微信退款(旧版基于xml进行数据传输)

一.微信退款流程

通过Https请求,请求微信退款接口,携带对应的请求参数,还需要传输认证证书才能请求成功,请求证书以文件流的形式传输.Post请求

if((refundInfo.getRefundStatus().intValue() == RefundStatusEnum.REFUND.getStatus().intValue())){
            //表示已经退过款,不能继续退款
            return true;
        }
        //请求微信接口,进行退款
        Map<String,String> paramMap = new HashMap<>(8);
        paramMap.put("appid",weiXinConfig.getAppid());       //公众账号ID
        paramMap.put("mch_id",weiXinConfig.getPartner());   //商户编号
        paramMap.put("nonce_str",WXPayUtil.generateNonceStr());
        paramMap.put("transaction_id",paymentInfo.getTradeNo()); //微信订单号
        paramMap.put("out_trade_no",paymentInfo.getOutTradeNo()); //商户订单编号
        paramMap.put("out_refund_no","tk"+paymentInfo.getOutTradeNo()); //商户退款单号
        //       paramMap.put("total_fee",paymentInfoQuery.getTotalAmount().multiply(new BigDecimal("100")).longValue()+"");
        //       paramMap.put("refund_fee",paymentInfoQuery.getTotalAmount().multiply(new BigDecimal("100")).longValue()+"");
        paramMap.put("total_fee","1");
        paramMap.put("refund_fee","1");
        try {
            String paramXml = WXPayUtil.generateSignedXml(paramMap,weiXinConfig.getPartnerkey());
            HttpClient client = new HttpClient("https://api.mch.weixin.qq.com/secapi/pay/refund");
            client.setXmlParam(paramXml);
            client.setHttps(true);
            client.setCert(true);
            client.setCertPassword(weiXinConfig.getPartner());
            client.post();
            //返回第三方数据
            String content = client.getContent();
            Map<String, String> resultMap = WXPayUtil.xmlToMap(content);
            if (null != resultMap && WXPayConstants.SUCCESS.equalsIgnoreCase(resultMap.get("result_code"))) {
                //请求退款成功
                //更新退款记录表
                refundInfo.setCallbackTime(new Date());
                refundInfo.setTradeNo(resultMap.get("refund_id"));
                refundInfo.setRefundStatus(RefundStatusEnum.REFUND.getStatus());
                refundInfo.setCallbackContent(JSONObject.toJSONString(resultMap));
                refundInfoService.updateById(refundInfo);
                return true;
            }
            return false;
        } catch (Exception e) {
            e.printStackTrace();
        }

• HttpClient工具类

package com.atguigu.yygh.orders.utils;

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("D:\\java_code\\IdeaProgect\\yygh_parent\\service\\service_order\\src\\main\\resources\\cert\\apiclient_cert.p12"));
                    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;
    }
}