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服務(wù)器之家 - 編程語(yǔ)言 - JAVA教程 - Java通過(guò)JsApi方式實(shí)現(xiàn)微信支付

Java通過(guò)JsApi方式實(shí)現(xiàn)微信支付

2019-12-30 13:44縱酒揮刀斬人頭 JAVA教程

本文講解了Java如何實(shí)現(xiàn)JsApi方式的微信支付，代碼內(nèi)容詳細(xì)，文章思路清晰,需要的朋友可以參考下

要使用JsApi進(jìn)行微信支付，首先要從微信獲得一個(gè)prepay_id，然后通過(guò)調(diào)用微信的jsapi完成支付，JS API的返回結(jié)果get_brand_wcpay_request:ok僅在用戶成功完成支付時(shí)返回。由于前端交互復(fù)雜，get_brand_wcpay_request:cancel或者get_brand_wcpay_request:fail可以統(tǒng)一處理為用戶遇到錯(cuò)誤或者主動(dòng)放棄，不必細(xì)化區(qū)分。
示例代碼如下：

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function onBridgeReady(){
 WeixinJSBridge.invoke(
 'getBrandWCPayRequest', {
 "appId" : "wx2421b1c4370ec43b", //公眾號(hào)名稱(chēng)，由商戶傳入
 "timeStamp":" 1395712654", //時(shí)間戳，自1970年以來(lái)的秒數(shù)
 "nonceStr" : "e61463f8efa94090b1f366cccfbbb444", //隨機(jī)串
 "package" : "u802345jgfjsdfgsdg888",
 "signType" : "MD5", //微信簽名方式:
 "paySign" : "70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信簽名
 },
 function(res){
 if(res.err_msg == "get_brand_wcpay_request:ok" ) {} // 使用以上方式判斷前端返回,微信團(tuán)隊(duì)鄭重提示：res.err_msg將在用戶支付成功后返回 ok，但并不保證它絕對(duì)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();
}

以上傳入的參數(shù)package，即為prepay_id

下面講的是獲得參數(shù)來(lái)調(diào)用jsapi
我們調(diào)用JSAPI時(shí)，必須獲得用戶的openid，（trade_type=JSAPI，openid為必填參數(shù)。）
首先定義一個(gè)請(qǐng)求的對(duì)象：

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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("傳入?yún)?shù)appid不能為null");
 }
 if (mch_id == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)mch_id不能為null");
 }
 if (body == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)body不能為null");
 }
 if (out_trade_no == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)out_trade_no不能為null");
 }
 if (total_fee == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)total_fee不能為null");
 }
 if (spbill_create_ip == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)spbill_create_ip不能為null");
 }
 if (notify_url == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)notify_url不能為null");
 }
 if (trade_type == null) {
 throw new IllegalArgumentException("傳入?yún)?shù)trade_type不能為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("當(dāng)傳入trade_type為JSAPI時(shí)，openid為必填參數(shù)");
 }
 if("NATIVE".equals(this.trade_type) && this.product_id == null) {
 throw new IllegalArgumentException("當(dāng)傳入trade_type為NATIVE時(shí)，product_id為必填參數(shù)");
 }
 return new UnifiedOrderReqData(this);
 }
 }
 
 
 
}

因?yàn)橛行﹨?shù)為必填，有些參數(shù)為選填。而且sign要等所有參數(shù)傳入之后才能計(jì)算的出，所以這里用了builder模式。關(guān)于builder模式。

我們選用httpclient進(jìn)行網(wǎng)絡(luò)傳輸。

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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();
 
 //連接超時(shí)時(shí)間，默認(rèn)10秒
 private static int socketTimeout = 5000;
 
 //傳輸超時(shí)時(shí)間，默認(rèn)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()));//加載本地的證書(shū)進(jìn)行https加密傳輸
 try {
 keyStore.load(instream, Configure.getCertPassword().toCharArray());//設(shè)置證書(shū)密碼
 } 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);
 
 //解決XStream對(duì)出現(xiàn)雙下劃線的bug
 XStream xStreamForRequestPostData = new XStream(new DomDriver("UTF-8", new XmlFriendlyNameCoder("-_", "_")));
 
 //將要提交給API的數(shù)據(jù)對(duì)象轉(zhuǎn)換成XML格式數(shù)據(jù)Post給API
 String postDataXML = xStreamForRequestPostData.toXML(object2Xml);
 
 logger.info("API，POST過(guò)去的數(shù)據(jù)是：");
 logger.info(postDataXML);
 
 //得指明使用UTF-8編碼，否則到API服務(wù)器XML的中文不能被成功識(shí)別
 StringEntity postEntity = new StringEntity(postDataXML, "UTF-8");
 httpPost.addHeader("Content-Type", "text/xml");
 httpPost.setEntity(postEntity);
 
 //設(shè)置請(qǐng)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;
 }
}

然后是我們的總?cè)肟冢?/p>

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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));
 
 
 }
}

返回的xml為：

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<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>

return_code 和result_code都為SUCCESS的時(shí)候會(huì)返回我們需要的prepay_id。。。，然后在jsapi中使用他就可以了。。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助。

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