生成微信支付二维码接口

1.准备微信支付需要材料

weixin:
pay:
#关联的公众号appid
appid: wx74862e0dfcf69954
#商户号
partner: 1558950191
#商户key
partnerkey: T6m9iK73b0kn9g5v426MKfHQH7X8rKwb
#回调地址
notifyurl: http://guli.shop/api/order/weixinPay/weixinNotify

 2.导入依赖

      <dependency
            <groupId>com.github.wxpay</groupId>
            <artifactId>wxpay-sdk</artifactId>
            <version>0.0.3</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
        </dependency>

 

3.创建生成二维码接口

@PostMapping("/createNative/{orderNo}")
public R createNative(@PathVariable String orderNo){
    Map map=payLogService.createNative(orderNo);
    return R.ok().data(map);
}

 

4.实现接口

@Override
    public Map createNative(String orderNo) {
        try {
            //1.根据订单号查订单信息
            QueryWrapper<Order> wrapper = new QueryWrapper<>();
            wrapper.eq("order_no", orderNo);
            Order order = orderService.getOne(wrapper);
            //2.设置生二维码所需要的参数中
            Map m = new HashMap();
            m.put("appid", "wx74862e0dfcf69954");
            m.put("mch_id", "1558950191");
            m.put("nonce_str", WXPayUtil.generateNonceStr());
            m.put("body", order.getCourseTitle());//课程标题
            m.put("out_trade_no", orderNo);//订单号
            m.put("total_fee", order.getTotalFee().multiply(new BigDecimal("100")).longValue() + "");
            m.put("spbill_create_ip", "127.0.0.1");
            m.put("notify_url", "http://guli.shop/api/order/weixinPay/weixinNotify\n");
            m.put("trade_type", "NATIVE");
            //3、HTTPClient来根据URL访问第三方接口并且传递参数
            HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/unifiedorder");
            client.setXmlParam(WXPayUtil.generateSignedXml(m, "T6m9iK73b0kn9g5v426MKfHQH7X8rKwb"));
            client.setHttps(true);
            //执行发送请求
            client.post();
            //4.得到请求返回结果,是xml类型，需要转换为map
            String content = client.getContent();
            Map<String, String> resultMap = WXPayUtil.xmlToMap(content);
            Map map = new HashMap<>();
            map.put("out_trade_no", orderNo);
            map.put("course_id", order.getCourseId());

            map.put("total_fee", order.getTotalFee());

            map.put("result_code", resultMap.get("result_code"));

            map.put("code_url", resultMap.get("code_url"));
            return map;

        } catch (Exception e) {
            throw new WangException(20001, "生成二维码异常");
        }


    }

 

 

5.service层需要的将map转化为xml的工具类

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.util.EntityUtils;

import javax.net.ssl.SSLContext;
import java.io.IOException;
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
 *
 * 
 */
public class HttpClient {
   private String url;
   private Map<String, String> param;
   private int statusCode;
   private String content;
   private String xmlParam;
   private boolean isHttps;

   public boolean isHttps() {
      return isHttps;
   }

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

   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 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) {
            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;
   }

}
 

 

6.查询支付状态接口

//查询订单支付状态
    //参数：订单号，根据订单号查询 支付状态
    @GetMapping("queryPayStatus/{orderNo}")
    public R queryPayStatus(@PathVariable String orderNo) {
        Map<String,String> map = payLogService.queryPayStatus(orderNo);
        System.out.println("*****查询订单状态map集合:"+map);
        if(map == null) {
            return R.error().message("支付出错了");
        }
        //如果返回map里面不为空，通过map获取订单状态
        if(map.get("trade_state").equals("SUCCESS")) {//支付成功
            //添加记录到支付表，更新订单表订单状态
            payLogService.updateOrdersStatus(map);
            return R.ok().message("支付成功");
        }
        return R.ok().code(25000).message("支付中");

    }

7.实现查询订单接口

@Override
    public Map<String, String> queryPayStatus(String orderNo) {
        try {
            //1、封装参数
            Map m = new HashMap<>();
            m.put("appid", "wx74862e0dfcf69954");
            m.put("mch_id", "1558950191");
            m.put("out_trade_no", orderNo);
            m.put("nonce_str", WXPayUtil.generateNonceStr());

            //2 发送httpclient
            HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/pay/orderquery");
            client.setXmlParam(WXPayUtil.generateSignedXml(m,"T6m9iK73b0kn9g5v426MKfHQH7X8rKwb"));
            client.setHttps(true);
            client.post();

            //3 得到请求返回内容
            String xml = client.getContent();
            Map<String, String> resultMap = WXPayUtil.xmlToMap(xml);
            //6、转成Map再返回
            return resultMap;
        }catch(Exception e) {
            return null;
        }

    }

 

8.更新订单实现类

 @Override
    public void updateOrdersStatus(Map<String, String> map) {
//从map获取订单号
        String orderNo = map.get("out_trade_no");
        //根据订单号查询订单信息
        QueryWrapper<Order> wrapper = new QueryWrapper<>();
        wrapper.eq("order_no",orderNo);
        Order order = orderService.getOne(wrapper);

        //更新订单表订单状态
        if(order.getStatus().intValue() == 1) { return; }
        order.setStatus(1);//1代表已经支付
        orderService.updateById(order);

        //向支付表添加支付记录
        PayLog payLog = new PayLog();
        payLog.setOrderNo(orderNo);  //订单号
        payLog.setPayTime(new Date()); //订单完成时间
        payLog.setPayType(1);//支付类型 1微信
        payLog.setTotalFee(order.getTotalFee());//总金额(分)

        payLog.setTradeState(map.get("trade_state"));//支付状态
        payLog.setTransactionId(map.get("transaction_id")); //流水号
        payLog.setAttr(JSONObject.toJSONString(map));

        baseMapper.insert(payLog);



    }