今天就跟大家聊聊有关利用javaweb实现一个在线支付功能，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
具体内容如下
package com.learning.web.servlet;
import java.io.IOException;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.learning.utils.PaymentUtil;
@WebServlet("/payOnline")
public class PayOnline extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String orderid = request.getParameter("orderid");
String money = request.getParameter("money");
// 银行
String pd_FrpId = request.getParameter("pd_FrpId");
// 发给支付公司需要哪些数据
String p0_Cmd = "Buy";
String p1_MerId = ResourceBundle.getBundle("/WEB-INF/classes/merchantInfo").getString(
"p1_MerId");
String p2_Order = orderid;
String p3_Amt = money;
String p4_Cur = "CNY";
String p5_Pid = "";
String p6_Pcat = "";
String p7_Pdesc = "";
// 支付成功回调地址 ---- 第三方支付公司会访问、用户访问
// 第三方支付可以访问网址(本项目网址)
String p8_Url = "http://115.170.37.189/day19pay/callback";
String p9_SAF = "";
String pa_MP = "";
String pr_NeedResponse = "1";
// 加密hmac 需要密钥
String keyValue = ResourceBundle.getBundle("merchantInfo").getString(
"keyValue");
String hmac = PaymentUtil.buildHmac(p0_Cmd, p1_MerId, p2_Order, p3_Amt,
p4_Cur, p5_Pid, p6_Pcat, p7_Pdesc, p8_Url, p9_SAF, pa_MP,
pd_FrpId, pr_NeedResponse, keyValue);
// 生成url --- url?
request.setAttribute("pd_FrpId", pd_FrpId);
request.setAttribute("p0_Cmd", p0_Cmd);
request.setAttribute("p1_MerId", p1_MerId);
request.setAttribute("p2_Order", p2_Order);
request.setAttribute("p3_Amt", p3_Amt);
request.setAttribute("p4_Cur", p4_Cur);
request.setAttribute("p5_Pid", p5_Pid);
request.setAttribute("p6_Pcat", p6_Pcat);
request.setAttribute("p7_Pdesc", p7_Pdesc);
request.setAttribute("p8_Url", p8_Url);
request.setAttribute("p9_SAF", p9_SAF);
request.setAttribute("pa_MP", pa_MP);
request.setAttribute("pr_NeedResponse", pr_NeedResponse);
request.setAttribute("hmac", hmac);
request.getRequestDispatcher("/confirm.jsp").forward(request, response);
}
}2.用户确认提交的信息（confirm.jsp）
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="p" uri="http://www.itcast.cn/tag"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<p:user />
<!-- 确认支付form -->
<form action="https://www.yeepay.com/app-merchant-proxy/node"
method="get">
<h4>订单号：${p2_Order},付款金额 ：${p3_Amt }</h4>
<input type="hidden" name="pd_FrpId" value="${pd_FrpId }" /> <input
type="hidden" name="p0_Cmd" value="${p0_Cmd }" /> <input
type="hidden" name="p1_MerId" value="${p1_MerId }" /> <input
type="hidden" name="p2_Order" value="${p2_Order }" /> <input
type="hidden" name="p3_Amt" value="${p3_Amt }" /> <input
type="hidden" name="p4_Cur" value="${p4_Cur }" /> <input
type="hidden" name="p5_Pid" value="${p5_Pid }" /> <input
type="hidden" name="p6_Pcat" value="${p6_Pcat }" /> <input
type="hidden" name="p7_Pdesc" value="${p7_Pdesc }" /> <input
type="hidden" name="p8_Url" value="${p8_Url }" /> <input
type="hidden" name="p9_SAF" value="${p9_SAF }" /> <input
type="hidden" name="pa_MP" value="${pa_MP }" /> <input type="hidden"
name="pr_NeedResponse" value="${pr_NeedResponse }" /> <input
type="hidden" name="hmac" value="${hmac }" /> <input type="submit"
value="确认支付" />
</form>
</body>
</html>3.网站获得第三方支付的信息
package com.learning.web.servlet;
import java.io.IOException;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.learning.service.OrderService;
import com.learning.utils.PaymentUtil;
/**
* 该Servlet会在支付成功后 进行调用----- 支付公司 、客户
*
* @author seawind
*
*/
public class CallbackServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 获得回调所有数据
String p1_MerId = request.getParameter("p1_MerId");
String r0_Cmd = request.getParameter("r0_Cmd");
String r1_Code = request.getParameter("r1_Code");
String r2_TrxId = request.getParameter("r2_TrxId");
String r3_Amt = request.getParameter("r3_Amt");
String r4_Cur = request.getParameter("r4_Cur");
String r5_Pid = request.getParameter("r5_Pid");
String r6_Order = request.getParameter("r6_Order");
String r7_Uid = request.getParameter("r7_Uid");
String r8_MP = request.getParameter("r8_MP");
String r9_BType = request.getParameter("r9_BType");
String rb_BankId = request.getParameter("rb_BankId");
String ro_BankOrderId = request.getParameter("ro_BankOrderId");
String rp_PayDate = request.getParameter("rp_PayDate");
String rq_CardNo = request.getParameter("rq_CardNo");
String ru_Trxtime = request.getParameter("ru_Trxtime");
// 身份校验 --- 判断是不是支付公司通知你
String hmac = request.getParameter("hmac");
String keyValue = ResourceBundle.getBundle("merchantInfo").getString(
"keyValue");
// 自己对上面数据进行加密 --- 比较支付公司发过来hamc
boolean isValid = PaymentUtil.verifyCallback(hmac, p1_MerId, r0_Cmd,
r1_Code, r2_TrxId, r3_Amt, r4_Cur, r5_Pid, r6_Order, r7_Uid,
r8_MP, r9_BType, keyValue);
if (isValid) {
// 响应数据有效
if (r9_BType.equals("1")) {
// 浏览器重定向
response.setContentType("text/html;charset=utf-8");
response.getWriter().println("<h2>付款成功！等待商城进一步操作！等待收货...</h2>");
} else if (r9_BType.equals("2")) {
// 服务器点对点 --- 支付公司通知你
System.out.println("付款成功！");
// 修改订单状态 为已付款
OrderService orderService=new OrderService();
orderService.modifyOrderState(p1_MerId);
// 回复支付公司
response.getWriter().print("success");
}
} else {
// 数据无效
System.out.println("数据被篡改！");
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}文件：
merchantInfo.properties
p1_MerId=10001126856
keyValue=69cl522AV6q613Ii4W6u8K6XuW8vM1N6bFgyv769220IuYe9u37N4y7rI4Pl
responseURL=http://localhost:8080/onlinepay/servlet/PaymentResponse
工具类：PaymentUtil
package com.learning.utils;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
public class PaymentUtil {
private static String encodingCharset = "UTF-8";
/**
* 生成hmac方法
*
* @param p0_Cmd 业务类型
* @param p1_MerId 商户编号
* @param p2_Order 商户订单号
* @param p3_Amt 支付金额
* @param p4_Cur 交易币种
* @param p5_Pid 商品名称
* @param p6_Pcat 商品种类
* @param p7_Pdesc 商品描述
* @param p8_Url 商户接收支付成功数据的地址
* @param p9_SAF 送货地址
* @param pa_MP 商户扩展信息
* @param pd_FrpId 银行编码
* @param pr_NeedResponse 应答机制
* @param keyValue 商户密钥
* @return
*/
public static String buildHmac(String p0_Cmd,String p1_MerId,
String p2_Order, String p3_Amt, String p4_Cur,String p5_Pid, String p6_Pcat,
String p7_Pdesc,String p8_Url, String p9_SAF,String pa_MP,String pd_FrpId,
String pr_NeedResponse,String keyValue) {
StringBuilder sValue = new StringBuilder();
// 业务类型
sValue.append(p0_Cmd);
// 商户编号
sValue.append(p1_MerId);
// 商户订单号
sValue.append(p2_Order);
// 支付金额
sValue.append(p3_Amt);
// 交易币种
sValue.append(p4_Cur);
// 商品名称
sValue.append(p5_Pid);
// 商品种类
sValue.append(p6_Pcat);
// 商品描述
sValue.append(p7_Pdesc);
// 商户接收支付成功数据的地址
sValue.append(p8_Url);
// 送货地址
sValue.append(p9_SAF);
// 商户扩展信息
sValue.append(pa_MP);
// 银行编码
sValue.append(pd_FrpId);
// 应答机制
sValue.append(pr_NeedResponse);
return PaymentUtil.hmacSign(sValue.toString(), keyValue);
}
/**
* 返回校验hmac方法
*
* @param hmac 支付网关发来的加密验证码
* @param p1_MerId 商户编号
* @param r0_Cmd 业务类型
* @param r1_Code 支付结果
* @param r2_TrxId 易宝支付交易流水号
* @param r3_Amt 支付金额
* @param r4_Cur 交易币种
* @param r5_Pid 商品名称
* @param r6_Order 商户订单号
* @param r7_Uid 易宝支付会员ID
* @param r8_MP 商户扩展信息
* @param r9_BType 交易结果返回类型
* @param keyValue 密钥
* @return
*/
public static boolean verifyCallback(String hmac, String p1_MerId,
String r0_Cmd, String r1_Code, String r2_TrxId, String r3_Amt,
String r4_Cur, String r5_Pid, String r6_Order, String r7_Uid,
String r8_MP, String r9_BType, String keyValue) {
StringBuilder sValue = new StringBuilder();
// 商户编号
sValue.append(p1_MerId);
// 业务类型
sValue.append(r0_Cmd);
// 支付结果
sValue.append(r1_Code);
// 易宝支付交易流水号
sValue.append(r2_TrxId);
// 支付金额
sValue.append(r3_Amt);
// 交易币种
sValue.append(r4_Cur);
// 商品名称
sValue.append(r5_Pid);
// 商户订单号
sValue.append(r6_Order);
// 易宝支付会员ID
sValue.append(r7_Uid);
// 商户扩展信息
sValue.append(r8_MP);
// 交易结果返回类型
sValue.append(r9_BType);
String sNewString = PaymentUtil.hmacSign(sValue.toString(), keyValue);
return sNewString.equals(hmac);
}
/**
* @param aValue
* @param aKey
* @return
*/
public static String hmacSign(String aValue, String aKey) {
byte k_ipad[] = new byte[64];
byte k_opad[] = new byte[64];
byte keyb[];
byte value[];
try {
keyb = aKey.getBytes(encodingCharset);
value = aValue.getBytes(encodingCharset);
} catch (UnsupportedEncodingException e) {
keyb = aKey.getBytes();
value = aValue.getBytes();
}
Arrays.fill(k_ipad, keyb.length, 64, (byte) 54);
Arrays.fill(k_opad, keyb.length, 64, (byte) 92);
for (int i = 0; i < keyb.length; i++) {
k_ipad[i] = (byte) (keyb[i] ^ 0x36);
k_opad[i] = (byte) (keyb[i] ^ 0x5c);
}
MessageDigest md = null;
try {
md = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
return null;
}
md.update(k_ipad);
md.update(value);
byte dg[] = md.digest();
md.reset();
md.update(k_opad);
md.update(dg, 0, 16);
dg = md.digest();
return toHex(dg);
}
public static String toHex(byte input[]) {
if (input == null)
return null;
StringBuffer output = new StringBuffer(input.length * 2);
for (int i = 0; i < input.length; i++) {
int current = input[i] & 0xff;
if (current < 16)
output.append("0");
output.append(Integer.toString(current, 16));
}
return output.toString();
}
/**
*
* @param args
* @param key
* @return
*/
public static String getHmac(String[] args, String key) {
if (args == null || args.length == 0) {
return (null);
}
StringBuffer str = new StringBuffer();
for (int i = 0; i < args.length; i++) {
str.append(args[i]);
}
return (hmacSign(str.toString(), key));
}
/**
* @param aValue
* @return
*/
public static String digest(String aValue) {
aValue = aValue.trim();
byte value[];
try {
value = aValue.getBytes(encodingCharset);
} catch (UnsupportedEncodingException e) {
value = aValue.getBytes();
}
MessageDigest md = null;
try {
md = MessageDigest.getInstance("SHA");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
return null;
}
return toHex(md.digest(value));
}
// public static void main(String[] args) {
// System.out.println(hmacSign("AnnulCard1000043252120080620160450.0http://localhost/SZXpro/callback.asp杩?4564868265473632445648682654736324511","8UPp0KE8sq73zVP370vko7C39403rtK1YwX40Td6irH216036H27Eb12792t"));
// }
}看完上述内容，你们对利用javaweb实现一个在线支付功能有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注亿速云行业资讯频道，感谢大家的支持。
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