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。
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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
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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(); }
} |
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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
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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
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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。
原文链接：https://blog.csdn.net/l269327509/article/details/53518401
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