springboot整合微信支付sdk过程解析

<!-- https://mvnrepository.com/artifact/com.github.wxpay/WXPay-SDK-Java -->
<dependency>
 <groupId>com.github.wxpay</groupId>
 <artifactId>WXPay-SDK-Java</artifactId>
 <version>0.0.4</version>
</dependency>

package com.github.wxpay.sdk;
import java.io.InputStream;
/**
 * @author Ean
 * @date 2019/7/2
 */
public class MyConfig extends WXPayConfig {
 /**
  * 获取 App ID
  *
  * @return App ID
  */
 @Override
 String getAppID() {
  return "wxdb70c7c6b******";
 }
 /**
  * 获取 Mch ID
  *
  * @return Mch ID
  */
 @Override
 String getMchID() {
  return "1522050000";
 }
 /**
  * 获取 API 密钥
  *
  * @return API密钥
  */
 @Override
 String getKey() {
  return "xxxxxxxxxxxxxxxx";
 }
 /**
  * 获取商户证书内容
  * 这里是读取resources根目录下面的证书文件
  * @return 商户证书内容
  */
 @Override
 InputStream getCertStream() {
  InputStream certStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("apiclient_cert.p12");
  return certStream;
 }
 /**
  * 获取WXPayDomain, 用于多域名容灾自动切换
  * 实现这个接口
  * @return
  */
 @Override
 public IWXPayDomain getWXPayDomain() {
  IWXPayDomain iwxPayDomain = new IWXPayDomain() {
   public void report(String domain, long elapsedTimeMillis, Exception ex) {
   }
   public DomainInfo getDomain(WXPayConfig config) {
    return new IWXPayDomain.DomainInfo(WXPayConstants.DOMAIN_API, true);
   }
  };
  return iwxPayDomain;
 }
}

 /**
  *@描述 提现接口
  *@参数 [param]
  *@创建人 Eangaie
  *@创建时间 2019/7/2
  */
 @PostMapping("despot")
 public Result despot(@RequestBody Map<String,Object> param) throws Exception {
  MyConfig config = new MyConfig();
  WXPay wxpay = new WXPay(config,1);
  SortedMap<String, String> sendData;
  sendData=getDespData(param);
  sendData.put("sign", WXPayUtil.generateSignature(sendData,key , WXPayConstants.SignType.MD5));
  Map<String,String> resData=wxpay.despot(sendData,config.getHttpConnectTimeoutMs(),config.getHttpReadTimeoutMs());
  return ResultUtil.success(resData);
 } 
 private SortedMap<String, String> getDespData(Map<String, Object> param) {
  SortedMap<String, String> params = new TreeMap<String, String>();
  String nonce_str=commonUtil.gen32RandomString();
  String partner_trade_no=commonUtil.createNo();
  String openid= String.valueOf(param.get("openid"));
  String check_name="NO_CHECK";
  String amount= String.valueOf(param.get("amount"));
  String desc="用户提现";
  String spbill_create_ip= String.valueOf(param.get("spbill_create_ip"));
  params.put("mch_appid",mch_appid);
  params.put("mchid",mchid);
  params.put("nonce_str",nonce_str);
  params.put("partner_trade_no",partner_trade_no);
  params.put("openid",openid);
  params.put("check_name",check_name);
  params.put("amount", amount);
  params.put("desc", desc);
  params.put("spbill_create_ip", spbill_create_ip);
  return params;
 }

 else if (return_code.equals(WXPayConstants.SUCCESS)) {
   return respData;
//   if (this.isResponseSignatureValid(respData)) {
//    return respData;
//   }
//   else {
//    throw new Exception(String.format("Invalid sign value in XML: %s", xmlStr));
//   }
  }