1.你应该知道的前提知识
1.1沙箱环境
沙箱环境 (Beta) 是支付宝开放平台为您提供的与线上环境完全隔离的联调测试环境，在沙箱环境中完成的调用不会对线上数据造成任何影响，尤其适合涉及资金链路的能力的调试。
1.2 配置沙箱应用环境
开放平台-沙箱环境 (alipay.com)
使用支付宝，扫描后，进行简单用户注册
使用开发者账号登录 开放平台控制台 > 开发服务，（用支付宝扫码，授权登录，然后根据页面输入注册信息）
输入注册后，即可点击 研发服务 即可进入 沙箱环境。
1.3 三个重要的信息
商户UID,公钥 ，私钥,程序中需要使用：
点击3 可以看公私匙
![](支付宝支付的开发步骤
.assets/image-20211203204239614.png
2.创建maven web项目
以商品购买为例演示，请忽略页面样式效果
3.额外添加依赖包
<dependency>
<groupId>com.alipay.sdk</groupId>
<artifactId>alipay-sdk-java</artifactId>
<version>4.9.28.ALL</version>
</dependency>4.封装配置和调用支付工具类
4.1 AlipayConfig
配置类，用来封装支付宝的三个重要信息： 商户UID,公钥 ，私钥
package com.bobo.utils;
public class AlipayConfig {
public static String app_id = "20210118*****";//uid
public static String merchant_private_key = "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";
public static String alipay_public_key = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvvuUyc6SO4CwpeHx1nHyKrYw5alwoBVIjb6hV15N2ntOCradUk7Tp69nm08yLE9W6nIv/H8CrKVMv/FX7zJOugT4EGQbqs3rADpQLu2of8YqCz4aXISktKO//g5SeMH4ejWUk/P3TWNplJrbqkAuzRrCxRHWj8AAeFiBNxlUeJFdGMWnXIrr3doBVhAoD+SjPnchOFFxAjZ6MR/75FZKMjU/M8pmG5fcD8dS/9OtSbVDa8NFn19SVeyzwpOHuA4eOdCc3cacOYGutke5dR0CRJxPMQUTeeQebkfgKnA3EjCjGovSryu7gKIiQCbBHvc61s9K1wYWh97odtzngfHlBwIDAQAB";
public static String notify_url = "http://localhost/list";//
public static String return_url = "http://localhost/queryResult";//支付完回调地址，用来查询订单支付状态
public static String sign_type = "RSA2";
public static String charset = "utf-8";
public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";
}4.2 AlibabapayGateWayUtils
支付和查询支付状态类
package com.bobo.utils;
import com.alibaba.fastjson.JSON;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.alipay.api.request.AlipayTradeQueryRequest;
import com.alipay.api.response.AlipayTradeQueryResponse;
import java.util.HashMap;
import java.util.Map;
public class AlibabapayGateWayUtils {
/**
*调用支付接口
* @param orderID 订单号
* @param total_amount 支付金额
* @param subject 商品名称
* @param body 商品描述
* @return
*/
public static String createOrder(String orderID,String total_amount,String subject,String body) throws AlipayApiException {
Map<String,String> map = new HashMap<>();
map.put("out_trade_no",orderID);
map.put("trade_no",orderID);
map.put("total_amount",total_amount);
map.put("subject",subject);
// 该笔订单允许的最晚付款时间，逾期将关闭交易。取值范围：1m～15d。m-分钟，h-小时，d-天，1c-当天（1c-当天的情况下，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。
String timeout_express = "1c";
map.put("timeout_express",timeout_express);
map.put("product_code","FAST_INSTANT_TRADE_PAY");
AlipayClient alipayClient = getAlipayClient();
//设置请求参数
AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
alipayRequest.setReturnUrl(AlipayConfig.return_url);
alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
alipayRequest.setBizContent(JSON.toJSONString(map));
String result = alipayClient.pageExecute(alipayRequest).getBody();
return result;
}
private static AlipayClient getAlipayClient() {
return new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
}
/**
* 支付后，用来查询订单状态信息
* @param map
* @return
* @throws AlipayApiException
*/
public AlipayTradeQueryResponse queryOrder(Map<String, String> map) throws AlipayApiException {
AlipayClient alipayClient = getAlipayClient();
//构造API请求
AlipayTradeQueryRequest request = new AlipayTradeQueryRequest();
request.setBizContent(JSON.toJSONString(map));//订单允许的最晚付款时间
//发送请求
AlipayTradeQueryResponse response = alipayClient.certificateExecute(request);
System.out.println("请求支付宝查询接口返回的结果为:"+response.getBody());
return response;
}
}5.项目中使用工具类
去支付
@ResponseBody
@RequestMapping(value = "goPay", produces = "text/html; charset=UTF-8")
public String goPay(Orders orders) throws AlipayApiException {
String s = AlibabapayGateWayUtils.createOrder(orders.getId(), orders.getTotalMoney()+"", "测试数据", "描述");
return s;
}6.效果
6.1 商品列表
6.2 购买
6.3 跳转到订单页面
6.4 点击支付宝支付
6.4.1跳转到支付页面
如果使用点下一步，则进入下图
6.4.2 支付页面
输入密码：111111
6.4.3 交易成功
6.4.4 自动跳转到 回调页面
即AilipayConfig的配置的回调地址