@RequestMapping("/ceshi")
public String ceshi() throws IOException {
    CloseableHttpClient httpClient = HttpClients.createDefault();

    //请求URL
    HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/pay/transactions/app");
    // 请求body参数
    String reqdata = "{"
            + "\"time_expire\":\"2018-06-08T10:34:56+08:00\","
            + "\"amount\": {"
            + "\"total\":1,"
            + "\"currency\":\"CNY\""
            + "},"
            + "\"mchid\":\"56168498\","
            + "\"description\":\"Image形象店-深圳腾大-QQ公仔\","
            + "\"notify_url\":\"https://www.weixin.qq.com/wxpay/pay.php\","
            + "\"out_trade_no\":\"1217752501201407033233368018\","
            + "\"goods_tag\":\"WXG\","
            + "\"appid\":\"dwdawdqwdaxcw\","
            + "\"attach\":\"韩测试微信下单\","
            + "\"detail\": {"
            + "\"invoice_id\":\"wx123\","
            + "\"goods_detail\": ["
            + "{"
            + "\"goods_name\":\"iPhoneX 256G\","
            + "\"wechatpay_goods_id\":\"1001\","
            + "\"quantity\":1,"
            + "\"merchant_goods_id\":\"123456123\","
            + "\"unit_price\":828800"
            + "},"
            + "{"
            + "\"goods_name\":\"iPhoneX 256G\","
            + "\"wechatpay_goods_id\":\"1001\","
            + "\"quantity\":1,"
            + "\"merchant_goods_id\":\"100025545\","
            + "\"unit_price\":828800"
            + "}"
            + "],"
            + "\"cost_price\":608800"
            + "},"
            + "\"scene_info\": {"
            + "\"store_info\": {"
            + "\"address\":\"广东省深圳市南山区科技中一道10000号\","
            + "\"area_code\":\"440305\","
            + "\"name\":\"腾讯大厦分店\","
            + "\"id\":\"0001\""
            + "},"
            + "\"device_id\":\"013467007045764\","
            + "\"payer_client_ip\":\"14.23.150.211\""
            + "}"
            + "}";
    StringEntity entity = new StringEntity(reqdata,"utf-8");
    entity.setContentType("application/json");
    httpPost.setEntity(entity);
    httpPost.setHeader("Accept", "application/json");

    //完成签名并执行请求
    CloseableHttpResponse response = httpClient.execute(httpPost);

    try {
        int statusCode = response.getStatusLine().getStatusCode();
        if (statusCode == 200) { //处理成功
            System.out.println("success,return body = " + EntityUtils.toString(response.getEntity()));
        } else if (statusCode == 204) { //处理成功，无返回Body
            System.out.println("success");
        } else {
            System.out.println("failed,resp code = " + statusCode+ ",return body = " + EntityUtils.toString(response.getEntity()));
            throw new IOException("request failed");
        }
    } finally {
        response.close();
    }
    return EntityUtils.toString(response.getEntity());
}

这是代码 (有一些隐私东西不方便查看如商户号之类的)

一直报这个错是怎么回事