微信支付wxpay -- 移动端app第二章节 -- java 后端代码

一共需要5处

1.pom，添加如下依赖

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<dependency>    <groupId>com.github.wxpaygroupId>    <artifactId>wxpay-sdkartifactId>    <version>0.0.3version> dependency>

2.配置文件（文件夹）：

WxpayConfig.properties

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#微信支付配置 #移动端appid APP_ID = wx3d3c125230d2ba**   #商户号 BUSINESS_CODE = 153982***   #秘钥--sign获取需要的，在  账户中心-->api安全--api秘钥设置 API_KEY = gin201907***********   APIV3_KEY = gin2*******   #签名类型   HMAC-SHA256和MD5，默认为MD5 SIGN_TYPE = MD5   #证书地址 PEM_ADDRESS = /wxConfig/**/apiclient_cert.p12   #异步通知地址（请注意必须是外网） NOTIFY_URL =http://***/wxAppPay/notify     #公众号的appID --待确定--- #GZH_APP_ID = wxcfe45ec****

同时可以再同目录文件夹放入证书，微信支付部分功能需要证书

3. 生成sign的util类：WxMD5Util

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import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Arrays; import java.util.Map; import java.util.Set;   /**  * Created by Mafy on 2019/7/9.  * 该类是生成签名用  */ public class WxMD5Util {       public static String getSign(Map data) throws Exception {         WXConfigUtil config = WXConfigUtil.initWXconfigUtil();         Set keySet = data.keySet();         String[] keyArray = keySet.toArray(new String[keySet.size()]);         Arrays.sort(keyArray);         StringBuilder sb = new StringBuilder();         for (String k : keyArray) {             if (k.equals(WXPayConstants.FIELD_SIGN)) {                 continue;             }             if (data.get(k).trim().length() > 0) // 参数值为空，则不参与签名                 sb.append(k).append("=").append(data.get(k).trim()).append("&");         }         sb.append("key=").append(config.getKey());         MessageDigest md = null;         try {             md = MessageDigest.getInstance("MD5");         } catch (NoSuchAlgorithmException e) {             e.printStackTrace();         }         byte[] array = new byte[0];         try {             array = md.digest(sb.toString().getBytes("UTF-8"));         } catch (UnsupportedEncodingException e) {             e.printStackTrace();         }         StringBuilder sb2 = new StringBuilder();         for (byte item : array) {             sb2.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));         }         return sb2.toString().toUpperCase();     } }

4.获取配置文件的配置类--该处使用单例模式

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import com.github.wxpay.sdk.WXPayConfig; import org.springframework.util.ObjectUtils;   import java.io.*; import java.util.Properties;   /**  * Created by Mafy on 2019/7/9.  */ public class WXConfigUtil implements WXPayConfig{     Properties properties= null;     private byte[] certData;       private static WXConfigUtil wxConfigUtil = new WXConfigUtil();       public static WXConfigUtil initWXconfigUtil(){         return wxConfigUtil;     }       private WXConfigUtil() {         String certPath = PropertiesUtil.class.getResource(getProperties().getProperty("PEM_ADDRESS")).getPath();//从微信商户平台下载的安全证书存放的路径         InputStream certStream = null;         try {             File file = new File(certPath);             certStream = new FileInputStream(file);             this.certData = new byte[(int) file.length()];             certStream.read(this.certData);           } catch (IOException e) {             e.printStackTrace();         }finally {             if(!ObjectUtils.isEmpty(certStream)){                 try {                     certStream.close();                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }     }       @Override     public String getAppID() {         return getProperties().getProperty("APP_ID");     }       //parnerid，商户号     @Override     public String getMchID() {         return getProperties().getProperty("BUSINESS_CODE");     }       @Override     public String getKey() {         return getProperties().getProperty("API_KEY");     }       @Override     public InputStream getCertStream() {         ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);         return certBis;     }       @Override     public int getHttpConnectTimeoutMs() {         return 8000;     }       @Override     public int getHttpReadTimeoutMs() {         return 10000;     }       Properties getProperties() {         if(null == properties) {             properties = PropertiesUtil.getProperties("/wxConfig/WxpayConfig.properties");         }         return properties;     } }

5.调用支付接口的controller：WxAppPayController

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import com.alibaba.fastjson.JSONObject; import com.github.wxpay.sdk.WXPay; import com.github.wxpay.sdk.WXPayUtil; import com.xinlianpu.util.PropertiesUtil; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody;   import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.HashMap; import java.util.Map; import java.util.Properties;   /**  * Created by Mafy on 2019/7/9.  */ @Controller @ResponseBody @RequestMapping("/wxAppPay") public class WxAppPayController {       static Properties properties= null;       final static Logger logger = LoggerFactory.getLogger(WxAppPayController.class);   //    @Resource //    private WxPayService wxPayService;       //异步通知地址（请注意必须是外网）     public static final String NOTIFY_URL = getProperties().getProperty("NOTIFY_URL");     //交易类型，JSAPI--JSAPI支付（或小程序支付）、NATIVE--Native支付、APP--app支付，MWEB--H5支付     public static final String TRADE_TYPE_APP = "APP";         /**      * 统一下单--不需要证书      * 包括生成预支付订单-->订单生成-->返回订单数据到前端      * 官方文档:https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1      * @param jsonObject      * @return      * @throws Exception      */     @RequestMapping(value = "/pay",method = RequestMethod.POST) //    public Map wxPay(@RequestParam(value = "userId") String user_id, @RequestParam(value = "totalFee") String total_fee) throws Exception {     public DataResponse wxPayUnEncryption(@RequestBody JSONObject jsonObject) throws Exception {         logger.info("下单支付，app传过来的参数：{}",jsonObject);           DataResponse dataResponse = DataResponse.success(); //        String user_id = TokenManager.getUserId();         String user_id = "123"; //        String total_fee = jsonObject.getString("totalFee");//总金额         String total_fee = "1";//总金额--分         String spbillCreateIp = jsonObject.getString("spbillCreateIp");//点击支付按钮的机器的ip //        String spbillCreateIp = "0.01";//点击支付按钮的机器的ip             Map map = null;         try { //            String attach = "{\"user_id\":\"" + user_id + "\"}";//扩展字段，原样返回             String attach = "扩展字段";//扩展字段，原样返回             //请求预支付订单             Map result = dounifiedOrder(attach, total_fee,spbillCreateIp);             logger.info("下单之前，预支付返回信息：{}",JSONObject.toJSON(result));             //可判断改预支付订单的数据是否正确             //预支付订单之后，生成带签名的客户端您支付信息             map = new HashMap<>();               //返回APP端的数据             //参加调起支付的签名字段有且只能是6个，分别为 appid、partnerid、prepayid、package、noncestr 和 timestamp，而且都必须是小写---start--             map.put("appid", result.get("appid"));             map.put("partnerid", result.get("mch_id"));             map.put("prepayid", result.get("prepay_id"));             map.put("package", "Sign=WXPay");             map.put("noncestr", result.get("nonce_str"));             String signTimstamp = String.valueOf(System.currentTimeMillis() / 1000);             map.put("timestamp", signTimstamp);//单位为秒             //参加调起支付的签名字段有且只能是6个，分别为appid、partnerid、prepayid、package、noncestr和timestamp，而且都必须是小写---end--                 Map mobileParam = new HashMap<>();             mobileParam.put("appId", result.get("appid"));             mobileParam.put("partnerId", result.get("mch_id"));             mobileParam.put("prepayId", result.get("prepay_id"));             mobileParam.put("packageValue", "Sign=WXPay");//？？？             mobileParam.put("nonceStr", result.get("nonce_str"));             mobileParam.put("timeStamp", signTimstamp);//单位为秒             //----这里不要使用请求预支付订单时返回的签名-------             mobileParam.put("sign", WxMD5Util.getSign(map));             mobileParam.put("extData", attach);             logger.info("支付返回参数：{}",JSONObject.toJSONString(map));             logger.info("返回移动端的参数：{}",JSONObject.toJSONString(mobileParam));             dataResponse.setData(mobileParam);         } catch (Exception e) {             e.printStackTrace();             return DataResponse.failure();         }         return dataResponse;     }         /**      * 微信退款接口--申请退款      * @param jsonObject      * @return      */     public DataResponse wxRefund(@RequestBody JSONObject jsonObject){         DataResponse model= DataResponse.success();         String orderId = jsonObject.getString("orderId");//订单ID         try {             WXConfigUtil config = WXConfigUtil.initWXconfigUtil();             WXPay wxpay = new WXPay(config);             Map data = new HashMap<>();                 Map refund = wxpay.refund(data);         } catch (Exception e) {             e.printStackTrace();         }           return model;     }           /**      *   支付异步结果通知，我们在请求预支付订单时传入的地址--无参数      *   官方文档 ：https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_7&index=3      */     @RequestMapping(value = "/notify", method = {RequestMethod.GET, RequestMethod.POST})     public String wxPayNotifyUnEncryption(HttpServletRequest request, HttpServletResponse response) {         String resXml = "";         try {             InputStream inputStream = request.getInputStream();             //将InputStream转换成xmlString             BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));             StringBuilder sb = new StringBuilder();             String line = null;             try {                 while ((line = reader.readLine()) != null) {                     sb.append(line + "\n");                 }             } catch (IOException e) {                 System.out.println(e.getMessage());             } finally {                 try {                     inputStream.close();                 } catch (IOException e) {                     e.printStackTrace();                 }             }             resXml = sb.toString();             String result = payBack(resXml);             return result;         } catch (Exception e) {             logger.info("微信手机支付失败:" + e.getMessage());             System.out.println("微信手机支付失败:" + e.getMessage());             String result = "" + "" + "" + " ";             return result;         }     }         /**      * 调用官方SDK 获取预支付订单等参数      *      * @param attach    额外参数      * @param total_fee 总价      * @return      * @throws Exception      */     public Map dounifiedOrder(String attach, String total_fee,String spbillCreateIp) throws Exception {         logger.info("进入调用官方sdk方法，参数：{}，{}",attach,total_fee);         Map returnMap = new HashMap<>();         WXConfigUtil config = WXConfigUtil.initWXconfigUtil();         WXPay wxpay = new WXPay(config);         Map data = new HashMap<>();         //生成商户订单号，不可重复         String out_trade_no = "wxpay" + System.currentTimeMillis();           data.put("appid", config.getAppID());//应用ID         data.put("mch_id", config.getMchID());//商户号         data.put("nonce_str", WXPayUtil.generateNonceStr());//随机字符串，不长于32位。推荐随机数生成算法         String body = "新脸谱微信订单支付-测试-"+ System.currentTimeMillis();         data.put("body", body); //商品描述         data.put("out_trade_no", out_trade_no); //商户订单号         data.put("total_fee", total_fee); //总金额         data.put("spbill_create_ip", spbillCreateIp);//自己的服务器IP地址 ---点击支付的机器IP         data.put("notify_url", NOTIFY_URL);//异步通知地址（请注意必须是外网）         data.put("trade_type", TRADE_TYPE_APP);//交易类型         data.put("attach", 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 sign1 = WxMD5Util.getSign(data);         data.put("sign", sign1); //签名         logger.info("生成预订单的参数，{}", JSONObject.toJSON(data));         try {             //使用官方API请求预付订单             Map response = wxpay.unifiedOrder(data);             logger.info("预订单的返回结果，{}", JSONObject.toJSON(response));             String returnCode = response.get("return_code");    //获取返回码             //若返回码为SUCCESS，则会返回一个result_code,再对该result_code进行判断             if (returnCode.equals("SUCCESS")) {//主要返回以下5个参数                 logger.info("预订单的返回结果SUCCESS，{}", JSONObject.toJSON(response));                 String resultCode = response.get("result_code");                 returnMap.put("appid", response.get("appid"));                 returnMap.put("mch_id", response.get("mch_id"));                 returnMap.put("nonce_str", response.get("nonce_str"));                 returnMap.put("sign", response.get("sign"));                 if ("SUCCESS".equals(resultCode)) {//resultCode 为SUCCESS，才会返回prepay_id和trade_type                     //获取预支付交易回话标志                     returnMap.put("trade_type", response.get("trade_type"));                     returnMap.put("prepay_id", response.get("prepay_id"));                     return returnMap;                 } else {                     logger.info("预订单的返回结果ERROR，{}", JSONObject.toJSON(response));                     //此时返回没有预付订单的数据                     return returnMap;                 }             } else {                 return returnMap;             }         } catch (Exception e) {             System.out.println(e);             //系统等其他错误的时候         }         return returnMap;     }         /**      * @param notifyData 异步通知后的XML数据      * @return      */     public String payBack(String notifyData) {         logger.info("异步通知进入方法数据：{}",notifyData);         WXConfigUtil config = null;         try {             config = WXConfigUtil.initWXconfigUtil();         } catch (Exception e) {             e.printStackTrace();         }         WXPay wxpay = new WXPay(config);         String xmlBack = "";         Map notifyMap = null;         try {             notifyMap = WXPayUtil.xmlToMap(notifyData);         // 调用官方SDK转换成map类型数据             logger.info("支付异步结果通知：{}",JSONObject.toJSONString(notifyMap));             if (wxpay.isPayResultNotifySignatureValid(notifyMap)) {//验证签名是否有效，有效则进一步处理                   String return_code = notifyMap.get("return_code");//状态                 String out_trade_no = notifyMap.get("out_trade_no");//商户订单号                 if (return_code.equals("SUCCESS")) {                     if (out_trade_no != null) {                         // 注意特殊情况：订单已经退款，但收到了支付结果成功的通知，不应把商户的订单状态从退款改成支付成功                         // 注意特殊情况：微信服务端同样的通知可能会多次发送给商户系统，所以数据持久化之前需要检查是否已经处理过了，处理了直接返回成功标志                         //业务数据持久化                           System.err.println("支付成功");                           logger.info("微信手机支付回调成功订单号:{}", out_trade_no);                         xmlBack = "" + "" + "" + " ";                     } else {                         logger.info("微信手机支付回调失败订单号:{}", out_trade_no);                         xmlBack = "" + "" + "" + " ";                     }                 }                 return xmlBack;             } else {                 // 签名错误，如果数据里没有sign字段，也认为是签名错误                 //失败的数据要不要存储？                 logger.error("手机支付回调通知签名错误");                 xmlBack = "" + "" + "" + " ";                 return xmlBack;             }         } catch (Exception e) {             logger.error("手机支付回调通知失败", e);             xmlBack = "" + "" + "" + " ";         }         return xmlBack;     }       static Properties getProperties() {         if(null == properties) {             properties = PropertiesUtil.getProperties("/wxConfig/WxpayConfig.properties");         }         return properties;     }