怎么可以错过（java支付接口开发）java支付系统源码，Java对接支付宝支付不会搞？看这里详细图解案例！，java支付宝在线支付，

<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.3.3.RELEASE</version><relativePath/></parent><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>com.alipay.sdk</groupId><artifactId>alipay-sdk-java</artifactId><version>4.10.124.ALL</version></dependency><dependency><groupId>org.apache.tomcat.embed</groupId><artifactId>tomcat-embed-jasper</artifactId><scope>provided</scope></dependency></dependencies>

#页面默认前缀目录spring.mvc.view.prefix=/#响应页面默认后缀spring.mvc.view.suffix=.jsp#修改访问的端口号server.port=8081#设置访问的项目路径server.servlet.context-path=/

public class AppUtil {// 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号public static String app_id = "xxx";// 商户私钥，您的PKCS8格式RSA2私钥public static String merchant_private_key="xxx";// 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。public static String alipay_public_key = "xxx";// 服务器异步通知页面路径//需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问public static String notify_url = "xxx";// 页面跳转同步通知页面路径//需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问public static String return_url = "xxx";// 签名方式public static String sign_type = "RSA2";// 字符编码格式public static String charset = "utf-8";// 支付宝网关,注意这些使用的是沙箱的支付宝网关，与正常网关的区别是多了devpublic static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";// 支付宝网关public static String log_path = "C:\\";/*** 写日志，方便测试（看网站需求，也可以改成把记录存入数据库）* @param sWord 要写入日志里的文本内容*/public static void logResult(String sWord) {FileWriter writer = null;try {writer = new FileWriter(log_path + "alipay_log_" + System.currentTimeMillis()+".txt");writer.write(sWord);} catch (Exception e) {e.printStackTrace();} finally {if (writer != null) {try {writer.close();} catch (IOException e) {e.printStackTrace();}}}}}

package com.qfedu.utils;import com.alipay.api.AlipayClient;import com.alipay.api.DefaultAlipayClient;import com.alipay.api.request.AlipayTradePagePayRequest;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;/*** 提供支付宝相关的一些对象*/@Configurationpublic class BeanUtils {//创建支付宝需要的客户端对象@Beanpublic AlipayClient alipayClient(){return new DefaultAlipayClient(AppUtils.gatewayUrl,AppUtils.app_id,AppUtils.merchant_private_key,"json",AppUtils.charset,AppUtils.alipay_public_key,AppUtils.sign_type);}//创建一个支付宝的请求对象@Beanpublic AlipayTradePagePayRequest alipayTradePagePayRequest(){return new AlipayTradePagePayRequest();}}

package com.web;import com.alipay.api.AlipayApiException;import com.alipay.api.AlipayClient;import com.alipay.api.request.AlipayTradePagePayRequest;import com.zhifubao.AppUtil;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.annotation.Resource;import javax.servlet.http.HttpServletResponse;import java.io.IOException;@Controllerpublic class PayController {@Resourceprivate AlipayClient alipayClient;@Resourceprivate AlipayTradePagePayRequest alipayTradePagePayRequest;//处理支付请求//1.接收页面传过来的数据:订单号，金额，名称，商品描述 表单中的name值=参数名@RequestMapping("/pay")public void pay(String WIDout_trade_no, String WIDsubject, String WIDtotal_amount, String WIDbody, HttpServletResponse response)throws AlipayApiException, IOException {//2.获得支付的客户端AlipayClient,和配置支付信息的对象AlipayTradePagePayRequest//3.设置响应的地址(支付宝返回给商户的响应地址)alipayTradePagePayRequest.setNotifyUrl(AppUtil.notify_url);alipayTradePagePayRequest.setReturnUrl(AppUtil.return_url);//4.设置请求的参数(传递给支付宝的数据)alipayTradePagePayRequest.setBizContent("{\"out_trade_no\":\""+ WIDout_trade_no +"\","+ "\"total_amount\":\""+ WIDtotal_amount +"\","+ "\"subject\":\""+ WIDsubject +"\","+ "\"body\":\""+ WIDbody +"\","+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");//5.发送请求String result = alipayClient.pageExecute(alipayTradePagePayRequest).getBody();//6.将响应结果返回给前端response.setContentType("text/html;charset=utf-8");response.getWriter().println(result);}}

package com.web;import com.alipay.api.AlipayApiException;import com.alipay.api.internal.util.AlipaySignature;import com.zhifubao.AppUtil;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.Iterator;import java.util.Map;@Controllerpublic class NotifyController {//接收支付宝返回的异步通知的信息@RequestMapping("/getnotify")public void getnotify(HttpServletRequest request, HttpServletResponse response) throws AlipayApiException, IOException {//支付宝POST过来反馈信息Map<String,String> params = new HashMap<String,String>();Map<String,String[]> requestParams = request.getParameterMap();Iterator<String> iter = requestParams.keySet().iterator();while(iter.hasNext()){String name = (String) iter.next();String[] values = (String[]) requestParams.get(name);String valueStr = "";for (int i = 0; i < values.length; i++) {valueStr = (i == values.length - 1) ? valueStr + values[i]: valueStr + values[i] + ",";}params.put(name, valueStr);}boolean signVerified = AlipaySignature.rsaCheckV1(params, AppUtil.alipay_public_key, AppUtil.charset, AppUtil.sign_type); //调用SDK验证签名/** 实际验证过程建议商户务必添加以下校验：*/response.setContentType("text/html;charset=utf-8");PrintWriter out = response.getWriter();if(signVerified) {//验证成功//商户订单号String out_trade_no =request.getParameter("out_trade_no");//支付宝交易号String trade_no = request.getParameter("trade_no");//交易状态String trade_status = request.getParameter("trade_status");if(trade_status.equals("TRADE_FINISHED")){//判断该笔订单是否在商户网站中已经做过处理}else if (trade_status.equals("TRADE_SUCCESS")){//判断该笔订单是否在商户网站中已经做过处理}out.println("success");}else {out.println("fail");}}}

natapp -authtoken=515e20ec42809ab6

package com.web;import com.alipay.api.AlipayApiException;import com.alipay.api.internal.util.AlipaySignature;import com.zhifubao.AppUtil;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.Iterator;import java.util.Map;@Controllerpublic class ReturnController {@RequestMapping("/getreturn")public void getreturn(HttpServletRequest request, HttpServletResponse response) throws AlipayApiException, IOException {//获取支付宝GET过来反馈信息Map<String,String> params = new HashMap<String,String>();Map<String,String[]> requestParams = request.getParameterMap();Iterator<String> iter = requestParams.keySet().iterator();while(iter.hasNext()){String name = (String) iter.next();String[] values = (String[]) requestParams.get(name);String valueStr = "";for (int i = 0; i < values.length; i++) {valueStr = (i == values.length - 1) ? valueStr + values[i]: valueStr + values[i] + ",";}params.put(name, valueStr);}//RSA2验证boolean signVerified = AlipaySignature.rsaCheckV2(params, AppUtil.alipay_public_key, AppUtil.charset, AppUtil.sign_type); //调用SDK验证签名response.setContentType("text/html;charset=utf-8");PrintWriter out = response.getWriter();if(signVerified) {//商户订单号String out_trade_no = request.getParameter("out_trade_no");//支付宝交易号String trade_no = request.getParameter("trade_no");//付款金额String total_amount = request.getParameter("total_amount");out.println("trade_no:"+trade_no+"<br/>out_trade_no:"+out_trade_no+"<br/>total_amount:"+total_amount);}else {out.println("验签失败");}}}

<%@ page language="java" contentType="text/html; charset=utf-8"pageEncoding="utf-8"%><!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>支付宝网站支付</title><style>* {margin: 0;padding: 0;}ul, ol {list-style: none;}body {font-family: "Helvetica Neue", Helvetica, Arial, "Lucida Grande",sans-serif;}.tab-head {margin-left: 120px;margin-bottom: 10px;}.tab-content {clear: left;display: none;}h2 {border-bottom: solid #02aaf1 2px;width: 200px;height: 25px;margin: 0;float: left;text-align: center;font-size: 16px;}.selected {color: #FFFFFF;background-color: #02aaf1;}.show {clear: left;display: block;}.hidden {display: none;}.new-btn-login-sp {padding: 1px;display: inline-block;width: 75%;}.new-btn-login {background-color: #02aaf1;color: #FFFFFF;font-weight: bold;border: none;width: 100%;height: 30px;border-radius: 5px;font-size: 16px;}#main {width: 100%;margin: 0 auto;font-size: 14px;}.red-star {color: #f00;width: 10px;display: inline-block;}.null-star {color: #fff;}.content {margin-top: 5px;}.content dt {width: 100px;display: inline-block;float: left;margin-left: 20px;color: #666;font-size: 13px;margin-top: 8px;}.content dd {margin-left: 120px;margin-bottom: 5px;}.content dd input {width: 85%;height: 28px;border: 0;-webkit-border-radius: 0;-webkit-appearance: none;}#foot {margin-top: 10px;position: absolute;bottom: 15px;width: 100%;}.foot-ul {width: 100%;}.foot-ul li {width: 100%;text-align: center;color: #666;}.note-help {color: #999999;font-size: 12px;line-height: 130%;margin-top: 5px;width: 100%;display: block;}#btn-dd {margin: 20px;text-align: center;}.foot-ul {width: 100%;}.one_line {display: block;height: 1px;border: 0;border-top: 1px solid #eeeeee;width: 100%;margin-left: 20px;}.am-header {display: -webkit-box;display: -ms-flexbox;display: box;width: 100%;position: relative;padding: 7px 0;-webkit-box-sizing: border-box;-ms-box-sizing: border-box;box-sizing: border-box;background: #1D222D;height: 50px;text-align: center;-webkit-box-pack: center;-ms-flex-pack: center;box-pack: center;-webkit-box-align: center;-ms-flex-align: center;box-align: center;}.am-header h1 {-webkit-box-flex: 1;-ms-flex: 1;box-flex: 1;line-height: 18px;text-align: center;font-size: 18px;font-weight: 300;color: #fff;}</style></head><body text=#000000 bgColor="#ffffff" leftMargin=0 topMargin=4><header class="am-header"><h1>支付宝体验入口页</h1></header><div id="main"><div id="tabhead" class="tab-head"><h2 id="tab1" class="selected" name="tab">付 款</h2></div><form name=alipayment action=pay method=posttarget="_blank"><div id="body1" class="show" name="divcontent"><dl class="content"><dt>商户订单号 ：</dt><dd><input id="WIDout_trade_no" name="WIDout_trade_no" /></dd><hr class="one_line"><dt>订单名称 ：</dt><dd><input id="WIDsubject" name="WIDsubject" /></dd><hr class="one_line"><dt>付款金额 ：</dt><dd><input id="WIDtotal_amount" name="WIDtotal_amount" /></dd><hr class="one_line"><dt>商品描述：</dt><dd><input id="WIDbody" name="WIDbody" /></dd><hr class="one_line"><dt></dt><dd id="btn-dd"><span class="new-btn-login-sp"><button class="new-btn-login" type="submit"style="text-align: center;">付 款</button></span> <span class="note-help">如果您点击“付款”按钮，即表示您同意该次的执行操作。</span></dd></dl></div></form><div id="foot"><ul class="foot-ul"><li>版权所有2022</li></ul></div></div></body><script language="javascript">function GetDateNow() {var vNow = new Date();var sNow = "";sNow += String(vNow.getFullYear());sNow += String(vNow.getMonth() + 1);sNow += String(vNow.getDate());sNow += String(vNow.getHours());sNow += String(vNow.getMinutes());sNow += String(vNow.getSeconds());sNow += String(vNow.getMilliseconds());document.getElementById("WIDout_trade_no").value = sNow;document.getElementById("WIDsubject").value = "测试";document.getElementById("WIDtotal_amount").value = "0.01";}GetDateNow();</script></html>