1.添加依賴

<dependency><groupId>com.github.wxpay</groupId><artifactId>WXPay-SDK-Java</artifactId><version>0.0.4</version> </dependency>

2.配置參數

3.實現方法?

@ApiOperation(value = "企業轉賬到零錢", httpMethod = "POST", produces = "application/json;charset=UTF-8")@ApiImplicitParams(value = {@ApiImplicitParam(value = "*用戶token", name = "token",defaultValue ="", dataType = "String",paramType="header"),@ApiImplicitParam(value = "金額", name = "money",defaultValue ="", dataType = "String",paramType="query")})@PostMapping("/wxpay/transfer")public Result transfer(HttpServletRequest request,BigDecimal money,String openID) {// 1.0 拼湊企業支付需要的參數String appid = APPID; // APP對應的微信的appidString mch_id = MCHID; // 商戶號String nonce_str = WXPayUtil.generateNonceStr(); // 生成隨機數String partner_trade_no = WXPayUtil.generateNonceStr(); // 生成商戶訂單號String openid = openID; // 收款用戶openidString check_name = "NO_CHECK"; // 是否驗證真實姓名呢String re_user_name = "KOLO"; // 收款用戶姓名(非必須)String amount = String.valueOf(money); // 企業付款金額，最少為100，單位為分String desc = "恭喜你，完成了一個訂單！"; // 企業付款操作說明信息。必填。String spbill_create_ip = IpKit.getIpAddr(request); // 用戶的ip地址// 2.0 生成map集合SortedMap<String, String> packageParams = new TreeMap<String, String>();packageParams.put("mch_appid", appid); // 微信公眾號的appidpackageParams.put("mchid", mch_id); // 商務號packageParams.put("nonce_str", nonce_str); // 隨機生成后數字，保證安全性packageParams.put("partner_trade_no", partner_trade_no); // 生成商戶訂單號packageParams.put("openid", openid); // 支付給用戶openidpackageParams.put("check_name", check_name); // 是否驗證真實姓名呢packageParams.put("re_user_name", re_user_name);// 收款用戶姓名packageParams.put("amount", amount); // 企業付款金額，單位為分packageParams.put("desc", desc); // 企業付款操作說明信息。必填。packageParams.put("spbill_create_ip", spbill_create_ip); // 調用接口的機器Ip地址try {// 3.0 利用上面的參數，先去生成自己的簽名String sign = WXPayUtil.generateSignature(packageParams, PATERNERKEY);// 4.0 將簽名再放回map中，它也是一個參數packageParams.put("sign", sign);// 5.0將當前的map結合轉化成xml格式String xml = WXPayUtil.mapToXml(packageParams);// 6.0獲取需要發送的url地址String wxUrl = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers"; // 獲取退款的api接口System.out.println("發送前的xml為：" + xml);// 7,向微信發送請求轉賬請求String returnXml = certHttpUtil.postData(wxUrl, xml, MCHID, CERTPATH);System.out.println("返回的returnXml為:" + returnXml);// 8，將微信返回的xml結果轉成map格式Map<String, String> returnMap = WXPayUtil.xmlToMap(returnXml);if (returnMap.get("result_code").equals("SUCCESS")) {// 付款成功System.out.println("returnMap為:" + returnMap);}else {return Result.error(902,returnMap.get("err_code_des"));}return Result.ok(returnMap.toString());} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();return Result.error(901,"微信轉賬失敗！");}}

4.用到的工具類

import java.io.File;import java.io.FileInputStream;import java.io.IOException; import java.io.InputStream; import java.security.KeyStore;import javax.net.ssl.SSLContext;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.methods.HttpPost;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 org.springframework.stereotype.Component;/*** 獲取微信apiclient_cert.p12證書*/@Componentpublic class CertHttpUtil {private static int socketTimeout = 10000;// 連接超時時間，默認10秒private static int connectTimeout = 30000;// 傳輸超時時間，默認30秒private static RequestConfig requestConfig;// 請求器的配置private static CloseableHttpClient httpClient;// HTTP請求器/*** 通過Https往API post xml數據** @param url API地址* @param xmlObj 要提交的XML數據對象* @param mchId 商戶ID* @param certPath 證書位置* @return*/public String postData(String url, String xmlObj, String mchId, String certPath) {// 加載證書try {initCert(mchId, certPath);} catch (Exception e) {e.printStackTrace();}String result = null;HttpPost httpPost = new HttpPost(url);// 得指明使用UTF-8編碼，否則到API服務器XML的中文不能被成功識別StringEntity postEntity = new StringEntity(xmlObj, "UTF-8");httpPost.addHeader("Content-Type", "text/xml");httpPost.setEntity(postEntity);// 根據默認超時限制初始化requestConfigrequestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();// 設置請求器的配置httpPost.setConfig(requestConfig);try {HttpResponse response = null;try {response = httpClient.execute(httpPost);} catch (IOException e) {e.printStackTrace();}HttpEntity entity = response.getEntity();try {result = EntityUtils.toString(entity, "UTF-8");} catch (IOException e) {e.printStackTrace();}} finally {httpPost.abort();}return result;}/*** 加載證書** @param mchId 商戶ID* @param certPath 證書位置* @throws Exception*/private void initCert(String mchId, String certPath) throws Exception {// 證書密碼，默認為商戶IDString key = mchId;// 證書的路徑String path = certPath;// 指定讀取證書格式為PKCS12KeyStore keyStore = KeyStore.getInstance("PKCS12");// 讀取本機存放的PKCS12證書文件File file = new File(path);InputStream in = new FileInputStream(file);try {// 指定PKCS12的密碼(商戶ID)keyStore.load(in, key.toCharArray());} finally {in.close();}SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, key.toCharArray()).build();SSLConnectionSocketFactory sslsf =new SSLConnectionSocketFactory(sslcontext, new String[] {"TLSv1"}, null,SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();}}

注意，這個功能的實現需要先獲取微信授權，授權后獲取微信用戶的openid才能完成提現，同時該方法適合微信公眾號提現和微信小程序提現。

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