喜羊羊sk

【SpringBoot应用篇】接入微信支付

接入微信支付

微信支付介绍
- 微信扫码支付申请
- 开发文档
- 微信支付SDK
微信支付开发
- 依赖
- 添加配置
- 工具类
- 显示二维码
- 支付查询
- 微信退款

学习尚医通项目做的笔记

微信支付介绍

微信扫码支付申请

微信扫码支付是商户系统按微信支付协议生成支付二维码，用户再用微信“扫一扫”完成支付的模式。该模式适用于PC网站支付、实体店单品或订单支付、媒体广告支付等场景。
申请步骤：

注册公众号（类型须为：服务号）
认证公众号
提交资料申请微信支付
开户成功，登录商户平台进行验证
在线签署协议

开发文档

微信支付接口调用的整体思路：按API要求组装参数，以XML方式发送（POST）给微信支付接口（URL）,微信支付接口也是以XML方式给予响应。程序根据返回的结果（其中包括支付URL）生成二维码或判断订单状态。
在线微信支付开发文档：
https://pay.weixin.qq.com/wiki/doc/api/index.html

appid：微信公众账号或开放平台APP的唯一标识
mch_id：商户号 (配置文件中的partner)
partnerkey：商户密钥
sign:数字签名, 根据微信官方提供的密钥和一套算法生成的一个加密信息, 就是为了保证交易的安全性

微信支付SDK

添加依赖

<dependency>
	<groupId>com.github.wxpaygroupId>
	<artifactId>wxpay-sdkartifactId>
	<version>0.0.3version>
dependency>

我们主要会用到微信支付SDK的以下功能：
1.获取随机字符串

WXPayUtil.generateNonceStr()

2.MAP转换为XML字符串（自动添加签名）

 WXPayUtil.generateSignedXml(param, partnerkey)

3.XML字符串转换为MAP

WXPayUtil.xmlToMap(result)

微信支付开发

开发模式：
模式一：商户在后台给你生成二维码，用户打开扫一扫
模式二：商户后台系统调用微信支付【统一下单API】生成预付交易，将接口返回的链接生成二维码，用户扫码后输入密码完成支付交易。注意：该模式的预付单有效期为2小时，过期后无法支付。

依赖


<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-webartifactId>
dependency>

<dependency>
    <groupId>com.github.wxpaygroupId>
    <artifactId>wxpay-sdkartifactId>
    <version>0.0.3version>
dependency>

<dependency>
    <groupId>org.apache.httpcomponentsgroupId>
    <artifactId>httpclientartifactId>
dependency>

<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-thymeleafartifactId>
dependency>

添加配置

在application.properties中添加商户信息

#rabbitmq地址
spring.rabbitmq.host=192.168.158.128
spring.rabbitmq.port=5672
spring.rabbitmq.username=user
spring.rabbitmq.password=password

spring.redis.host=192.168.158.128
spring.redis.port=6379
spring.redis.database= 0
spring.redis.timeout=1800000
spring.redis.lettuce.pool.max-active=20
spring.redis.lettuce.pool.max-wait=-1
#最大阻塞等待时间(负数表示没限制)
spring.redis.lettuce.pool.max-idle=5
spring.redis.lettuce.pool.min-idle=0

#关联的公众号appid
weixin.appid=xxxxxxx
#商户号
weixin.partner=xxxxxxxx
#商户key
weixin.partnerkey=xxxxxxxxx

工具类

@Component
public class ConstantPropertiesUtils implements InitializingBean {
    
    @Value("${weixin.appid}")
    private String appid;

    @Value("${weixin.partner}")
    private String partner;

    @Value("${weixin.partnerkey}")
    private String partnerkey;

    public static String APPID;
    public static String PARTNER;
    public static String PARTNERKEY;
    @Override
    public void afterPropertiesSet() throws Exception {
        APPID = appid;
        PARTNER = partner;
        PARTNERKEY = partnerkey;
    }
}

http请求客户端,需要调用微信接口。返回结果

import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.*;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.SSLContext;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.KeyStore;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.text.ParseException;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

/**
 * http请求客户端
 *
 * @author qy
 *
 */
public class HttpClient {

    private String url;
    private Map<String, String> param;
    private int statusCode;
    private String content;
    private String xmlParam;
    private boolean isHttps;
    private boolean isCert = false;
    //证书密码 微信商户号（mch_id）
    private String certPassword;

    public boolean isHttps() {
        return isHttps;
    }

    public void setHttps(boolean isHttps) {
        this.isHttps = isHttps;
    }

    public boolean isCert() {
        return isCert;
    }

    public void setCert(boolean cert) {
        isCert = cert;
    }

    public String getXmlParam() {
        return xmlParam;
    }

    public void setXmlParam(String xmlParam) {
        this.xmlParam = xmlParam;
    }

    public HttpClient(String url, Map<String, String> param) {
        this.url = url;
        this.param = param;
    }

    public HttpClient(String url) {
        this.url = url;
    }

    public String getCertPassword() {
        return certPassword;
    }

    public void setCertPassword(String certPassword) {
        this.certPassword = certPassword;
    }

    public void setParameter(Map<String, String> map) {
        param = map;
    }

    public void addParameter(String key, String value) {
        if (param == null)
            param = new HashMap<String, String>();
        param.put(key, value);
    }

    public void post() throws ClientProtocolException, IOException {
        HttpPost http = new HttpPost(url);
        setEntity(http);
        execute(http);
    }

    public void put() throws ClientProtocolException, IOException {
        HttpPut http = new HttpPut(url);
        setEntity(http);
        execute(http);
    }

    public void get() throws ClientProtocolException, IOException {
        if (param != null) {
            StringBuilder url = new StringBuilder(this.url);
            boolean isFirst = true;
            for (String key : param.keySet()) {
                if (isFirst)
                    url.append("?");
                else
                    url.append("&");
                url.append(key).append("=").append(param.get(key));
            }
            this.url = url.toString();
        }
        HttpGet http = new HttpGet(url);
        execute(http);
    }

    /**
     * set http post,put param
     */
    private void setEntity(HttpEntityEnclosingRequestBase http) {
        if (param != null) {
            List<NameValuePair> nvps = new LinkedList<NameValuePair>();
            for (String key : param.keySet())
                nvps.add(new BasicNameValuePair(key, param.get(key))); // 参数
            http.setEntity(new UrlEncodedFormEntity(nvps, Consts.UTF_8)); // 设置参数
        }
        if (xmlParam != null) {
            http.setEntity(new StringEntity(xmlParam, Consts.UTF_8));
        }
    }
    private void execute(HttpUriRequest http) throws ClientProtocolException,
            IOException {
        CloseableHttpClient httpClient = null;
        try {
            if (isHttps) {
                if(isCert) {
                    //TODO 需要完善
                    FileInputStream inputStream = new FileInputStream(new File(ConstantPropertiesUtils.CERT));
                    KeyStore keystore = KeyStore.getInstance("PKCS12");
                    char[] partnerId2charArray = certPassword.toCharArray();
                    keystore.load(inputStream, partnerId2charArray);
                    SSLContext sslContext = SSLContexts.custom().loadKeyMaterial(keystore, partnerId2charArray).build();
                    SSLConnectionSocketFactory sslsf =
                            new SSLConnectionSocketFactory(sslContext,
                                    new String[] { "TLSv1" },
                                    null,
                                    SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
                    httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();
                } else {
                    SSLContext sslContext = new SSLContextBuilder()
                            .loadTrustMaterial(null, new TrustStrategy() {
                                // 信任所有
                                public boolean isTrusted(X509Certificate[] chain,
                                                         String authType)
                                        throws CertificateException {
                                    return true;
                                }
                            }).build();
                    SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
                            sslContext);
                    httpClient = HttpClients.custom().setSSLSocketFactory(sslsf)
                            .build();
                }
            } else {
                httpClient = HttpClients.createDefault();
            }
            CloseableHttpResponse response = httpClient.execute(http);
            try {
                if (response != null) {
                    if (response.getStatusLine() != null)
                        statusCode = response.getStatusLine().getStatusCode();
                    HttpEntity entity = response.getEntity();
                    // 响应内容
                    content = EntityUtils.toString(entity, Consts.UTF_8);
                }
            } finally {
                response.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            httpClient.close();
        }
    }
    public int getStatusCode() {
        return statusCode;
    }
    public String getContent() throws ParseException, IOException {
        return content;
    }
}

显示二维码

核心代码

//生成微信支付二维码
@Controller
@RequestMapping("/api/wx")
public class WxController {
   /**
     * 生成订单号
     * @return
     */
    public static String getOrderNo() {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String newDate = sdf.format(new Date());
        String result = "";
        Random random = new Random();
        for (int i = 0; i < 3; i++) {
            result += random.nextInt(10);
        }
        return newDate + result;
    }
   /**
     * 元转换成分
     * @param amount
     * @return
     */
    public static String getMoney(String amount) {
        if(amount==null){
            return "";
        }
        // 金额转化为分为单位
        // 处理包含, ￥ 或者$的金额
        String currency =  amount.replaceAll("\\$|\\￥|\\,", "");
        int index = currency.indexOf(".");
        int length = currency.length();
        Long amLong = 0l;
        if(index == -1){
            amLong = Long.valueOf(currency+"00");
        }else if(length - index >= 3){
            amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));
        }else if(length - index == 2){
            amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);
        }else{
            amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");
        }
        return amLong.toString();
    }

  @GetMapping("/pay")
    public String createNative(Model model) {
        try {
            String orderNo = getOrderNo();
            String price = "1";
            //3设置参数，
            //把参数转换xml格式，使用商户key进行加密
            Map paramMap = new HashMap();
            paramMap.put("appid", ConstantPropertiesUtils.APPID);
            paramMap.put("mch_id", ConstantPropertiesUtils.PARTNER);
            paramMap.put("nonce_str", WXPayUtil.generateNonceStr());

            paramMap.put("body", "微信支付测试");//主体信息
            paramMap.put("out_trade_no",orderNo);
            //paramMap.put("total_fee", order.getAmount().multiply(new BigDecimal("100")).longValue()+"");
            paramMap.put("total_fee", price); //为了测试，统一写成这个值
            paramMap.put("spbill_create_ip", "127.0.0.1");//项目的域名
            paramMap.put("notify_url", "http://guli.shop/api/order/weixinPay/weixinNotify");//回调地址
            paramMap.put("trade_type", "NATIVE");//生成二维码的类型
            //4 调用微信生成二维码接口,httpclient调用
            HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/unifiedorder");
            //设置map参数
            //设置xml格式的参数
            //把xml格式的数据加密
            client.setXmlParam(WXPayUtil.generateSignedXml(paramMap,ConstantPropertiesUtils.PARTNERKEY));
            client.setHttps(true);
            client.post();
            //5.得到发送请求返回结果
            //返回内容，是使用xml格式返回
            String xml = client.getContent();
            //转换map集合
            Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);
            System.out.println("resultMap:"+resultMap);
            //6 封装返回结果集
            Map map = new HashMap<>();
            map.put("orderId", orderNo);
            map.put("totalFee", price);
            map.put("resultCode", resultMap.get("result_code"));
            map.put("codeUrl", resultMap.get("code_url")); //二维码地址

            ObjectMapper objectMapper = new ObjectMapper();
            String sMap = objectMapper.writeValueAsString(map);

            model.addAttribute("map",sMap);
            return "pay";
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

页面显示

DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>支付页面title>
    <script th:src="@{https://cdn.bootcdn.net/ajax/libs/qrcodejs/1.0.0/qrcode.js}">script>
    <script th:src="@{https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.js}">script>
head>

<body>
    <center>
        <div id="qrcode">div>

    center>
body>
<script th:inline="javascript">
    var results = [[${map}]];
    var parse = JSON.parse(results);
    new QRCode(document.getElementById("qrcode"), parse.codeUrl);  // 设置要生成二维码的链接
 	// 使用定时器每三秒查询一次是否支付成功
   let timer =self.setInterval("querystatus()",3000);

    function querystatus() {
        $.get(`/api/wx/queryOrder/${parse.orderId}`,function(data,status){
            if (data==="支付中"){
                console.log("支付中");
            } else {
                clearInterval(int)
                window.location.href="/api/wx/success"
            }
        })
    }
script>
html>

支付查询