Explication détaillée de la mise en œuvre par Java du mode de paiement WeChat via JsApi

Cet article explique comment Java implémente le paiement WeChat en mode JsApi. Le contenu du code est détaillé et l'article a des idées claires. Les amis dans le besoin peuvent s'y référer

Pour utiliser JsApi pour le paiement WeChat, vous devez d'abord. obtenez un prepay_id de WeChat. Ensuite, le paiement est effectué en appelant le jsapi de WeChat. Le résultat de retour de l'API JS get_brand_wcpay_request:ok n'est renvoyé que lorsque l'utilisateur termine le paiement avec succès. En raison de la complexité de l'interaction frontale, get_brand_wcpay_request:cancel ou get_brand_wcpay_request:fail peuvent être traités uniformément lorsque l'utilisateur rencontre une erreur ou abandonne volontairement, sans distinction détaillée.
L'exemple de code est le suivant :

function onBridgeReady(){
 WeixinJSBridge.invoke(
 'getBrandWCPayRequest', {
  "appId" : "wx2421b1c4370ec43b", //公众号名称，由商户传入
  "timeStamp":" 1395712654",  //时间戳，自1970年以来的秒数
  "nonceStr" : "e61463f8efa94090b1f366cccfbbb444", //随机串
  "package" : "u802345jgfjsdfgsdg888",
  "signType" : "MD5",  //微信签名方式:
  "paySign" : "70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名
 },
 function(res){
  if(res.err_msg == "get_brand_wcpay_request:ok" ) {} // 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回 ok，但并不保证它绝对可靠。
 }
 );
}
if (typeof WeixinJSBridge == "undefined"){
 if( document.addEventListener ){
 document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
 }else if (document.attachEvent){
 document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
 document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
 }
}else{
 onBridgeReady();
}

Le package de paramètres importé ci-dessus est prepay_id

Ce qui suit concerne l'obtention des paramètres pour appeler jsapi
Lorsque nous appelons JSAPI, nous devons obtenir l'openid de l'utilisateur, (trade_type=JSAPI, openid est un paramètre obligatoire.)
Définissez d'abord un objet demandé  :

package com.unstoppedable.protocol;
import com.unstoppedable.common.Configure;
import com.unstoppedable.common.HttpService;
import com.unstoppedable.common.RandomStringGenerator;
import com.unstoppedable.common.Signature;
import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
public class UnifiedOrderReqData {
 private String appid;
 private String mch_id;
 private String device_info;
 private String nonce_str;
 private String sign;
 private String body;
 private String detail;
 private String attach;
 private String out_trade_no;
 private String fee_type;
 private int total_fee;
 private String spbill_create_ip;
 private String time_start;
 private String time_expire;
 private String goods_tag;
 private String notify_url;
 private String trade_type;
 private String product_id;
 private String limit_pay;
 private String openid;
 private UnifiedOrderReqData(UnifiedOrderReqDataBuilder builder) {
 this.appid = builder.appid;
 this.mch_id = builder.mch_id;
 this.device_info = builder.device_info;
 this.nonce_str = RandomStringGenerator.getRandomStringByLength(32);
 this.body = builder.body;
 this.detail = builder.detail;
 this.attach = builder.attach;
 this.out_trade_no = builder.out_trade_no;
 this.fee_type = builder.fee_type;
 this.total_fee = builder.total_fee;
 this.spbill_create_ip = builder.spbill_create_ip;
 this.time_start = builder.time_start;
 this.time_expire = builder.time_expire;
 this.goods_tag = builder.goods_tag;
 this.notify_url = builder.notify_url;
 this.trade_type = builder.trade_type;
 this.product_id = builder.product_id;
 this.limit_pay = builder.limit_pay;
 this.openid = builder.openid;
 this.sign = Signature.getSign(toMap());
 }
 public void setAppid(String appid) {
 this.appid = appid;
 }
 public void setMch_id(String mch_id) {
 this.mch_id = mch_id;
 }
 public void setDevice_info(String device_info) {
 this.device_info = device_info;
 }
 public void setNonce_str(String nonce_str) {
 this.nonce_str = nonce_str;
 }
 public void setSign(String sign) {
 this.sign = sign;
 }
 public void setBody(String body) {
 this.body = body;
 }
 public void setDetail(String detail) {
 this.detail = detail;
 }
 public void setAttach(String attach) {
 this.attach = attach;
 }
 public void setOut_trade_no(String out_trade_no) {
 this.out_trade_no = out_trade_no;
 }
 public void setFee_type(String fee_type) {
 this.fee_type = fee_type;
 }
 public void setTotal_fee(int total_fee) {
 this.total_fee = total_fee;
 }
 public void setSpbill_create_ip(String spbill_create_ip) {
 this.spbill_create_ip = spbill_create_ip;
 }
 public void setTime_start(String time_start) {
 this.time_start = time_start;
 }
 public void setTime_expire(String time_expire) {
 this.time_expire = time_expire;
 }
 public void setGoods_tag(String goods_tag) {
 this.goods_tag = goods_tag;
 }
 public void setNotify_url(String notify_url) {
 this.notify_url = notify_url;
 }
 public void setTrade_type(String trade_type) {
 this.trade_type = trade_type;
 }
 public void setProduct_id(String product_id) {
 this.product_id = product_id;
 }
 public void setLimit_pay(String limit_pay) {
 this.limit_pay = limit_pay;
 }
 public void setOpenid(String openid) {
 this.openid = openid;
 }
 public Map<String, Object> toMap() {
 Map<String, Object> map = new HashMap<String, Object>();
 Field[] fields = this.getClass().getDeclaredFields();
 for (Field field : fields) {
  Object obj;
  try {
  obj = field.get(this);
  if (obj != null) {
   map.put(field.getName(), obj);
  }
  } catch (IllegalArgumentException e) {
  e.printStackTrace();
  } catch (IllegalAccessException e) {
  e.printStackTrace();
  }
 }
 return map;
 }
 public static class UnifiedOrderReqDataBuilder {
 private String appid;
 private String mch_id;
 private String device_info;
 private String body;
 private String detail;
 private String attach;
 private String out_trade_no;
 private String fee_type;
 private int total_fee;
 private String spbill_create_ip;
 private String time_start;
 private String time_expire;
 private String goods_tag;
 private String notify_url;
 private String trade_type;
 private String product_id;
 private String limit_pay;
 private String openid;
 public UnifiedOrderReqDataBuilder(String appid, String mch_id, String body, String out_trade_no, Integer total_fee,
      String spbill_create_ip, String notify_url, String trade_type) {
  if (appid == null) {
  throw new IllegalArgumentException("传入参数appid不能为null");
  }
  if (mch_id == null) {
  throw new IllegalArgumentException("传入参数mch_id不能为null");
  }
  if (body == null) {
  throw new IllegalArgumentException("传入参数body不能为null");
  }
  if (out_trade_no == null) {
  throw new IllegalArgumentException("传入参数out_trade_no不能为null");
  }
  if (total_fee == null) {
  throw new IllegalArgumentException("传入参数total_fee不能为null");
  }
  if (spbill_create_ip == null) {
  throw new IllegalArgumentException("传入参数spbill_create_ip不能为null");
  }
  if (notify_url == null) {
  throw new IllegalArgumentException("传入参数notify_url不能为null");
  }
  if (trade_type == null) {
  throw new IllegalArgumentException("传入参数trade_type不能为null");
  }
  this.appid = appid;
  this.mch_id = mch_id;
  this.body = body;
  this.out_trade_no = out_trade_no;
  this.total_fee = total_fee;
  this.spbill_create_ip = spbill_create_ip;
  this.notify_url = notify_url;
  this.trade_type = trade_type;
 }
 public UnifiedOrderReqDataBuilder setDevice_info(String device_info) {
  this.device_info = device_info;
  return this;
 }
 public UnifiedOrderReqDataBuilder setDetail(String detail) {
  this.detail = detail;
  return this;
 }
 public UnifiedOrderReqDataBuilder setAttach(String attach) {
  this.attach = attach;
  return this;
 }
 public UnifiedOrderReqDataBuilder setFee_type(String fee_type) {
  this.fee_type = fee_type;
  return this;
 }
 public UnifiedOrderReqDataBuilder setTime_start(String time_start) {
  this.time_start = time_start;
  return this;
 }
 public UnifiedOrderReqDataBuilder setTime_expire(String time_expire) {
  this.time_expire = time_expire;
  return this;
 }
 public UnifiedOrderReqDataBuilder setGoods_tag(String goods_tag) {
  this.goods_tag = goods_tag;
  return this;
 }
 public UnifiedOrderReqDataBuilder setProduct_id(String product_id) {
  this.product_id = product_id;
  return this;
 }
 public UnifiedOrderReqDataBuilder setLimit_pay(String limit_pay) {
  this.limit_pay = limit_pay;
  return this;
 }
 public UnifiedOrderReqDataBuilder setOpenid(String openid) {
  this.openid = openid;
  return this;
 }
 public UnifiedOrderReqData build() {
  if("JSAPI".equals(this.trade_type) && this.openid == null) {
  throw new IllegalArgumentException("当传入trade_type为JSAPI时，openid为必填参数");
  }
  if("NATIVE".equals(this.trade_type) && this.product_id == null) {
  throw new IllegalArgumentException("当传入trade_type为NATIVE时，product_id为必填参数");
  }
  return new UnifiedOrderReqData(this);
 }
 }
}

Car certains paramètres sont requis, et certains paramètres sont facultatifs. De plus, le signe ne peut pas être calculé tant que tous les paramètres n'ont pas été transmis, le mode constructeur est donc utilisé ici. À propos du mode constructeur.

Nous choisissons httpclient pour la transmission réseau.

package com.unstoppedable.common;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
import com.thoughtworks.xstream.io.xml.XmlFriendlyNameCoder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ConnectTimeoutException;
import org.apache.http.conn.ConnectionPoolTimeoutException;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import javax.net.ssl.SSLContext;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.security.KeyStore;
/**
 * Created by hupeng on 2015/7/28.
 */
public class HttpService {
 private static Log logger = LogFactory.getLog(HttpService.class);
 private static CloseableHttpClient httpClient = buildHttpClient();
 //连接超时时间，默认10秒
 private static int socketTimeout = 5000;
 //传输超时时间，默认30秒
 private static int connectTimeout = 5000;
 private static int requestTimeout = 5000;
 public static CloseableHttpClient buildHttpClient() {
 try {
  KeyStore keyStore = KeyStore.getInstance("PKCS12");
  FileInputStream instream = new FileInputStream(new File(Configure.getCertLocalPath()));//加载本地的证书进行https加密传输
  try {
  keyStore.load(instream, Configure.getCertPassword().toCharArray());//设置证书密码
  } finally {
  instream.close();
  }
  // Trust own CA and all self-signed certs
  SSLContext sslcontext = SSLContexts.custom()
   .loadKeyMaterial(keyStore, Configure.getCertPassword().toCharArray())
   .build();
  // Allow TLSv1 protocol only
  SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
   sslcontext,
   new String[]{"TLSv1"},
   null,
   SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
  RequestConfig requestConfig = RequestConfig.custom()
   .setConnectTimeout(connectTimeout)
   .setConnectionRequestTimeout(requestTimeout)
   .setSocketTimeout(socketTimeout).build();
  httpClient = HttpClients.custom()
   .setDefaultRequestConfig(requestConfig)
   .setSSLSocketFactory(sslsf)
   .build();
  return httpClient;
 } catch (Exception e) {
  throw new RuntimeException("error create httpclient......", e);
 }
 }
 public static String doGet(String requestUrl) throws Exception {
 HttpGet httpget = new HttpGet(requestUrl);
 try {
  logger.debug("Executing request " + httpget.getRequestLine());
  // Create a custom response handler
  ResponseHandler<String> responseHandler = new ResponseHandler<String>() {
  @Override
  public String handleResponse(
   final HttpResponse response) throws ClientProtocolException, IOException {
   int status = response.getStatusLine().getStatusCode();
   if (status >= 200 && status < 300) {
   HttpEntity entity = response.getEntity();
   return entity != null ? EntityUtils.toString(entity) : null;
   } else {
   throw new ClientProtocolException("Unexpected response status: " + status);
   }
  }
  };
  return httpClient.execute(httpget, responseHandler);
 } finally {
  httpget.releaseConnection();
 }
 }
 public static String doPost(String url, Object object2Xml) {
 String result = null;
 HttpPost httpPost = new HttpPost(url);
 //解决XStream对出现双下划线的bug
 XStream xStreamForRequestPostData = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));
 //将要提交给API的数据对象转换成XML格式数据Post给API
 String postDataXML = xStreamForRequestPostData.toXML(object2Xml);
 logger.info("API，POST过去的数据是：");
 logger.info(postDataXML);
 //得指明使用UTF-8编码，否则到API服务器XML的中文不能被成功识别
 StringEntity postEntity = new StringEntity(postDataXML, "UTF-8");
 httpPost.addHeader("Content-Type", "text/xml");
 httpPost.setEntity(postEntity);
 //设置请求器的配置
 logger.info("executing request" + httpPost.getRequestLine());
 try {
  HttpResponse response = httpClient.execute(httpPost);
  HttpEntity entity = response.getEntity();
  result = EntityUtils.toString(entity, "UTF-8");
 } catch (ConnectionPoolTimeoutException e) {
  logger.error("http get throw ConnectionPoolTimeoutException(wait time out)", e);
 } catch (ConnectTimeoutException e) {
  logger.error("http get throw ConnectTimeoutException", e);
 } catch (SocketTimeoutException e) {
  logger.error("http get throw SocketTimeoutException", e);
 } catch (Exception e) {
  logger.error("http get throw Exception", e);
 } finally {
  httpPost.abort();
 }
 return result;
 }
}

Ensuite, il y a notre entrée générale :

package com.unstoppedable.service;
import com.unstoppedable.common.Configure;
import com.unstoppedable.common.HttpService;
import com.unstoppedable.common.XMLParser;
import com.unstoppedable.protocol.UnifiedOrderReqData;
import org.xml.sax.SAXException;
import javax.xml.parsers.ParserConfigurationException;
import java.io.IOException;
import java.util.Map;
/**
 * Created by hupeng on 2015/7/28.
 */
public class WxPayApi {
 public static Map<String,Object> UnifiedOrder(UnifiedOrderReqData reqData) throws IOException, SAXException, ParserConfigurationException {
 String res = HttpService.doPost(Configure.UNIFIED_ORDER_API, reqData);
 return XMLParser.getMapFromXML(res);
 }
 public static void main(String[] args) throws Exception {
 UnifiedOrderReqData reqData = new UnifiedOrderReqData.UnifiedOrderReqDataBuilder("appid", "mch_id", "body", "out_trade_no", 1, "spbill_create_ip", "notify_url", "JSAPI").setOpenid("openid").build();
 System.out.println(UnifiedOrder(reqData));
 }
}

Le XML renvoyé est :

<xml>
 <return_code><![CDATA[SUCCESS]]></return_code>
 <return_msg><![CDATA[OK]]></return_msg>
 <appid><![CDATA[wx2421b1c4370ec43b]]></appid>
 <mch_id><![CDATA[10000100]]></mch_id>
 <nonce_str><![CDATA[IITRi8Iabbblz1Jc]]></nonce_str>
 <sign><![CDATA[7921E432F65EB8ED0CE9755F0E86D72F]]></sign>
 <result_code><![CDATA[SUCCESS]]></result_code>
 <prepay_id><![CDATA[wx201411101639507cbf6ffd8b0779950874]]></prepay_id>
 <trade_type><![CDATA[JSAPI]]></trade_type>
</xml>

Quand return_code et result_code sont tous deux SUCCÈS, nous serons renvoyé Prepay_id requis. . . , puis utilisez-le simplement dans jsapi. .

Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!