【微信小程序】企业付款接口

参考网上博客：https://blog.csdn.net/shaomiaojava/article/details/50562550

import java.io.*;
import java.math.BigDecimal;
import java.security.KeyStore;
import java.util.Map;
import java.util.UUID;

import javax.net.ssl.SSLContext;

import com.dingyi.common.base.CommonConstant;
import com.dingyi.common.model.member.PlatformWeixinCheckTransfer;
import com.dingyi.common.model.member.PlatformWeixinMoneyRecord;
import com.dingyi.common.model.member.PlatformWeixinTransfer;
import com.dingyi.common.util.MD5Util;
import com.dingyi.common.util.XMLUtil;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Component;

@Component
public class RedPacketUtil {
    @Value("${weixin.mch_appid}")
    private String APPID;
    @Value("${weixin.mchid}")
    private String partnerId; //商户号
    @Value("${weixin.mchkey}")
    private String partnerKey; //支付key

    @Autowired
    private XMLUtil xmlUtil;

    @Autowired
    private AlipayUtil alipayUtil;


    /*进行付款*/
    public Map sendRed(PlatformWeixinMoneyRecord record) {
        PlatformWeixinTransfer transfers = new PlatformWeixinTransfer();

        //把以元为单位的金额改成以分为单位
        BigDecimal total = record.getAmount();
        int amount = total.multiply(new BigDecimal("100")).intValue();


        String nonce = UUID.randomUUID().toString().substring(0, 30);
        String partnerTradeNo = alipayUtil.getTradeNo(CommonConstant.WEIXIN_REDPACKET);//生成唯一订单号，可以用随机数+时间戳替代


        transfers.setMch_appid(APPID);// 自己的公众账号
        transfers.setMchid(partnerId);//自己的 商户号
        transfers.setNonce_str(nonce);// 随机字符串
        transfers.setOpenid(record.getOpenid());// 用户openId
        transfers.setCheck_name("NO_CHECK");// 校验用户姓名选项
        transfers.setAmount(amount);// 付款金额
        transfers.setDesc(record.getDesc());// 企业付款描述信息
        transfers.setSpbill_create_ip("116.62.61.25");// 调用接口的机器Ip地址
        transfers.setPartner_trade_no(partnerTradeNo);// 商户订单号
        String sign = createSendRedPackOrderSign(transfers);
        transfers.setSign(sign);// 签名

        xmlUtil.xstream().alias("xml", transfers.getClass());
        String xml = xmlUtil.xstream().toXML(transfers);

        String sendEedPackUrl = "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers";
        String response = ssl(sendEedPackUrl, xml);

        Map responseMap = null;
        try {
            responseMap = xmlUtil.parseXml(response);
        } catch (Exception e) {

            e.printStackTrace();
        }


        String return_msg = responseMap.get("return_msg");
        System.out.println(return_msg);


        return  responseMap;
    }


   /* 查询付款结果*/
    public Map checkSuccess(PlatformWeixinMoneyRecord record) {
        PlatformWeixinCheckTransfer checkTransfer = new PlatformWeixinCheckTransfer();

        String nonce = UUID.randomUUID().toString().substring(0, 30);
        checkTransfer.setAppid(APPID);// 自己的公众账号
        checkTransfer.setMch_id(partnerId);//自己的 商户号
        checkTransfer.setNonce_str(nonce);// 随机字符串
        checkTransfer.setPartner_trade_no(record.getPartnerTradeNo());// 商户订单号
        String sign = createCheckOrderSign(checkTransfer);
        checkTransfer.setSign(sign);// 签名

        xmlUtil.xstream().alias("xml", checkTransfer.getClass());
        String xml = xmlUtil.xstream().toXML(checkTransfer);
        System.out.println(xml);

        String sendEedPackUrl = "https://api.mch.weixin.qq.com/mmpaymkttransfers/gettransferinfo";
        String response = ssl(sendEedPackUrl, xml);

        Map responseMap = null;
        try {
            responseMap = xmlUtil.parseXml(response);
        } catch (Exception e) {

            e.printStackTrace();
        }


        String return_msg = responseMap.get("return_msg");
        System.out.println(return_msg);


        return  responseMap;
    }

    /*查询付款结果的签名*/
    private String createCheckOrderSign(PlatformWeixinCheckTransfer checkTransfer) {
        StringBuffer sign = new StringBuffer();
        sign.append("appid=").append(checkTransfer.getAppid());
        sign.append("&mch_id=").append(checkTransfer.getMch_id());
        sign.append("&nonce_str=").append(checkTransfer.getNonce_str());
        sign.append("&partner_trade_no=").append(checkTransfer.getPartner_trade_no());
        sign.append("&key=").append(partnerKey);

        System.out.println(sign.toString());
        return   MD5Util.MD5Encode(sign.toString(), null).toUpperCase();
    }


    /*付款的签名*/
    public String createSendRedPackOrderSign(PlatformWeixinTransfer transfers){

        StringBuffer sign = new StringBuffer();
        sign.append("amount=").append(transfers.getAmount());
        sign.append("&check_name=").append(transfers.getCheck_name());
        sign.append("&desc=").append(transfers.getDesc());
        sign.append("&mch_appid=").append(transfers.getMch_appid());
        sign.append("&mchid=").append(transfers.getMchid());
        sign.append("&nonce_str=").append(transfers.getNonce_str());
        sign.append("&openid=").append(transfers.getOpenid());
        sign.append("&partner_trade_no=").append(transfers.getPartner_trade_no());
        sign.append("&spbill_create_ip=").append(transfers.getSpbill_create_ip());
        sign.append("&key=").append(partnerKey);

        System.out.println(sign.toString());

        return   MD5Util.MD5Encode(sign.toString(), null).toUpperCase();
    }



    private String ssl(String url,String data){
        StringBuffer message = new StringBuffer();
        try {
            KeyStore keyStore  = KeyStore.getInstance("PKCS12");
            ClassPathResource classPathResource = new ClassPathResource("apiclient_cert.p12");
            InputStream instream = classPathResource.getInputStream();
            keyStore.load(instream, partnerId.toCharArray());
            // Trust own CA and all self-signed certs
            SSLContext sslcontext = SSLContexts.custom()
                    .loadKeyMaterial(keyStore, partnerId.toCharArray())
                    .build();
            // Allow TLSv1 protocol only
            SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(
                    sslcontext,
                    new String[] { "TLSv1" },
                    null,
                    SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
            CloseableHttpClient httpclient = HttpClients.custom()
                    .setSSLSocketFactory(sslsf)
                    .build();
            HttpPost httpost = new HttpPost(url);

            httpost.addHeader("Connection", "keep-alive");
            httpost.addHeader("Accept", "*/*");
            httpost.addHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
            httpost.addHeader("Host", "api.mch.weixin.qq.com");
            httpost.addHeader("X-Requested-With", "XMLHttpRequest");
            httpost.addHeader("Cache-Control", "max-age=0");
            httpost.addHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0) ");
            httpost.setEntity(new StringEntity(data, "UTF-8"));
            //System.out.println("executing request" + httpost.getRequestLine());

            CloseableHttpResponse response = httpclient.execute(httpost);
            try {
                HttpEntity entity = response.getEntity();

                //System.out.println("----------------------------------------");
                //System.out.println(response.getStatusLine());
                if (entity != null) {
                    //System.out.println("Response content length: " + entity.getContentLength());
                    BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent(),"UTF-8"));
                    String text;
                    while ((text = bufferedReader.readLine()) != null) {
                        message.append(text);
                    }
                }
                EntityUtils.consume(entity);
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                response.close();
            }
        } catch (Exception e1) {
            e1.printStackTrace();
        }

        return message.toString();
    }

}

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.springframework.stereotype.Component;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.core.util.QuickWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.naming.NoNameCoder;
import com.thoughtworks.xstream.io.xml.DomDriver;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.XmlFriendlyNameCoder;
import com.thoughtworks.xstream.io.xml.XppDriver;

/**
 * XML工具包
 *
 * XMLUtil
 *
 * @author zdl
 * @version 1.0.0
 *
 */
@Component
public class XMLUtil {

    /**
     * 解析字符串（XML）
     *
     * @return
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public Map parseXml(String msg) throws Exception {
        // 将解析结果存储在HashMap中
        Map map = new HashMap();

        // 从request中取得输入流
        InputStream inputStream = new ByteArrayInputStream(
                msg.getBytes("UTF-8"));

        // 读取输入流
        SAXReader reader = new SAXReader();
        Document document = reader.read(inputStream);
        // 得到xml根元素
        Element root = document.getRootElement();
        // 得到根元素的所有子节点
        List elementList = root.elements();

        // 遍历所有子节点
        for (Element e : elementList)
            map.put(e.getName(), e.getText());

        // 释放资源
        inputStream.close();
        inputStream = null;

        return map;
    }

    /**
     * 扩展xstream，使其支持CDATA块
     */
    private XStream xstream = new XStream(new XppDriver(new NoNameCoder()) {

        @Override
        public HierarchicalStreamWriter createWriter(Writer out) {
            return new PrettyPrintWriter(out) {
                // 对所有xml节点的转换都增加CDATA标记
                boolean cdata = true;

                @Override
                @SuppressWarnings("rawtypes")
                public void startNode(String name, Class clazz) {
                    super.startNode(name, clazz);
                }

                @Override
                public String encodeNode(String name) {
                    return name;
                }

                @Override
                protected void writeText(QuickWriter writer, String text) {
                    if (cdata) {
                        writer.write(");
                        writer.write(text);
                        writer.write("]]>");
                    } else {
                        writer.write(text);
                    }
                }
            };
        }
    });

    private XStream inclueUnderlineXstream = new XStream(new DomDriver(null,
            new XmlFriendlyNameCoder("_-", "_")));

    public XStream getXstreamInclueUnderline() {
        return inclueUnderlineXstream;
    }

    public XStream xstream() {
        return xstream;
    }

}

注意事项:

1. 小程序需要开通微信支付，此处appid既为小程序appid。

2.商户号，是商户平台中的商户号。在小程序开通微信支付的时候，这些信息会被以邮件的形式发送给用户

3.支付key和安全证书（“apiclient_cert.p12”）都是在商户平台-账户中心-API安全 中设置和获取