微信退款

导入相关的jar包

  
    taglibs
    standard
    1.1.2
  
   
  
    me.chanjar
    weixin-java-mp
    1.3.3
  

创建退款实体

public class WxReturnFeeEntity implements Serializable {
 private String return_code;
 private String return_msg;
 private String appid;
 private String mch_id;
 private String nonce_str;
 private String sign;
 private String result_code;
 private String out_refund_no;
 private String err_code;
}

退款的详细代码

      /**
  * 微信退款
  * 

  * 微信退款详情信息
  *
  * @param order 订单
  * @return WxReturnFeeEntity 退款实体
  */
 public WxReturnFeeEntity refundFee(OrderEntity order) {
  String nonce_str = System.currentTimeMillis() + "";
  /** 当前时间 yyyyMMddHHmmss */
  String currTime = getCurrTime();
  /** 8位日期 */
  String strTime = currTime.substring(8, currTime.length());
  /** 四位随机数 */
  String strRandom = buildRandom(4) + "";
  /** 订单号 */
  String out_refund_no = strTime + strRandom;
  SortedMap packageParams = new TreeMap();
  packageParams.put("appid", "wx84254d2616e3c80d");
  packageParams.put("mch_id", "1275811201");
  packageParams.put("nonce_str", nonce_str);
  packageParams.put("out_trade_no", order.getOutTradeNo());
  packageParams.put("out_refund_no", out_refund_no);
  packageParams.put("total_fee", (int) (order.getPayMoney() * hundred) + "");
  packageParams.put("refund_fee", (int) (order.getPayMoney() * hundred) + "");
  packageParams.put("refund_fee_type", "CNY");
  packageParams.put("op_user_id", "1275811201");
  String sign = WxCryptUtil.createSign(packageParams, "kuaileguojiang20151212kingberry1");
  String xml = "" + "wx84254d2616e3c80d" + "1275811201" + ""
    + nonce_str + "" + "" + sign + "" + "" + order.getOutTradeNo()
    + "" + "" + out_refund_no + "" + ""
    + packageParams.get("total_fee") + "" + "" + packageParams.get("refund_fee")
    + "" + "" + packageParams.get("refund_fee_type") + ""
    + "1275811201" + "";
  HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/secapi/pay/refund");
  try {
   KeyStore keyStore = KeyStore.getInstance("PKCS12");
   FileInputStream instream = new FileInputStream(new File(kvConfigs.getValues().get("static")
     + "/apiclient_cert.p12"));
   try {
    keyStore.load(instream, "1275811201".toCharArray());
   } finally {
    instream.close();
   }
   SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, "1275811201".toCharArray()).build();
   SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" },
     null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
   CloseableHttpClient httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
   StringEntity entity = new StringEntity(xml, Consts.UTF_8);
   httpPost.setEntity(entity);
   CloseableHttpResponse response = httpclient.execute(httpPost);
   String responseContent = Utf8ResponseHandler.INSTANCE.handleResponse(response);
   XStream xstream = XStreamInitializer.getInstance();
   xstream.alias("xml", WxReturnFeeEntity.class);
   WxReturnFeeEntity wxReturnFeeEntity = (WxReturnFeeEntity) xstream.fromXML(responseContent);
   return wxReturnFeeEntity;
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }