java开发微信公众号企业付款开发

详情参照微信开发者文档 企业付款文档
https://pay.weixin.qq.com/wiki/doc/api/mch_pay.php?chapter=14_2

java代码 定义所传递的参数

 @RequestMapping(value = "zhifu", method = RequestMethod.GET)
    public @ResponseBody String getWeixinOpenid(String code,
            HttpServletRequest request)
    {
        // 订单号 自定义 生成32位uuid
        String partner_trade_no = UUIDGenerator.getUUID();
        // 随机数
        String nonce_str = UUIDGenerator.getUUID();
        // 转账金额(分为单位)1-200
        int jine = 100;
        // 企业付款信息
        String desc = "转账";
        // ip地址
        String spbill_create_ip = "xx.xx.xx";
        // re_user_name
        String re_user_name = "xx";

        String check_name = CheckName.NO_CHECK.toString();
        String zfpath = "D:/apiclient_cert.p12";
        try
        {
            // 获取openid
            String openid = WeChatUtil.getByOpenid(appid, secret, code);
            // 付款
            boolean flag = WeChatUtil.enterprisePayment(openid, appid, mchid,
                    nonce_str, partner_trade_no, re_user_name, jine, desc,
                    spbill_create_ip, check_name, key, zfpath);
            // 成功
            if (flag)
            {
                return "SUCCESS";
            }

        }
        catch (Exception e)
        {
            System.err.println(e.getStackTrace());
        }
        return "FAIL";
    }

---

获取关注本公众号用户唯一标示 获取openid
java代码 获取openid 静态方法

/**
     * 获取openid
     * 
     * @description
     * @param appid
     * @param secret
     * @param code
     * @return
     * @author shaomiao
     */
    public static String getByOpenid(String appid, String secret, String code)
    {
        String url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid="
                + appid + "&secret=" + secret + "&code=" + code
                + "&grant_type=authorization_code";
        String jsonstring = WeChatUtil.getJsonString(url);
        JSONObject json1 = JSONObject.parseObject(jsonstring);
        String openid = json1.get("openid").toString();
        return openid;

    }

企业付款的调用公共方法
java代码
post提交 xml参数
解析回调的xml

 /**
     * 企业付款
     * 
     * @description
     * @param openid
     * @param appid
     * @param mchid 商户id
     * @param nonce_str
     * @param partner_trade_no
     * @param re_user_name
     * @param jine
     * @param desc
     * @param spbill_create_ip
     * @param check_name
     * @return
     * @author Jobs
     * @throws IOException
     * @throws ClientProtocolException
     */
    public static boolean enterprisePayment(String openid, String appid,
            String mchid, String nonce_str, String partner_trade_no,
            String re_user_name, int jine, String desc, String spbill_create_ip,
            String check_name, String key, String zfpath) throws Exception
    {
        boolean getSuccess = true;
        if (null != openid)
        {
            // zf
            Map<String, String> params_map = new LinkedHashMap<String, String>();
            StringBuffer param = new StringBuffer();
            // appid
            param.append("mch_appid=" + appid);
            // 商户id
            param.append("&mchid=" + mchid);
            // 随机字符串
            // param.append("&nonce_str="
            // + ZifwUtil.string2MD5(new Date().getTime() + ""));
            param.append("&nonce_str=" + nonce_str);
            // 订单号自定义
            param.append("&partner_trade_no=" + partner_trade_no);

            param.append("&openid=" + openid);
            // 校验用户姓名选项
            /**
             * NO_CHECK：不校验真实姓名
             * FORCE_CHECK：强校验真实姓名（未实名认证的用户会校验失败，无法转账）
             * OPTION_CHECK：针对已实名认证的用户才校验真实姓名（未实名认证用户不校验，可以转账成功）
             */
            param.append("&check_name=" + check_name);
            // 收款用户姓名
            param.append("&re_user_name=" + re_user_name);
            // 金额
            param.append("&amount=" + jine);
            // 企业付款描述信息
            param.append("&desc=" + desc);
            // Ip地址
            param.append("&spbill_create_ip=" + spbill_create_ip);

            String[] params = param.toString().split("&");
            Arrays.sort(params);
            param = new StringBuffer();
            for (String p : params)
            {
                String[] value = p.split("=");
                params_map.put(value[0], value[1]);
                param.append(value[0] + "=" + value[1] + "&");
            }

            // 签名最后
            String sign = ZifwUtil.string2MD5(param.toString() + "key=" + key)
                    .toUpperCase();
            params_map.put("sign", sign);
            String reqStr = ZifwUtil.toXml(params_map);
            // ZHENGSHU
            CloseableHttpClient httpclient = certificateValidation(zfpath,
                    mchid);

            HttpPost httppost = new HttpPost(
                    "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers");
            StringEntity myEntity = new StringEntity(reqStr, "UTF-8");
            httppost.setEntity(myEntity);
            System.out.println("executing request" + httppost.getRequestLine());

            CloseableHttpResponse response = httpclient.execute(httppost);
            System.out.println(response.getStatusLine());

            HttpEntity resEntity = response.getEntity();
            InputStreamReader reader = new InputStreamReader(
                    resEntity.getContent(), "UTF-8");
            char[] buff = new char[1024];
            int length = 0;
            StringBuffer strhuxml = new StringBuffer();
            while ((length = reader.read(buff)) != -1)
            {
                strhuxml.append(new String(buff, 0, length));
                System.out.println(new String(buff, 0, length));
            }
            // httpclient.close();
            httpclient.getConnectionManager().shutdown();

            // String ret = ZifwUtil.post(
            // "https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers",
            // reqStr);

            // 解析传过来的xml
            Document document = DocumentHelper.parseText(strhuxml.toString());
            // 得到xml根元素
            Element root = document.getRootElement();
            // 得到根元素的所有子节点
            List<Element> elementList = root.elements();
            String errors = "";
            for (Element e : elementList)
            {

                // result_code业务
                if ("return_code".equals(e.getName())
                        && !"SUCCESS".equals(e.getText()))
                {
                    getSuccess = false;
                }
                if ("result_code".equals(e.getName())
                        && !"SUCCESS".equals(e.getText()))
                {
                    getSuccess = false;
                }
            }

        }
        return getSuccess;
    }

微信签名验证证书
验证证书公共方法

 /**
     * 验证证书公共方法
     * 
     * @description
     * @param zfpath 证书的路径
     * @param mchid 商户id
     * @return
     * @throws Exception
     * @author Jobs
     */
    // shanghuid
    // 验证证书
    @SuppressWarnings("deprecation")
    public static CloseableHttpClient certificateValidation(String zfpath,
            String mchid) throws Exception
    {
        // 指定读取证书格式为PKCS12
        KeyStore keyStore = KeyStore.getInstance("PKCS12");
        // 证书地址
        FileInputStream instream = new FileInputStream(new File(zfpath));
        try
        {
            keyStore.load(instream, mchid.toCharArray());
        }
        finally
        {
            instream.close();
        }

        // Trust own CA and all self-signed certs
        SSLContext sslcontext = SSLContexts.custom()
                .loadKeyMaterial(keyStore, mchid.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();
        return httpclient;
    }

微信公共方法 字符串转xml

/**
     * 微信支付拼接xml
     * 
     * @param params
     * @return
     */
    public static String toXml(Map<String, String> params)
    {
        String xml = "<xml>";
        for (String key : params.keySet())
        {
            if ("body".equals(key) || "attach".equals(key)
                    || "sign".equals(key))
            {
                xml += "<" + key + "><![CDATA[" + params.get(key) + "]]></"
                        + key + ">";
            }
            else
            {
                xml += "<" + key + ">" + params.get(key) + "</" + key + ">";
            }
        }
        xml += "</xml>";
        return xml;
    }

微信公共方法 字符串MD5
加密
用来加密签名

/***
     * MD5加码 生成32位md5码
     */
    public static String string2MD5(String inStr)
    {
        StringBuffer buf = new StringBuffer();
        try
        {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(inStr.getBytes("utf-8"));
            byte b[] = md.digest();

            int i;

            for (int offset = 0; offset < b.length; offset++)
            {
                i = b[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        return buf.toString();
    }