引入依赖
com.github.wechatpay-apiv3 wechatpay-apache-httpclient0.2.3
小程序代码 具体实现，只需要替换参数
@Override
public AjaxResult wxPayOrder(Double money, String orderNo) {
try {
DyUser loginUser = tokenServices.getLoginUser();
JSonObject order = new JSonObject();
order.put("appid", payConfig.getAppId());
order.put("mchid", payConfig.getMchId());
order.put("description", "充值-店员商城VIP会员");
order.put("out_trade_no", orderNo);
order.put("notify_url", payConfig.getNotifyUrl());
JSonObject amount = new JSonObject();
amount.put("total", (long)(money * 100));
amount.put("currency", "CNY");
order.put("amount", amount);
JSonObject payer = new JSonObject();
payer.put("openid", loginUser.getOpenId());
order.put("payer", payer);
PrivateKey merchantPrivateKey = PemUtil.loadPrivateKey(new FileInputStream(ResourceUtils.getFile(payConfig.getMerchantPrivateKey())));
//不需要传入微信支付证书了
AutoUpdateCertificatesVerifier verifier = new AutoUpdateCertificatesVerifier(
new WechatPay2Credentials(payConfig.getMchId(), new PrivateKeySigner(payConfig.getMerchantSerialNumber(), merchantPrivateKey)),
payConfig.getApiKey().getBytes("utf-8"));
WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
.withMerchant(payConfig.getMchId(), payConfig.getMerchantSerialNumber(), merchantPrivateKey)
.withValidator(new WechatPay2Validator(verifier));
// ... 接下来，你仍然可以通过builder设置各种参数，来配置你的HttpClient
// 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
HttpClient httpClient = builder.build();
HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi");
httpPost.addHeader("Accept", "application/json");
httpPost.addHeader("Content-type","application/json; charset=utf-8");
httpPost.setEntity(new StringEntity(order.toJSonString(), "UTF-8"));
// 后面跟使用Apache HttpClient一样
HttpResponse response = httpClient.execute(httpPost);
String bodyAsString = EntityUtils.toString(response.getEntity());
JSonObject bodyAsJSON = JSONObject.parseObject(bodyAsString);
if(bodyAsJSON.containsKey("code")) {
return new AjaxResult(1, bodyAsJSON.getString("message"));
}
final String prepay_id = bodyAsJSON.getString("prepay_id");
final String timeStamp = String.valueOf(System.currentTimeMillis());
final String nonceStr = RandomStringGenerator.getRandomStringByLength(32);
StringBuffer stringBuffer = new StringBuffer();
stringBuffer.append(payConfig.getAppId() + "n");
stringBuffer.append(timeStamp + "n");
stringBuffer.append(nonceStr + "n");
stringBuffer.append("prepay_id="+prepay_id+"n");
Signature signature = Signature.getInstance("SHA256withRSA");
signature.initSign(merchantPrivateKey);
signature.update(stringBuffer.toString().getBytes("UTF-8"));
byte[] signBytes = signature.sign();
String paySign = base64.encodeBytes(signBytes);
JSonObject params = new JSonObject();
params.put("appId", payConfig.getAppId());
params.put("timeStamp", timeStamp);
params.put("nonceStr", nonceStr);
params.put("prepay_id", prepay_id);
params.put("signType", "RSA");
params.put("paySign", paySign);
return AjaxResult.success(params);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
退款也一样需要依赖，具体实现差不多，注意证书路径
@Override
public AjaxResult wxRefund(String orderNo) {
try {
DyPaymentHistory dyorders = historyMapper.getHistoryOrderNo(orderNo);
//判断订单书否存在
if(dyorders==null){
return AjaxResult.error(301001,"订单不存在");
}
if(dyorders.getPayType()!=3){
return AjaxResult.error(301001,"订单状态异常");
}
JSonObject order = new JSonObject();
order.put("out_trade_no", orderNo);
//生成退款单号
long refudnOrderNo = IdUtil.getSnowflake(1, 2).nextId();
order.put("out_refund_no", refudnOrderNo+"");
//订单金额信息
JSonObject amount = new JSonObject();
BigDecimal num = new BigDecimal("100");
BigDecimal paymoney = dyorders.getPayMoney().multiply(num);
amount.put("refund", paymoney);
amount.put("total", paymoney);
amount.put("currency", "CNY");
order.put("amount", amount);
PrivateKey merchantPrivateKey = PemUtil.loadPrivateKey(new FileInputStream(ResourceUtils.getFile(payConfig.getMerchantPrivateKey())));
//不需要传入微信支付证书了
AutoUpdateCertificatesVerifier verifier = new AutoUpdateCertificatesVerifier(
new WechatPay2Credentials(payConfig.getMchId(), new PrivateKeySigner(payConfig.getMerchantSerialNumber(), merchantPrivateKey)),
payConfig.getApiKey().getBytes("utf-8"));
WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
.withMerchant(payConfig.getMchId(), payConfig.getMerchantSerialNumber(), merchantPrivateKey)
.withValidator(new WechatPay2Validator(verifier));
HttpClient httpClient = builder.build();
HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/refund/domestic/refunds");
httpPost.addHeader("Accept", "application/json");
httpPost.addHeader("Content-type","application/json; charset=utf-8");
httpPost.setEntity(new StringEntity(order.toJSonString(), "UTF-8"));
HttpResponse response = httpClient.execute(httpPost);
String bodyAsString = EntityUtils.toString(response.getEntity());
JSonObject bodyAsJSON = JSONObject.parseObject(bodyAsString);
if(bodyAsJSON.containsKey("code")) {
return new AjaxResult(1, bodyAsJSON.getString("message"));
}
dyorders.setPayType(2L);
historyMapper.updateDyPaymentHistory(dyorders);
return AjaxResult.success(bodyAsJSON);
}catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
具体异常抛出我还没处理，根据自己业务定义吧
