Java开发微信Navicat支付的示例分析
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一:准备工作
1:先去微信公众平台注册一个公众号,选择服务号
2:去微信商户平台注册一个商户号,用于收款
3:在商户号中配置对应的公众号的APPID
4:支付结果异步通知(需要重点注意)
注意:请先详细查看官方文档按步骤开发,一切以官方文档为主 微信Navicat支付官方文档
5:测试的时候一定要使用内网穿透软件,否则回调时会报错
二:开发代码
WeChatPayConfig:
public class WeChatPayConfig { //公众号APPID private String APPID = ""; //商户号KEY private String KEY = ""; //商户号ID private String MCHID = ""; //支付完成后微信回调地址,需要外网能访问要是域名,不能是127.0.0.1跟localhost private String NOTIFY_URL = ""; }
WeChatPayServcie:
public interface WeChatPayServcie { //微信支付下单 public MapgetWxpayUrl(Map sourceMap); //订单查询 public String orderQuery(String out_trade_no); }
@Service public class WeChatPayServiceImpl implements WeChatPayServcie { /** * 微信支付请求 * @param sourceMap * @return */ public MapgetWxpayUrl(Map sourceMap) { SortedMap signParams = new TreeMap (); String nonce_str = UUID.randomUUID().toString().trim().replaceAll("-", ""); signParams.put("appid", PayConfig.APPID); signParams.put("mch_id",PayConfig.MCHID); signParams.put("nonce_str",sourceMap.get("nonce_str")); signParams.put("product_id",sourceMap.get("prod_id")); signParams.put("body",sourceMap.get("body")); signParams.put("out_trade_no",sourceMap.get("out_trade_no")); signParams.put("total_fee",sourceMap.get("total_fee")); signParams.put("spbill_create_ip", WxUtil.getIp()); signParams.put("notify_url",PayConfig.NOTYFLY_URL); signParams.put("trade_type","NATIVE"); String sign = WxUtil.createSign(signParams,PayConfig.KEY); signParams.put("sign",sign); String xmlPackage = WxUtil.parseMapXML(signParams); Map resultMap = new HashMap(); try { String result = HttpUtil.post("https://api.mch.weixin.qq.com/pay/unifiedorder",xmlPackage); resultMap = WxUtil.parseXmlMap(result); } catch (Exception e) { e.printStackTrace(); } String returnCode = (String) resultMap.get("return_code"); String returnMsg = (String) resultMap.get("return_msg"); if (returnCode.equalsIgnoreCase("FAIL")) { throw new RuntimeException(returnMsg); } String result_code = (String) resultMap.get("result_code"); if (result_code.equalsIgnoreCase("FAIL")) { throw new RuntimeException(resultMap.get("err_code_des")); } String code_url = (String) resultMap.get("code_url"); Map map = new HashMap<>(); map.put("code_url",code_url); map.put("out_trade_no",sourceMap.get("out_trade_no")); return map; } /** * 微信支付订单查询 * @param out_trade_no * @return */ public String orderQuery(String out_trade_no) { String nonce_str = UUID.randomUUID().toString().trim().replaceAll("-", ""); SortedMap signParams = new TreeMap<>(); signParams.put("appid", payConfig.getWeChatPorpetties().getAppId()); signParams.put("mch_id",payConfig.getWeChatPorpetties().getMchId()); signParams.put("out_trade_no",out_trade_no); signParams.put("nonce_str",nonce_str); String sign = WxUtil.createSign(signParams,payConfig.getWeChatPorpetties().getApiKey()); signParams.put("sign",sign); String xmlPackage = WxUtil.parseMapXML(signParams); Map resultMap = new HashMap(); try { String result = HttpUtil.post("https://api.mch.weixin.qq.com/pay/orderquery",xmlPackage); resultMap = WxUtil.parseXmlMap(result); } catch (Exception e) { e.printStackTrace(); throw new RuntimeException("渠道网络异常"); } String returnCode = (String) resultMap.get("return_code"); String returnMsg = (String) resultMap.get("return_msg"); if (returnCode.equalsIgnoreCase(PayContants.FAIL)) { throw new RuntimeException(returnMsg); } String result_code = (String) resultMap.get("result_code"); if (result_code.equalsIgnoreCase(PayContants.FAIL)) { throw new RuntimeException(resultMap.get("err_code_des")); } String trade_state = (String) resultMap.get("trade_state"); return trade_state; } }
WeChatPayController:
/** * 微信支付接口 */ @Controller public class WxPayController { @Autowired WeChatPayServcie weChatPayServcie; /** * 微信支付下单 * payID可以不用传自己生成32位以内的随机数就好,要保证不重复 * totalFee金额一定要做判断,判断这笔支付金额与数据库是否一致 */ @RequestMapping("pay") @ResponseBody public MaptoWxpay(HttpServletRequest httpRequest,String payId, String totalFee, String body){ System.out.println("开始微信支付..."); Map map = new HashMap<>(); String nonce_str = UUID.randomUUID().toString().trim().replaceAll("-", ""); //生成一笔支付记录 //拼接支付参数 Map paramMap = new HashMap<>(); paramMap.put("nonce_str", nonce_str); paramMap.put("prod_id", payId); paramMap.put("body", body); paramMap.put("total_fee", totalFee); paramMap.put("out_trade_no", payId); //发送支付请求并获取返回参数与二维码,用于支付与调用查询接口 Map returnMap = weChatPayServcie.getWxpayUrl(paramMap); httpRequest.setAttribute("out_trade_no", payId); httpRequest.setAttribute("total_fee", totalFee); //code_url就是二维码URL,可以把这个URL放到草料二维码中生成微信二维码 httpRequest.setAttribute("code_url", returnMap.get("code_url")); map.put("out_trade_no", payId); map.put("total_fee", String.valueOf(bigDecimal)); map.put("code_url", returnMap.get("code_url")); return map; } /** * 查询微信订单 * ot_trade_no是支付 */ @RequestMapping("query") @ResponseBody public Root orderQuery(String out_trade_no){ return weixinPayServcie.orderQuery(queryCallbackForm.getOut_trade_no()); } /** * 微信支付回调,这个地址就是Config中的NOTYFLY_URL */ @RequestMapping("callback") public void notify_url(HttpServletRequest request, HttpServletResponse response) throws DocumentException, ServletException, IOException,Throwable { System.out.print("微信支付回调获取数据开始..."); String inputLine; String notityXml = ""; try { while ((inputLine = request.getReader().readLine()) != null) { notityXml += inputLine; } request.getReader().close(); } catch (Exception e) { WxUtil.sendXmlMessage(request,response, PayContants.FAIL); throw new RuntimeException("回调数据xml获取失败!"); } if(StringUtils.isEmpty(notityXml)){ WxUtil.sendXmlMessage(request,response, PayContants.FAIL); throw new RuntimeException("回调数据xml为空!"); } Map resultMap = XMLParse.parseXmlMap(notityXml); String returnCode = (String) resultMap.get("return_code"); String returnMsg = (String) resultMap.get("return_msg"); if (returnCode.equalsIgnoreCase(PayContants.FAIL)) { WxUtil.sendXmlMessage(request,response, PayContants.FAIL); throw new RuntimeException(returnMsg); } String resultCode = (String) resultMap.get("result_code"); if (resultCode.equalsIgnoreCase(PayContants.FAIL)) { WxUtil.sendXmlMessage(request,response, PayContants.FAIL); throw new RuntimeException(resultMap.get("err_code_des")); } SortedMap paramMap = new TreeMap<>(); paramMap.put("appid",resultMap.get("appid")); paramMap.put("mch_id",resultMap.get("mch_id")); paramMap.put("nonce_str",resultMap.get("nonce_str")); paramMap.put("body",resultMap.get("body")); paramMap.put("openid", resultMap.get("openid")); paramMap.put("is_subscribe",resultMap.get("is_subscribe")); paramMap.put("trade_type",resultMap.get("trade_type")); paramMap.put("bank_type",resultMap.get("bank_type")); paramMap.put("total_fee",resultMap.get("total_fee")); paramMap.put("fee_type",resultMap.get("fee_type")); paramMap.put("cash_fee",resultMap.get("cash_fee")); paramMap.put("transaction_id",resultMap.get("transaction_id")); paramMap.put("out_trade_no",resultMap.get("out_trade_no")); paramMap.put("time_end",resultMap.get("time_end")); paramMap.put("return_code",resultMap.get("return_code")); paramMap.put("return_msg",resultMap.get("return_msg")); paramMap.put("result_code",resultMap.get("result_code")); String out_trade_no = (String) resultMap.get("out_trade_no"); String sign = SignUtil.createSign(paramMap,WxPayConfig.KEY); String mySign =(String) resultMap.get("sign"); //回调一定要验证签名以防数据被篡改 if(sign.equals(mySign)){ System.out.println("回调签名验证成功!"); //修改业务逻辑,将那笔支付状态改为已支付 } WxUtil.sendXmlMessage(request,response, PayContants.SUCCESS); }else{ WxUtil.sendXmlMessage(request,response, PayContants.FAIL); throw new RuntimeException("签名不一致!"); } } }
WxUtil:
package com.ys.commons.utils.pay; import java.io.BufferedWriter; import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.InetAddress; import java.net.UnknownHostException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; //微信工具类 public class WxUtil { //获取当前IP public static String getIp() { try { String spbill_create_ip = InetAddress.getLocalHost().getHostAddress(); return spbill_create_ip; } catch (UnknownHostException var2) { var2.printStackTrace(); return "获取IP失败..."; } } //输出xml格式 public static void sendXmlMessage(HttpServletRequest request, HttpServletResponse response, String content) { try { String contentXml = ""; OutputStream os = response.getOutputStream(); BufferedWriter resBr = new BufferedWriter(new OutputStreamWriter(os)); resBr.write(contentXml); resBr.flush(); resBr.close(); } catch (IOException var6) { var6.printStackTrace(); } } //生成sign签名 public static String createSign(SortedMap packageParams, String KEY) { StringBuffer sb = new StringBuffer(); Set > es = packageParams.entrySet(); Iterator it = es.iterator(); while(it.hasNext()) { Entry entry = (Entry)it.next(); String k = (String)entry.getKey(); String v = (String)entry.getValue(); if(null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + KEY); String sign = MD5Util.MD5Encode(sb.toString(), "UTF-8").toUpperCase(); return sign; } //将map转为xml public static String parseMapXML(SortedMap map) { String xmlResult = ""; StringBuffer sb = new StringBuffer(); sb.append(" "); Iterator var3 = map.keySet().iterator(); while(var3.hasNext()) { String key = (String)var3.next(); String value = ""; sb.append("<" + key + ">" + value + "" + key + ">"); System.out.println(); } sb.append(" "); xmlResult = sb.toString(); return xmlResult; } //将xml转为map public static MapparseXmlMap(String xml) throws DocumentException { Document document = DocumentHelper.parseText(xml); Element root = document.getRootElement(); List elementList = root.elements(); Map map = new HashMap(); Iterator var5 = elementList.iterator(); while(var5.hasNext()) { Element e = (Element)var5.next(); map.put(e.getName(), e.getText()); } return map; } }
发送请求需要推荐一个非常好用的工具,里面各种常用的工具都封装好了hutool,如果想直接复制代码使用也需要引入此工具的maven库
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