java服务端微信APP支付接口详解

一、微信APP支付接入商户服务中心

[申请流程指引] (https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419317780&token=84f23b4e9746c5963128711f225476cfd49ccf8c&lang=zh_CN)

二、开始开发

1、配置相关的配置信息

1.1、配置appid（Android）、mch_id（ios）、微信支付后的回调地址

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sys.properties配置文件:     appid=wx***************1   mch_id=1********2   notify_url=http://6*.***.***.**/returnmsg.do   //回调通知的地址,一定是要可以直接访问的地址

2、微信支付–下单

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@ResponseBody @RequestMapping(value = "/weixinpay.do", produces = "text/html;charset=UTF-8",method={RequestMethod.POST})   public static String weixinpay(String body, //商品描述       String detail, //商品详情       String attach, //附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据       String out_trade_no, //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       String total_price, //订单总金额，单位为分，详见支付金额       String spbill_create_ip //用户端实际ip         ) throws Exception {       WeixinConfigUtils config = new WeixinConfigUtils();     //参数组     String appid = config.appid;//微信开放平台审核通过的应用APPID     System.out.println("appid是："+appid);     String mch_id = config.mch_id;     System.out.println("mch_id是："+mch_id);     String nonce_str = RandCharsUtils.getRandomString(16);     System.out.println("随机字符串是："+nonce_str);         body = body;//"测试微信支付0.01_2";     detail = detail;//"0.01_元测试开始";     //attach = attach;//"备用参数，先留着，后面会有用的";     //String out_trade_no = OrderUtil.getOrderNo();//"2015112500001000811017342394";       double totalfee =0;     try{       totalfee=Double.parseDouble(total_price);////单位是分，即是0.01元     }catch (Exception e) {       totalfee=0;     }     int total_fee=(int) (totalfee*100);     spbill_create_ip = spbill_create_ip;//"127.0.0.1";       String time_start = RandCharsUtils.timeStart();     System.out.println(time_start);     String time_expire = RandCharsUtils.timeExpire();     System.out.println(time_expire);     String notify_url = config.notify_url;     System.out.println("notify_url是："+notify_url);     String trade_type = "APP";       //参数：开始生成签名     SortedMap parameters = new TreeMap();     parameters.put("appid", appid);     parameters.put("mch_id", mch_id);     parameters.put("nonce_str", nonce_str);     parameters.put("body", body);     //parameters.put("nonce_str", nonce_str);     parameters.put("detail", detail);     parameters.put("attach", attach);     parameters.put("out_trade_no", out_trade_no);     parameters.put("total_fee", total_fee);     parameters.put("time_start", time_start);     parameters.put("time_expire", time_expire);     parameters.put("notify_url", notify_url);     parameters.put("trade_type", trade_type);     parameters.put("spbill_create_ip", spbill_create_ip);       String sign = WXSignUtils.createSign("UTF-8", parameters);     System.out.println("签名是："+sign);         Unifiedorder unifiedorder = new Unifiedorder();     unifiedorder.setAppid(appid);     unifiedorder.setMch_id(mch_id);     unifiedorder.setNonce_str(nonce_str);     unifiedorder.setSign(sign);     unifiedorder.setBody(body);     unifiedorder.setDetail(detail);     unifiedorder.setAttach(attach);     unifiedorder.setOut_trade_no(out_trade_no);     unifiedorder.setTotal_fee(total_fee);     unifiedorder.setSpbill_create_ip(spbill_create_ip);     unifiedorder.setTime_start(time_start);     unifiedorder.setTime_expire(time_expire);     unifiedorder.setNotify_url(notify_url);     unifiedorder.setTrade_type(trade_type);       System.out.println(MD5Utils.md5("fenxiangzhuyi") + "========================");       //构造xml参数     String xmlInfo = HttpXmlUtils.xmlInfo(unifiedorder);       String wxUrl = "https://api.mch.weixin.qq.com/pay/unifiedorder";       String method = "POST";       String weixinPost = HttpXmlUtils.httpsRequest(wxUrl, method, xmlInfo).toString();       System.out.println(weixinPost);       ParseXMLUtils.jdomParseXml(weixinPost);           String json = JsonUtil.xml2jsonString(weixinPost);       System.out.println("=========================================================");       Bean b = JsonUtil.getSingleBean(json, Bean.class);     if(null!=b){       WeixinOrder weixin = b.getXml();       //参数：开始生成签名       SortedMap par = new TreeMap();       par.put("appid", weixin.getAppid());       par.put("partnerid", weixin.getMch_id());       par.put("prepayid", weixin.getPrepay_id());       par.put("package", "Sign=WXPay");       par.put("noncestr", weixin.getNonce_str());         //时间戳        Date date = new Date();        long time = date.getTime();        //mysq 时间戳只有10位 要做处理        String dateline = time + "";        dateline = dateline.substring(0, 10);         par.put("timestamp", dateline);         String signnew = WXSignUtils.createSign("UTF-8", par);       System.out.println("再次签名是："+signnew);           SetPay setPay = new SetPay();         setPay.setAppid(weixin.getAppid());       setPay.setPartnerid(weixin.getMch_id());       setPay.setPrepayid(weixin.getPrepay_id());       setPay.setNoncestr(weixin.getNonce_str());         setPay.setTimestamp(dateline);       setPay.setSign(signnew);       setPay.setPack("Sign=WXPay");         JSONObject js = JSONObject.fromObject(setPay);       StringBuilder msg = new StringBuilder();       msg.append("{\"code\":\"1\",");       msg.append("\"msg\":\"查询成功！\",");       msg.append("\"datas\":");       msg.append(js.toString());       msg.append("}");         System.out.println(js);         return msg.toString();     }     StringBuilder msg = new StringBuilder();     msg.append("{\"code\":\"1\",");     msg.append("\"msg\":\"查询成功！\",");     msg.append("\"datas\":");     msg.append("支付失败！");     msg.append("}");         return msg.toString();     }

2.1、微信支付签名算法sign

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package com.wx.weixincontroller.pay.weixin.Utils;   import java.util.Iterator; import java.util.Map; import java.util.Set; import java.util.SortedMap;   import com.wx.weixin.utils.MD5Utils;   /**  * 微信支付签名  * @author iYjrg_xiebin  * @date 2016年10月25日下午4:47:07  */ public class WXSignUtils {   //http://mch.weixin.qq.com/wiki/doc/api/index.php?chapter=4_3   //商户Key：改成公司申请的即可   //32位密码设置地址：http://www.sexauth.com/ jdex1hvufnm1sdcb0e81t36k0d0f15nc     private static String Key = "***cb**e**ef**c*e*d***e*fd***cb*";     /**    * 微信支付签名算法sign    * @param characterEncoding    * @param parameters    * @return    */   @SuppressWarnings("rawtypes")   public static String createSign(String characterEncoding,SortedMap parameters){         StringBuffer sb = new StringBuffer();     Set es = parameters.entrySet();//所有参与传参的参数按照accsii排序（升序）     Iterator it = es.iterator();     while(it.hasNext()) {       Map.Entry entry = (Map.Entry)it.next();       String k = (String)entry.getKey();       Object v = entry.getValue();       if(null != v && !"".equals(v)           && !"sign".equals(k) && !"key".equals(k)) {         sb.append(k + "=" + v + "&");       }     }     sb.append("key=" + Key);     System.out.println("字符串拼接后是："+sb.toString());     String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();     return sign;   }   }

2.2、POST提交XML格式的参数

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package com.wx.weixincontroller.pay.weixin.Utils;   import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL;   import javax.net.ssl.HttpsURLConnection;   import com. com.wx.weixin.wxcontroller.pay.weixin.entity.Unifiedorder;   /**  * post提交xml格式的参数  * @author iYjrg_xiebin  * @date 2016年10月25日下午3:33:38  */ public class HttpXmlUtils {     /**    * 开始post提交参数到接口    * 并接受返回    * @param url    * @param xml    * @param method    * @param contentType    * @return    */   public static String xmlHttpProxy(String url,String xml,String method,String contentType){     InputStream is = null;     OutputStreamWriter os = null;       try {       URL _url = new URL(url);       HttpURLConnection conn = (HttpURLConnection) _url.openConnection();       conn.setDoInput(true);        conn.setDoOutput(true);        conn.setRequestProperty("Content-type", "text/xml");       conn.setRequestProperty("Pragma:", "no-cache");       conn.setRequestProperty("Cache-Control", "no-cache");       conn.setRequestMethod("POST");       os = new OutputStreamWriter(conn.getOutputStream());       os.write(new String(xml.getBytes(contentType)));       os.flush();         //返回值       is = conn.getInputStream();       return getContent(is, "utf-8");     } catch (MalformedURLException e) {       e.printStackTrace();     } catch (IOException e) {       e.printStackTrace();     } finally{       try {         if(os!=null){os.close();}         if(is!=null){is.close();}       } catch (IOException e) {         e.printStackTrace();       }     }     return null;   }     /**    * 解析返回的值    * @param is    * @param charset    * @return    */   public static String getContent(InputStream is, String charset) {     String pageString = null;     InputStreamReader isr = null;     BufferedReader br = null;     StringBuffer sb = null;     try {       isr = new InputStreamReader(is, charset);       br = new BufferedReader(isr);       sb = new StringBuffer();       String line = null;       while ((line = br.readLine()) != null) {         sb.append(line + "\n");       }       pageString = sb.toString();     } catch (Exception e) {       e.printStackTrace();     } finally {       try {         if (is != null){           is.close();         }         if(isr!=null){           isr.close();         }         if(br!=null){           br.close();         }       } catch (IOException e) {         e.printStackTrace();       }       sb = null;     }     return pageString;   }     /**    * 构造xml参数    * @param xml    * @return    */   public static String xmlInfo(Unifiedorder unifiedorder){     //构造xml参数的时候，至少又是个必传参数     /*      *         wx2421b1c4370ec43b         支付测试         JSAPI支付测试         10000100         1add1a30ac87aa2db72f57a2375d8fec         http://wxpay.weixin.qq.com/pub_v2/pay/notify.v2.php         oUpF8uMuAJO_M2pxb1Q9zNjWeS6o         1415659990         14.23.150.211         1         JSAPI         0CB01533B8C1EF103065174F50BCA001             */       if(unifiedorder!=null){       StringBuffer bf = new StringBuffer();       bf.append("");         bf.append("       bf.append(unifiedorder.getAppid());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getMch_id());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getNonce_str());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getSign());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getBody());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getDetail());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getAttach());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getOut_trade_no());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getTotal_fee());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getSpbill_create_ip());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getTime_start());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getTime_expire());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getNotify_url());       bf.append("]]>");         bf.append("       bf.append(unifiedorder.getTrade_type());       bf.append("]]>");           bf.append("");       return bf.toString();     }       return "";   }           /**    * post请求并得到返回结果    * @param requestUrl    * @param requestMethod    * @param output    * @return    */   public static String httpsRequest(String requestUrl, String requestMethod, String output) {     try{       URL url = new URL(requestUrl);       HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();       connection.setDoOutput(true);       connection.setDoInput(true);       connection.setUseCaches(false);       connection.setRequestMethod(requestMethod);       if (null != output) {         OutputStream outputStream = connection.getOutputStream();         outputStream.write(output.getBytes("UTF-8"));         outputStream.close();       }       // 从输入流读取返回内容       InputStream inputStream = connection.getInputStream();       InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");       BufferedReader bufferedReader = new BufferedReader(inputStreamReader);       String str = null;       StringBuffer buffer = new StringBuffer();       while ((str = bufferedReader.readLine()) != null) {         buffer.append(str);       }       bufferedReader.close();       inputStreamReader.close();       inputStream.close();       inputStream = null;       connection.disconnect();       return buffer.toString();     }catch(Exception ex){       ex.printStackTrace();     }       return "";   }   }

3、微信支付–回调通知业务处理

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//通知处理类 @ResponseBody @RequestMapping(value = "/returnmsg.do", produces = "text/html;charset=UTF-8",method={RequestMethod.POST})    public String returnmsg(HttpServletRequest request, HttpServletResponse response) throws Exception {        // 解析结果存储在HashMap      Map map = new HashMap();      InputStream inputStream = request.getInputStream();        // 读取输入流      SAXReader reader = new SAXReader();      Document document = reader.read(inputStream);      // 得到xml根元素      Element root = document.getRootElement();      // 得到根元素的所有子节点      List elementList = root.elements();        // 遍历所有子节点      for (Element e : elementList) {        map.put(e.getName(), e.getText());      }        JSONObject json = JSONObject.fromObject(map);        System.out.println("===消息通知的结果：" + json.toString() + "==========================");      System.out.println("===return_code===" + map.get("return_code"));      System.out.println("===return_msg===" + map.get("return_msg"));      System.out.println("===out_trade_no===" + map.get("out_trade_no"));        //验证签名的过程        //判断是否支付成功      if(map.get("return_code").equals("SUCCESS")) {            /**          *支付成功之后的业务处理          */            // 释放资源          inputStream.close();          inputStream = null;              //bis.close();          return "SUCCESS";        }        }      if (map.get("return_code").equals("FAIL")) {          /**         *支付失败后的业务处理         */            // 释放资源          inputStream.close();            inputStream = null;            return "SUCCESS";        }          }        // 释放资源      inputStream.close();      inputStream = null;        return "SUCCESS";      }

如有不足请指教.