springboot+mybatis整合支付宝支付

准备支付宝沙箱环境

需要三个网站来准备支付宝的沙箱环境：

具体配置过程百度即可

bean类

package cn.edu.guet.bean;

/**
 * @author George
 * @project DormitorySystem
 * @package cn.edu.guet.bean
 * @date 2021/7/22 11:35
 * @since 1.0
 */
public class AlipayBean {
    /**
     * 商户订单号，必填
     *
     */
    private String out_trade_no;
    /**
     * 订单名称，必填
     */
    private String subject;
    /**
     * 付款金额，必填
     * 根据支付宝接口协议，必须使用下划线
     */
    private String total_amount;
    /**
     * 商品描述，可空
     */
    private String body;
    /**
     * 超时时间参数
     */
    private String timeout_express= "10m";
    /**
     * 产品编号
     */
    private String product_code= "FAST_INSTANT_TRADE_PAY";

    public String getOut_trade_no() {
        return out_trade_no;
    }

    public void setOut_trade_no(String out_trade_no) {
        this.out_trade_no = out_trade_no;
    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public String getTotal_amount() {
        return total_amount;
    }

    public void setTotal_amount(String total_amount) {
        this.total_amount = total_amount;
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public String getTimeout_express() {
        return timeout_express;
    }

    public void setTimeout_express(String timeout_express) {
        this.timeout_express = timeout_express;
    }

    public String getProduct_code() {
        return product_code;
    }

    public void setProduct_code(String product_code) {
        this.product_code = product_code;
    }
}

alipayConfig类

package cn.edu.guet.config;

import java.io.FileWriter;
import java.io.IOException;
/**
 * @author George
 * @project DormitorySystem
 * @package cn.edu.guet.config
 * @date 2021/7/22 13:16
 * @since 1.0
 */

public class AlipayConfig {

//↓↓↓↓↓↓↓↓↓↓请在这里配置您的基本信息↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓

    // 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 = "2021000117643373";
    // 商户私钥，您的PKCS8格式RSA2私钥
    public static String merchant_private_key = "";
    // 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 = "";
    // 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 = "http://localhost:8082";
    // 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 = "http://localhost:8082";
    // 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
    public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";
    // 支付宝网关
    public static String log_path = "C:\\";

//↑↑↑↑↑↑↑↑↑↑请在这里配置您的基本信息↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

    /**
     * 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();
                }
            }
        }
    }
}

controller控制器

支付

@Controller
public class AlipayController {

    @RequestMapping("/pay")
    @ResponseBody
    public void payController(HttpServletRequest request, HttpServletResponse response) throws IOException, AlipayApiException {
        // 获取初始化的AliPayClient
        AlipayClient alipayClient = new DefaultAlipayClient(
                AlipayConfig.gatewayUrl,
                AlipayConfig.app_id,
                AlipayConfig.merchant_private_key,
                "json",
                AlipayConfig.charset,
                AlipayConfig.alipay_public_key,
                AlipayConfig.sign_type);
        // 设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = new String(request.getParameter("WIDout_trade_no").getBytes("ISO-8859-1"),"UTF-8");
        //付款金额，必填
        String total_amount = new String(request.getParameter("WIDtotal_amount").getBytes("ISO-8859-1"),"UTF-8");
        //订单名称，必填
        String subject = new String(request.getParameter("WIDsubject").getBytes("ISO-8859-1"),"UTF-8");
        //商品描述，可空
        String body = new String(request.getParameter("WIDbody").getBytes("ISO-8859-1"),"UTF-8");
        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求
        String result = alipayClient.pageExecute(alipayRequest).getBody();

        //输出
        response.setContentType("text/html;charset="+AlipayConfig.charset);
        response.getWriter().write(result);
        response.getWriter().flush();
        response.getWriter().close();
    }
}