支付宝支付--新手快速入手（十分钟上手）

》》》本项目是集成与spring项目 一定要了解spring之后再搞《《《

支付宝支付其实可以分为三个步骤

https://open.alipay.com/platform/appDaily.htm

 点此查看公钥私钥 （一会开发要用）

新建一个spring boot web项目  然后在pom里导入：

        
            com.alipay.sdk
            alipay-sdk-java
            3.3.49.ALL
        

创建一个 Controller java文件

然后直接上代码：

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Random;
import java.util.UUID;

@Controller
public class PayController {

    //APP_ID   》》》》》要填《《《《《《《
    private final String APP_ID = "";


    //私钥   》》》》》》》》》要填《《《《《《《《
    private final String APP_PRIVATE_KEY = "";
    private final String CHARSET = "UTF-8";

    //公钥   》》》》》》》》》要填《《《《《《《《
    private final String ALIPAY_PUBLIC_KEY = "";
    //这是沙箱接口路径,正式路径为https://openapi.alipay.com/gateway.do
    private final String GATEWAY_URL ="https://openapi.alipaydev.com/gateway.do";
    private final String FORMAT = "JSON";
    //签名方式
    private final String SIGN_TYPE = "RSA2";
    //支付宝异步通知路径,付款完毕后会异步调用本项目的方法,必须为公网地址
    private final String NOTIFY_URL = "http://公网地址/notifyUrl";
    //支付宝同步通知路径,也就是当付款完毕后跳转本项目的页面,可以不是公网地址
    private final String RETURN_URL = "http://公网地址/returnUrl";


    @RequestMapping("/alipay")
    public void alipay(HttpServletResponse httpResponse) throws IOException {

        Random r=new Random();
        //实例化客户端,填入所需参数
        AlipayClient alipayClient = new DefaultAlipayClient(GATEWAY_URL, APP_ID, APP_PRIVATE_KEY, FORMAT, CHARSET, ALIPAY_PUBLIC_KEY, SIGN_TYPE);
        AlipayTradePagePayRequest request = new AlipayTradePagePayRequest();
        //在公共参数中设置回跳和通知地址
        request.setReturnUrl(RETURN_URL);
        request.setNotifyUrl(NOTIFY_URL);

        //商户订单号，商户网站订单系统中唯一订单号，必填
        //生成随机Id
        String out_trade_no = UUID.randomUUID().toString();
        //付款金额，必填
//        String total_amount =Integer.toString(r.nextInt(9999999)+1000000);
        String total_amount = Double.toString(0.1);
        //订单名称，必填
        String subject ="奥迪A6 2021款";
        //商品描述，可空
        String body = "尊敬的会员欢迎购买奥迪A6 2021款 A8L 60 TFSl quattro豪华型";
        request.setBizContent("{"out_trade_no":""+ out_trade_no +"","
                + ""total_amount":""+ total_amount +"","
                + ""subject":""+ subject +"","
                + ""body":""+ body +"","
                + ""product_code":"FAST_INSTANT_TRADE_PAY"}");
        String form = "";
        try {
            form = alipayClient.pageExecute(request).getBody(); // 调用SDK生成表单
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        httpResponse.setContentType("text/html;charset=" + CHARSET);
        httpResponse.getWriter().write(form);// 直接将完整的表单html输出到页面
        httpResponse.getWriter().flush();
        httpResponse.getWriter().close();
    }

}

然后用浏览器访问 /alipay 这个路径就行了，是不是非常的古德奈丝啊！！！

注释：本项目是新手测试用的，所以生成的二维码扫码之后会显示“二维码已过期”，想要正式版的要用营业执照之类的去官方申请支付宝公钥。