需要些的文章有点多，时间太少，我就先随便写写，后面有空闲在优化。
开始 小程序js 页面我就不放了 就一个按钮自己写测试
//申请退款
sqtk: function (e) {
var that = this;
var that = this;
var outRefundNo = "1165166525";
var openId = "o7Rrj5M-METpuTV8mNxv6_6gn1sw";
var tradeNo = "85511613375";
var amount = "0.01";
console.log('申请退款' + e.currentTarget.dataset.wmddid)
wx.showModal({
title: '提示',
content: '申请退款么',
success: function (res) {
if (res.confirm) {
wx.request({
url: 'http://**/app/refund',
method: 'POST',
data: {
openId: openId,
tradeNo: tradeNo,
amount: amount,
outRefundNo: outRefundNo,
refundAmount: amount
}, //参数为键值对字符串
header: {
//设置参数内容类型为x-www-form-urlencoded
"Accept": "*/*", 'Content-Type': 'application/json'
},
success: function (e) {
var data = e.data.wxPayResponse;
}
})
} else if (res.cancel) {
console.log('用户点击取消')
}
}
})
}
服务端接口
AppWxPayController.java
退款申请+回调
@PostMapping("refund")
@ApiOperation("微信退款申请")
public R refund(@RequestBody PayParam payParam){
WxPayEntity wxPayEntity=wxPayService.refund(payParam);
return R.ok().put("wxPayResponse", wxPayEntity);
}
@PostMapping("refundNotifyUrl")
@ApiOperation("微信退款回调")
public String refundNotifyUrl(HttpServletRequest request){
String xmlString = WxPayUtils.getXmlString(request);
logger.info("----微信退款回调接收到的数据如下：---" + xmlString);
return wxPayService.refundAsyncNotify(xmlString);
}
service+实现类 WxPayService.java
/** 微信申请退款
* <p>Title: refund</p>
* <p>Description: </p>
* @return
*/
WxPayEntity refund(PayParam payParam);
/**
* 微信退款异步通知
* @param notifyData 异步通知内容
* @return
*/
String refundAsyncNotify(String notifyData);
WxPayServiceImpl.java
/* (non-Javadoc)
* <p>Title: refund</p>
* <p>Description: 退款申请</p>
* @param payParam
* @return
* @see com.alpha.modules.wxpay.service.WxPayService#refund(com.alpha.modules.wxpay.form.PayParam)
*/
@Override
public WxPayEntity refund(PayParam payParam) {
WxRefundResponse response = null;
try {
//组请求参数
WxRefundRequest request = new WxRefundRequest();
request.setAppid(WxConfigure.getAppID());
request.setMchId(WxConfigure.getMch_id());
request.setNonceStr(WxPayUtils.getRandomStr(32));
request.setSignType("MD5");
request.setOutTradeNo(payParam.getTradeNo());
request.setOutRefundNo(payParam.getOutRefundNo());
request.setTotalFee(WxPayUtils.yuanToFen(payParam.getAmount()));
request.setRefundFee(WxPayUtils.yuanToFen(payParam.getRefundAmount()));
request.setNotifyUrl(WxConfigure.getRefundNotifyUrl());
request.setSign(WxPayUtils.signByMD5(request, WxConfigure.getKey()));
Retrofit retrofit=null;
try {
OkHttpClient client=initCert();// 加载证书
retrofit = new Retrofit.Builder()
.baseUrl("https://api.mch.weixin.qq.com")
.addConverterFactory(SimpleXmlConverterFactory.create())
.client(client)
.build();
} catch (Exception e) {
e.printStackTrace();
}
String xml = WxPayUtils.objToXML(request);
RequestBody requestBody = RequestBody.create(MediaType.parse("application/xml; charset=utf-8"), xml);
Call<WxRefundResponse> call = retrofit.create(WxPayApi.class).REFUND_RESPONSE_CALL(requestBody);
Response<WxRefundResponse> retrofitResponse = call.execute();
response = retrofitResponse.body();
if(!response.getReturnCode().equals("SUCCESS")) {
throw new RuntimeException("【微信退款】发起退款, returnCode != SUCCESS, returnMsg = " + response.getReturnMsg());
}
if (!response.getResultCode().equals("SUCCESS")) {
throw new RuntimeException("【微信退款】发起退款, resultCode != SUCCESS, err_code = " + response.getErrCode() + " err_code_des=" + response.getErrCodeDes());
}
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return buildWxRefundResponse(response);
}
/**
* 加载证书
*
*/
private static OkHttpClient initCert() throws Exception {
// 证书密码，默认为商户ID
String key = WxConfigure.getMch_id();
// 证书的路径
String path = WxConfigure.getCertPath();
// 指定读取证书格式为PKCS12
KeyStore keyStore = KeyStore.getInstance("PKCS12");
// 读取本机存放的PKCS12证书文件
FileInputStream instream = new FileInputStream(new File(path));
try {
// 指定PKCS12的密码(商户ID)
keyStore.load(instream, key.toCharArray());
} finally {
instream.close();
}
SSLContext sslcontext = SSLContexts
.custom()
.loadKeyMaterial(keyStore, key.toCharArray())
.build();
// 设置OkHttpClient的SSLSocketFactory
return new OkHttpClient.Builder()
.addInterceptor(chain -> {
// 请求头
Request request = chain.request().newBuilder()
.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8")
.addHeader("Accept-Encoding", "gzip, deflate")
.addHeader("Connection", "keep-alive")
.addHeader("Accept", "*/*")
.build();
return chain.proceed(request);
})
// 超时时间
.readTimeout(5, TimeUnit.MINUTES)
.connectTimeout(5, TimeUnit.MINUTES)
// HTTPS
.sslSocketFactory(sslcontext.getSocketFactory())
// Hostname domain.com not verified
.hostnameVerifier((s, sslSession) -> true)
.build();
}
private WxPayEntity buildWxRefundResponse(WxRefundResponse wxRefundResponse) {
String timeStamps = String.valueOf(System.currentTimeMillis() / 1000L); //微信接口时间戳为10位字符串
WxPayEntity wxPayEntity = new WxPayEntity();
try {
wxPayEntity.setTimeStamp(timeStamps);
wxPayEntity.setNonceStr(WxPayUtils.getRandomStr(32));
wxPayEntity.setAppid(WxConfigure.getAppID());
wxPayEntity.setSignType("MD5");
} catch (Exception e) {
e.printStackTrace();
}
logger.info("【微信退款】退款申请通知:"+wxPayEntity.getOutTradeNo()+"退款申请成功");
return wxPayEntity;
}
/* (non-Javadoc)
* <p>Title: refundAsyncNotify</p>
* <p>Description: 退款回调通知</p>
* @param notifyData
* @return
* @see com.alpha.modules.wxpay.service.WxPayService#refundAsyncNotify(java.lang.String)
*/
@Override
public String refundAsyncNotify(String notifyData) {
WxRefundNotifyResponse wxRefundNotifyResponse = (WxRefundNotifyResponse) WxPayUtils.xmlToObj(notifyData, WxRefundNotifyResponse.class);
try {
if(!wxRefundNotifyResponse.getReturnCode().equals("SUCCESS")) {
throw new RuntimeException("【微信退款】退款成功通知, returnCode != SUCCESS, returnMsg = " + wxRefundNotifyResponse.getReturnMsg());
}
if(StringUtils.isNoneBlank(wxRefundNotifyResponse.getReqInfo())){
String reqInfo=AESUtils.decode(notifyData, WxConfigure.getKey());
WxRefundNotifyReqinfo wxRefundNotifyReqinfo= (WxRefundNotifyReqinfo) WxPayUtils.xmlToObj(reqInfo,WxRefundNotifyReqinfo.class);
if(wxRefundNotifyReqinfo.getRefundStatus().equals("SUCCESS")){
//查询transaction_id 是否为空 为空就修改订单状态
}
logger.info("【微信退款】退款成功通知:"+wxRefundNotifyReqinfo.getOutTradeNo()+"退款成功");
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return WxPayUtils.returnXML(wxRefundNotifyResponse.getReturnCode());
}
这里有个坑，就是解码是256位的，而正常的是128位，需要替换2个jre的jar包
问题还没完，因为某些国家的进口管制限制，Java发布的运行环境包中的加解密有一定的限制。比如默认不允许256位密钥的AES加解密，解决方法就是修改策略文件， 从官方网站下载JCE无限制权限策略文件，注意自己JDK的版本别下错了。将local_policy.jar和US_export_policy.jar这两个文件替换%JRE_HOME%\lib\security和%JDK_HOME%\jre\lib\security下原来的文件，注意先备份原文件。
官方网站提供了JCE无限制权限策略文件的下载：
JDK6的下载地址：
http://www.oracle.com/technetwork/java/javase/downloads/jce-6-download-429243.html
JDK7的下载地址：
http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html
JDK8的下载地址：
http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html
下载后解压，可以看到local_policy.jar和US_export_policy.jar以及readme.txt。
然后后面一篇放实体类吧 我就不文字描述了。
下一篇：[微信支付实体类补发]
(https://www.jianshu.com/p/fd73ea49040e)
