更新状态
wechatOrder.setState(1);
wechatOrder.setModifyTime(LocalDateTime.now());
iWechatOrderService.updateById(wechatOrder);
HashMap<String, Object> argmap = new HashMap<>();
argmap.put("msg", obj.toString());
return new OperateResult<Map<String, Object>>(argmap);
}
private String genNonceStr() {
Random random = new Random();
return MD5Util.getMD5(String.valueOf(random.nextInt(10000)).getBytes());
}
private static String genPackageSign(List<String> keys, Map<String, Object> params,
String API_KEY) {
StringBuilder sb = new StringBuilder();
for (String key : keys) {
sb.append(key);
sb.append("=");
sb.append(params.get(key));
sb.append('&');
}
sb.append("key=");
sb.append(API_KEY);
System.out.println("sign:" + sb);
String packageSign = MD5Util.getMD5(sb.toString().getBytes())
.toUpperCase();
return packageSign;
}
private String toXml(Map<String, Object> params) {
StringBuilder sb = new StringBuilder();
sb.append("<xml>");
for (Iterator<String> localIterator = params.keySet().iterator(); localIterator
.hasNext(); ) {
String key = (String) localIterator.next();
sb.append("<" + key + ">");
sb.append(params.get(key));
sb.append("</" + key + ">");
}
sb.append("</xml>");
return sb.toString();
}
private JSONObject xml2jsonObject(String xmlString)
throws DocumentException {
Document doc = DocumentHelper.parseText(xmlString);
Element rootElement = doc.getRootElement();
Map map = new HashMap();
ele2map(map, rootElement);
JSONObject obj = new JSONObject(map);
return obj;
}
private void ele2map(Map map, Element ele) {
List elements = ele.elements();
if (elements.size() == 0) {
map.put(ele.getName(), ele.getText());
} else if (elements.size() == 1) {
Map tempMap = new HashMap();
ele2map(tempMap, (Element) elements.get(0));
map.put(ele.getName(), tempMap);
} else {
for (Iterator localIterator = elements.iterator(); localIterator
.hasNext(); ) {
Element element = (Element) localIterator.next();
ele2map(map, element);
}
}
}
/**
* 生成商品参数
*
* @param ip 用户ip
* @param total_fee 一共多少钱
* @param productName 商品名称
* @return
*/
private HashMap<String, String> genProductArgs(String ip, int total_fee, String productName, String buyProductId, Long userId) {
WechatOrder wechatOrder = new WechatOrder();
String nonceStr = genNonceStr();
Map<String, Object> params = new HashMap<String, Object>();
List<String> keys = new ArrayList<String>();
params.put("appid", appidConfig);// 公众账号ID
wechatOrder.setAppId(appidConfig);
keys.add("appid");
params.put("body", productName);// 商品或支付单简要描述
keys.add("body");
wechatOrder.setBody(productName);
params.put("mch_id", mchidConfig);// 商户号
wechatOrder.setMchId(mchidConfig);
keys.add("mch_id");
params.put("nonce_str", nonceStr);// 随机字符串,不长于32位。推荐随机数生成算法
keys.add("nonce_str");
wechatOrder.setNonceStr(nonceStr);
params.put("notify_url", wechatCallBack);// 接收微信支付异步通知回调地址
keys.add("notify_url");
wechatOrder.setNotifyUrl(wechatCallBack);
params.put("out_trade_no", buyProductId);// 商户系统内部的订单号,32个字符内、可包含字母,
// 其他说明见商户订单号
keys.add("out_trade_no");
wechatOrder.setOutTradeNo(buyProductId);
params.put("spbill_create_ip", ip);// APP和网页支付提交用户端ip,Native支付填调用微信支付API的机器IP。
keys.add("spbill_create_ip");
wechatOrder.setSpbillCreateIp(ip);
params.put("time_expire",
formatDate(System.currentTimeMillis() + Long.valueOf(lostTime) * 60L * 1000L));// 超时时间
keys.add("time_expire"); // 10分钟
wechatOrder.setTimeExpire(formatDate(System.currentTimeMillis() + 10L * 60L * 1000L));
params.put("total_fee", total_fee);// 订单总金额,只能为整数,详见支付金额
keys.add("total_fee");
wechatOrder.setTotalFee(total_fee);
params.put("trade_type", "APP");// 取值如下:JSAPI,NATIVE,APP,WAP,详细说明见参数规定
keys.add("trade_type");
wechatOrder.setTradeType("APP");
//是通用的
params.put("appid", appidConfig);// 公众账号ID
wechatOrder.setAppId(appidConfig);
params.put("mch_id", mchidConfig);// 商户号
wechatOrder.setMchId(mchidConfig);
params.put("attach", userId);
wechatOrder.setUserId(userId);
wechatOrder.setAttach(userId.toString());
String sign = genPackageSign(keys, params, apiKeyCofig);// 生成sign
//是通用的
//sign = genPackageSign(keys, params, apikey);// 生成sign
params.put("sign", sign);// 签名
wechatOrder.setSign(sign);
wechatOrder.setState(0);// 是否冲值成功
wechatOrder.setCreateTime(LocalDateTime.now());// 创建时间
String xmlstring = toXml(params);// 转成xml
//变成传过来的 回调的时候好判读
wechatOrder.setNotifyUrl(wechatCallBack);
iWechatOrderService.save(wechatOrder);
HashMap<String, String> map = new HashMap<>();
map.put("xmlString", xmlstring);
map.put("id", wechatOrder.getId().toString());
return map;
}
/**
* 处理微信支付回调回来的方法
*
* @param xmlStr 微信返回来的信息
* @return
*/
@Override
public String weiXinCallBack(String xmlStr) {
Map<String, Object> reslut = new HashMap<String, Object>();
String out_trade_no = "";
try {
JSONObject res = xml2jsonObject(xmlStr);
System.out.println("微信回调:" + res.toJSONString());
String return_code = res.getString("return_code");
if ("SUCCESS".equals(return_code)) {
String appid = res.getString("appid");// 微信分配的公众账号ID
String bank_type = res.getString("bank_type");// 银行类型,采用字符串类型的银行标识,银行类型见附表
int cash_fee = res.getInteger("cash_fee");// 现金支付金额订单现金支付金额,详见支付金额
String fee_type = res.getString("fee_type");// 货币类型,符合ISO
// 4217标准的三位字母代码,默认人民币:CNY,其他值列表详见货币类型
String is_subscribe = res.getString("is_subscribe");// 用户是否关注公众账号,Y-关注,N-未关注,仅在公众账号类型支付有效
String mch_id = res.getString("mch_id");// 微信支付分配的商户号
String nonce_str = res.getString("nonce_str");// 随机字符串,不长于32位
String openid = res.getString("openid");// 用户在商户appid下的唯一标识
out_trade_no = res.getString("out_trade_no");// 商户系统的订单号,与请求一致。
String result_code = res.getString("result_code");// 业务结果
// SUCCESS/FAIL
// 支付结果
String sign = res.getString("sign");// 签名,详见签名算法
String time_end = res.getString("time_end");// 支付完成时间,格式为yyyyMMddHHmmss,如2009年12月25日9点10分10秒表示为20091225091010。其他详见时间规则
int total_fee = res.getInteger("total_fee");// 订单总金额,单位为分
String trade_type = res.getString("trade_type");// 交易类型
// JSAPI、NATIVE、APP
String transaction_id = res.getString("transaction_id");// 微信支付订单号
if (!processOrder.add(out_trade_no)) {
reslut.put("return_code", "FAIL");
return toXml(reslut);
}
//业务代码-----------------
reslut.put("return_code", "SUCCESS");
return toXml(reslut);
} else {
System.out.println("支付失败");
reslut.put("return_code", "FAIL");
return toXml(reslut);
}
} catch (DocumentException e) {
e.printStackTrace();
reslut.put("return_code", "FAIL");
return toXml(reslut);
} finally {
processOrder.remove(out_trade_no);
}
}
private static SimpleDateFormat format = new SimpleDateFormat(
"yyyyMMddHHmmss");
private static String formatDate(long date) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(date);
return format.format(calendar.getTime());
}
}
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主要的代码都在上面,删除掉业务代码即可