java服务器端微信、支付宝支付和退款功能
作者：居家帅哥
这篇文章主要为大家详细介绍了java服务器端微信、支付宝支付和退款功能，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
工作需要，写了服务器端的支付和退款功能，包含微信和支付宝，网上也有很多demo可以借鉴，我把我的代码放出来，写的比较简单，有问题的欢迎指正，大家一起学习。
微信支付需要调用微信的统一下单接口，而支付宝不用。
我写的时候微信和支付宝都单独写了一个工具类，来调用支付，给前端返回需要的数据。
ps：支付是可以不需要服务器端的，不过为了安全一点点，所以前端需要调起支付的字段都直接从服务器端返回，前端拿到字段直接调起支付就可以了。
Map<String,String> map = new HashMap<String,String>();
switch (record.getCheckType()) {
case 10:
map = Alipay.prePay(record.getAmount(),out_trade_no);
return ResponseData.ok(map);
case 20:
map = WXPay.prePay(record.getAmount(),out_trade_no);
return ResponseData.ok(map);
}
10是支付宝支付，20是微信支付，map里存放前端需要的字段，直接返回给手机端
其中out_trade_no这个是商户自己生成的唯一订单号
public class WXPay {
private static String url = String.format("https://api.mch.weixin.qq.com/pay/unifiedorder");
//统一下单
public static Map<String,String> prePay(BigDecimal amount,String out_trade_no){
String entity = genProductArgs(amount,out_trade_no);
byte[] buf = Util.httpPost(url, entity);
String content = new String(buf);
Map<String,String> xml=decodeXml(content);
return getRep(xml);
}
private static Map<String, String> getRep(Map<String, String> xml) {
Random random = new Random();
List<NameValuePair> signParams = new LinkedList<NameValuePair>();
signParams.add(new BasicNameValuePair("appid", Constants.APP_ID_WX));
signParams.add(new BasicNameValuePair("noncestr", MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes())));
// signParams.add(new BasicNameValuePair("package", "prepay_id="+xml.get("prepay_id")));
signParams.add(new BasicNameValuePair("package", "Sign=WXPay"));
signParams.add(new BasicNameValuePair("partnerid", Constants.MCH_ID));
signParams.add(new BasicNameValuePair("prepayid", xml.get("prepay_id")));
signParams.add(new BasicNameValuePair("timestamp", String.valueOf(System.currentTimeMillis() / 1000)));
xml.put("sign", genPackageSign(signParams));
for (int i = 0; i < signParams.size(); i++) {
xml.put(signParams.get(i).getName(),signParams.get(i).getValue());
}
return removeElements(xml);
}
private static Map<String, String> removeElements(Map<String, String> xml) {
xml.remove("appid");
xml.remove("mch_id");
xml.remove("nonce_str");
xml.remove("trade_type");
//xml.remove("partnerid");
xml.remove("prepay_id");
xml.remove("result_code");
xml.remove("return_code");
xml.remove("return_msg");
return xml;
}
private static String genProductArgs(BigDecimal amount,String out_trade_no) {
StringBuffer xml = new StringBuffer();
String nonceStr = genNonceStr();
xml.append("</xml>");
List<NameValuePair> packageParams = new LinkedList<NameValuePair>();
packageParams.add(new BasicNameValuePair("appid", Constants.APP_ID_WX));
packageParams.add(new BasicNameValuePair("body", "APP pay test"));
packageParams.add(new BasicNameValuePair("mch_id", Constants.MCH_ID));
packageParams.add(new BasicNameValuePair("nonce_str", nonceStr));
packageParams.add(new BasicNameValuePair("notify_url", "填写服务器的支付回调路径"));
packageParams.add(new BasicNameValuePair("out_trade_no",out_trade_no));
packageParams.add(new BasicNameValuePair("spbill_create_ip","127.0.0.1"));
packageParams.add(new BasicNameValuePair("total_fee", String.valueOf(amount.movePointRight(2))));
// packageParams.add(new BasicNameValuePair("total_fee", "1"));
packageParams.add(new BasicNameValuePair("trade_type", "APP"));
String sign = genPackageSign(packageParams);
packageParams.add(new BasicNameValuePair("sign", sign));
String xmlstring =toXml(packageParams);
return xmlstring;
}
public static String genNonceStr() {
Random random = new Random();
return MD5.getMessageDigest(String.valueOf(random.nextInt(10000)).getBytes());
}
public static String genPackageSign(List<NameValuePair> params) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < params.size(); i++) {
sb.append(params.get(i).getName());
sb.append('=');
sb.append(params.get(i).getValue());
sb.append('&');
}
sb.append("key=");
sb.append(Constants.API_KEY);
String packageSign = MD5.getMessageDigest(sb.toString().getBytes()).toUpperCase();
return packageSign;
}
public static String toXml(List<NameValuePair> params) {
StringBuilder sb = new StringBuilder();
sb.append("<xml>");
for (int i = 0; i < params.size(); i++) {
sb.append("<"+params.get(i).getName()+">");
sb.append(params.get(i).getValue());
sb.append("</"+params.get(i).getName()+">");
}
sb.append("</xml>");
return sb.toString();
}
}
public class Alipay {
public static Map<String,String> prePay(BigDecimal payAbleAmount,String out_trade_no){
//String orderInfo = getOrderInfo("订单付款", "订单付款",out_trade_no,"0.01");
String orderInfo = getOrderInfo("订单付款", "订单付款",out_trade_no,String.valueOf(payAbleAmount));
String sign = sign(orderInfo);
try {
/**
* 仅需对sign 做URL编码
*/
sign = URLEncoder.encode(sign, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
/**
* 完整的符合支付宝参数规范的订单信息
*/
final String payInfo = orderInfo + "&sign=\"" + sign + "\"&" + getSignType();
Map<String,String> map = new HashMap<String, String>();
map.put("payInfo", payInfo);
return map;
}
private static String getOrderInfo(String subject, String body,String out_trade_no,String price) {
// 签约合作者身份ID
String orderInfo = "partner=" + "\"" + Constants.PARTNER + "\"";
// 签约卖家支付宝账号
orderInfo += "&seller_id=" + "\"" + Constants.SELLER + "\"";
// 商户网站唯一订单号
orderInfo += "&out_trade_no=" + "\"" + out_trade_no + "\"";
// 商品名称
orderInfo += "&subject=" + "\"" + subject + "\"";
// 商品详情
orderInfo += "&body=" + "\"" + body + "\"";
// 商品金额
orderInfo += "&total_fee=" + "\"" + price + "\"";
// 服务器异步通知页面路径
orderInfo += "¬ify_url=" + "\"" + "填写服务器的支付回调路径" + "\"";
// 服务接口名称， 固定值
orderInfo += "&service=\"mobile.securitypay.pay\"";
// 支付类型， 固定值
orderInfo += "&payment_type=\"1\"";
// 参数编码， 固定值
orderInfo += "&_input_charset=\"utf-8\"";
// 设置未付款交易的超时时间
// 默认30分钟，一旦超时，该笔交易就会自动被关闭。
// 取值范围：1m～15d。
// m-分钟，h-小时，d-天，1c-当天（无论交易何时创建，都在0点关闭）。
// 该参数数值不接受小数点，如1.5h，可转换为90m。
orderInfo += "&it_b_pay=\"30m\"";
// extern_token为经过快登授权获取到的alipay_open_id,带上此参数用户将使用授权的账户进行支付
// orderInfo += "&extern_token=" + "\"" + extern_token + "\"";
// 支付宝处理完请求后，当前页面跳转到商户指定页面的路径，可空
orderInfo += "&return_url=\"m.alipay.com\"";
// 调用银行卡支付，需配置此参数，参与签名， 固定值 （需要签约《无线银行卡快捷支付》才能使用）
// orderInfo += "&paymethod=\"expressGateway\"";
return orderInfo;
}
private static String sign(String content) {
return SignUtils.sign(content, Constants.RSA_PRIVATE);
}
private static String getSignType() {
return "sign_type=\"RSA\"";
}
}
退款部分
支付宝
String strResponse = null;
AlipayTradeRefundResponse response = null;
try {
AlipayClient alipayClient = new DefaultAlipayClient(url,Constants.APPID_ALIPAY,Constants.RSA_PRIVATE,"json","utf-8",Constants.RSA_PUBLIC);
AlipayTradeRefundRequest request = new AlipayTradeRefundRequest();
RefundInfo alidata = new RefundInfo();
alidata.setOut_trade_no(out_trade_no);
alidata.setRefund_amount(refund_amount);
request.setBizContent(JSON.toJSONString(alidata));
response = alipayClient.sdkExecute(request);
if (response.isSuccess()) {
strResponse="退款成功";
} else {
strResponse="退款失败";
}
return strResponse;
} catch (Exception e) {
strResponse="退款出错";
}
return strResponse;
微信
public class WXRefund {
private static final String url = "https://api.mch.weixin.qq.com/secapi/pay/refund";
/**
* 微信退款
* @param out_trade_no 商户订单号
* @param total_fee 总金额
* @param refund_fee 退款金额
* @return
*/
public static String doRefund(String out_trade_no,int total_fee,int refund_fee) {
InputStream instream = null;
KeyStore keyStore = null;
CloseableHttpResponse response = null;
CloseableHttpClient httpclient = null;
StringBuilder text = new StringBuilder();
String key = Constants.MCH_ID;
try {
/**
* 注意PKCS12证书 是从微信商户平台-》账户设置-》 API安全 中下载的
*/
keyStore = KeyStore.getInstance("PKCS12");
instream = WXRefund.class.getResourceAsStream("/apiclient_cert.p12");//P12文件
/**
* 此处要改
*/
keyStore.load(instream, key.toCharArray());// 这里写密码..默认是MCHID
/**
* 此处要改
*/
SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, key.toCharArray())// 这里也是写密码的
.build();
// Allow TLSv1 protocol only
SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null, SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
httpclient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
//=======================证书配置完成========================
HttpPost httpPost = new HttpPost(url);
String xmlstring = getRefunArgs(out_trade_no,total_fee,refund_fee);
httpPost.setEntity(new StringEntity(xmlstring));
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
response = httpclient.execute(httpPost);
HttpEntity entity = response.getEntity();
if (entity != null) {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
String str;
while ((str = bufferedReader.readLine()) != null) {
text.append(str);
}
}
EntityUtils.consume(entity);
}catch(Exception e){
}finally {
if(instream != null){
try {
instream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(response != null){
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(httpclient != null){
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Map<String,String> map = WXPay.decodeXml(text.toString());
String return_msg = map.get("return_msg");
if ("OK".equals(return_msg) && "SUCCESS".equals(map.get("return_code"))) {
return "退款成功";
}
return return_msg;
}
//设置请求参数的值
private static String getRefunArgs(String out_trade_no,int total_fee,int refund_fee) {
String nonce_str = WXPay.genNonceStr();
List<NameValuePair> packageParams = new LinkedList<NameValuePair>();
packageParams.add(new BasicNameValuePair("appid", Constants.APP_ID_WX));
packageParams.add(new BasicNameValuePair("mch_id", Constants.MCH_ID));
packageParams.add(new BasicNameValuePair("nonce_str", nonce_str));
packageParams.add(new BasicNameValuePair("op_user_id", Constants.MCH_ID));
packageParams.add(new BasicNameValuePair("out_refund_no",out_trade_no));
packageParams.add(new BasicNameValuePair("out_trade_no",out_trade_no));
packageParams.add(new BasicNameValuePair("refund_fee", String.valueOf(refund_fee)));
packageParams.add(new BasicNameValuePair("total_fee", String.valueOf(total_fee)));
String sign = WXPay.genPackageSign(packageParams);
packageParams.add(new BasicNameValuePair("sign", sign));
return WXPay.toXml(packageParams);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。