基于Java代码实现支付充值的通用流程

废话不多说了，直接给大家贴java代码了。

具体代码如下所示：

@RequestMapping(value = "/paySubmit.htm", method = RequestMethod.POST)
public ModelAndView paySubmit(HttpServletRequest request,
HttpServletResponse response, @RequestParam Map maps){
ModelAndView model = new ModelAndView("***/submit");

return model;
}

<%@ page contentType="text/html;charset=UTF-8" language="java" trimDirectiveWhitespaces="true" %>
<%@ page import="com.***.util.PayUtil" %>









<%
request.setCharacterEncoding("UTF-8");
String type = (String) request.getAttribute("type");
String sHtmlText = "";
if ("1".equals(type)){
sHtmlText = PayUtil.buildForm(
(String) request.getAttribute("orderNo"),
(String) request.getAttribute("amt"),type);
}else{
sHtmlText = PayUtil.allInPaybuildForm(
(String) request.getAttribute("orderNo"),
(String) request.getAttribute("amt"),type,request);
}
out.println(sHtmlText);
%>




public static String buildRequest(String url, Map sPara, String strMethod) {
ArrayList keys = new ArrayList(sPara.keySet());
StringBuffer sbHtml = new StringBuffer();
sbHtml.append("");
sbHtml.append("");
return sbHtml.toString();
}

public static String buildForm(String orderNo, String amt,String type) {
//商户编号
String merchantid = PropertiesRead.use_classLoador().getProperty("CMBC.pay.id");
//订单编号 商户的交易定单号,由商户网站生成,最大长度30
String merorderid = orderNo;
//金 额
String amountsum = amt;
//商品种类
String subject = PropertiesRead.use_classLoador().getProperty("CMBC.pay.type");//"empty";
//币 种 01 为cny
String currencytype = "01";
//自动调转取货页面0→不跳转；1→跳转
String autojump = "1";
//跳转等待时间
String waittime = "0";
//商户取货URL 
String merurl = PropertiesRead.use_classLoador().getProperty("CMBC.pay.return.page.url"); 
//是否通知商户: 0→不通知；1→通知
String informmer = "1";
//商户通知URL
String informurl = PropertiesRead.use_classLoador().getProperty("CMBC.pay.return.notify.url");

String confirm = "1";
//支付银行
String merbank = "empty";
//支付类型 0→即时到账；1→担保交易
String tradetype = "0";
//是否在商户端选择银行:0→其他；1→在商户端选择银行
String bankInput = "0";
//接口版本
String strInterface = "5.00";
//备 注 (可选) 支付备注信息,最大长度50
String remark = "充值";
//支付银行卡类型 00→借贷混合；01→纯借记
String bankcardtype = "00";
//商品描述
String pdtdnm = "虚拟商品";
//商品描述地址
String pdtdetailurl = PropertiesRead.use_classLoador().getProperty("CMBC.pay.return.detail.url");
//支付密钥(必填): 需在支付平台进行设置,可登录商户管理系统进行维护,用于上送商户支付及下传支付结果加密
String MD5key = PropertiesRead.use_classLoador().getProperty("CMBC.pay.pwd");
//拼接加密的源字符串
String mac_src="merchantid="+merchantid+"&merorderid="+merorderid
+"&amountsum="+amountsum+"&subject="+subject
+"¤cytype="+currencytype+"&autojump="+autojump
+ "&waittime=" + waittime +"&merurl="+merurl
+ "&informmer=" + informmer +"&informurl=" +informurl
+ "&confirm=" + confirm + "&merbank=" + merbank
+ "&tradetype=" + tradetype + "&bankInput=" + bankInput
+ "&interface=" + strInterface + "&bankcardtype=" + bankcardtype
+ "&pdtdetailurl=" + pdtdetailurl + "&merkey="+MD5key;
String mac = Crypto.GetMessageDigest(mac_src);
// 把请求参数打包成map
Map sParaTemp = new HashMap();
sParaTemp.put("merchantid", merchantid);
sParaTemp.put("merorderid", merorderid);
sParaTemp.put("amountsum", amountsum);
sParaTemp.put("subject", subject);
sParaTemp.put("currencytype", currencytype);
sParaTemp.put("autojump", autojump);
sParaTemp.put("waittime", waittime);
sParaTemp.put("merurl", merurl);
sParaTemp.put("informmer", informmer);
sParaTemp.put("informurl", informurl);
sParaTemp.put("/confirm/i", /confirm/i);
sParaTemp.put("merbank", merbank);
sParaTemp.put("tradetype", tradetype);
sParaTemp.put("bankInput", bankInput);
sParaTemp.put("interface", strInterface);
sParaTemp.put("remark", remark);
sParaTemp.put("bankcardtype", bankcardtype);
sParaTemp.put("pdtdnm", pdtdnm);
sParaTemp.put("pdtdetailurl", pdtdetailurl);
sParaTemp.put("mac", mac);
//建立请求
String sHtmlText = buildRequest(PropertiesRead.use_classLoador().getProperty("CMBC.pay.url"), sParaTemp, "post");
logger.info("McPay request: {}", sHtmlText);
return sHtmlText;
}
/" Crypto.java 代码如下 "/
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Crypto {

public static String GetMessageDigest(String strSrc) {
MessageDigest md = null;
String strDes = null;
final String ALGO_MD5 = "MD5";
byte[] bt = strSrc.getBytes();
try {
md = MessageDigest.getInstance(ALGO_MD5);
md.update(bt);
strDes = bytes2Hex(md.digest());
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException(
"系统不支持的MD5算法！");
}
return strDes;
}

public static String bytes2Hex(byte[] bts) {
String des = "";
String tmp = null;
for (int i = 0; i < bts.length; i++) {
tmp = (Integer.toHexString(bts[i] & 0xFF));
if (tmp.length() == 1) {
des += "0";
}
des += tmp;
}
return des;
}
}

@RequestMapping(value = "/allPayReturn.htm", method = RequestMethod.POST)
public ModelAndView allInPayReturnCall(HttpServletRequest request,
HttpServletResponse response, @RequestParam Map maps){
ModelAndView model = new ModelAndView("***/payReturn");

return model;
}

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