Java实现提现到微信的功能

1.添加依赖

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

2.配置参数

3.实现方法 

@ApiOperation(value = "企业转账到零钱", httpMethod = "POST", produces = "application/json;charset=UTF-8")@ApiImplicitParams(value = {@ApiImplicitParam(value = "*用户token", name = "token",defaultValue ="", dataType = "String",paramType="header"),@ApiImplicitParam(value = "金额", name = "money",defaultValue ="", dataType = "String",paramType="query")})@PostMapping("/wxpay/transfer")public Result transfer(HttpServletRequest request,BigDecimal money,String openID) {// 1.0 拼凑企业支付需要的参数String appid = APPID; // APP对应的微信的appidString mch_id = MCHID; // 商户号String nonce_str = WXPayUtil.generateNonceStr(); // 生成随机数String partner_trade_no = WXPayUtil.generateNonceStr(); // 生成商户订单号String openid = openID; // 收款用户openidString check_name = "NO_CHECK"; // 是否验证真实姓名呢String re_user_name = "KOLO"; // 收款用户姓名(非必须)String amount = String.valueOf(money); // 企业付款金额，最少为100，单位为分String desc = "恭喜你，完成了一个订单！"; // 企业付款操作说明信息。必填。String spbill_create_ip = IpKit.getIpAddr(request); // 用户的ip地址// 2.0 生成map集合SortedMap<String, String> packageParams = new TreeMap<String, String>();packageParams.put("mch_appid", appid); // 微信公众号的appidpackageParams.put("mchid", mch_id); // 商务号packageParams.put("nonce_str", nonce_str); // 随机生成后数字，保证安全性packageParams.put("partner_trade_no", partner_trade_no); // 生成商户订单号packageParams.put("openid", openid); // 支付给用户openidpackageParams.put("check_name", check_name); // 是否验证真实姓名呢packageParams.put("re_user_name", re_user_name);// 收款用户姓名packageParams.put("amount", amount); // 企业付款金额，单位为分packageParams.put("desc", desc); // 企业付款操作说明信息。必填。packageParams.put("spbill_create_ip", spbill_create_ip); // 调用接口的机器Ip地址try {// 3.0 利用上面的参数，先去生成自己的签名String sign = WXPayUtil.generateSignature(packageParams, PATERNERKEY);// 4.0 将签名再放回map中，它也是一个参数packageParams.put("sign", sign);// 5.0将当前的map结合转化成xml格式String xml = WXPayUtil.mapToXml(packageParams);// 6.0获取需要发送的url地址String wxUrl = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers"; // 获取退款的api接口System.out.println("发送前的xml为：" + xml);// 7,向微信发送请求转账请求String returnXml = certHttpUtil.postData(wxUrl, xml, MCHID, CERTPATH);System.out.println("返回的returnXml为:" + returnXml);// 8，将微信返回的xml结果转成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为:" + 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,"微信转账失败！");}}

4.用到的工具类

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;/*** 获取微信apiclient_cert.p12证书*/@Componentpublic class CertHttpUtil {private static int socketTimeout = 10000;// 连接超时时间，默认10秒private static int connectTimeout = 30000;// 传输超时时间，默认30秒private static RequestConfig requestConfig;// 请求器的配置private static CloseableHttpClient httpClient;// HTTP请求器/*** 通过Https往API post xml数据** @param url API地址* @param xmlObj 要提交的XML数据对象* @param mchId 商户ID* @param certPath 证书位置* @return*/public String postData(String url, String xmlObj, String mchId, String certPath) {// 加载证书try {initCert(mchId, certPath);} catch (Exception e) {e.printStackTrace();}String result = null;HttpPost httpPost = new HttpPost(url);// 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(xmlObj, "UTF-8");httpPost.addHeader("Content-Type", "text/xml");httpPost.setEntity(postEntity);// 根据默认超时限制初始化requestConfigrequestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();// 设置请求器的配置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;}/*** 加载证书** @param mchId 商户ID* @param certPath 证书位置* @throws Exception*/private void initCert(String mchId, String certPath) throws Exception {// 证书密码，默认为商户IDString key = mchId;// 证书的路径String path = certPath;// 指定读取证书格式为PKCS12KeyStore keyStore = KeyStore.getInstance("PKCS12");// 读取本机存放的PKCS12证书文件File file = new File(path);InputStream in = new FileInputStream(file);try {// 指定PKCS12的密码(商户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，这个功能的实现需要先获取微信授权，授权后获取微信用户的openid才能完成提现，同时该方法适合微信公众号提现和微信小程序提现。

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