Zoho Rest发票API返回400错误，Java HttpClient

我想在我的Spring应用程序中集成Zoho发票API。我已成功集成了

AuthToken

部分。现在我正在使用createcontactapi。但API返回一个错误400

我正在使用以下代码：

public String processZohoRequest(String apiUrl,Map<String, String> params,String method, String auth) throws UnsupportedEncodingException, IOException {
    URL url = new URL(apiUrl);
    HttpURLConnection con = (HttpURLConnection) url.openConnection();
    con.setRequestMethod(method);

    if(!AppUtility.isEmpty(auth)) {
        con.setRequestProperty("Authorization", auth);
        con.setRequestProperty("Content-Type", "multipart/form-data");
        con.setRequestProperty("X-com-zoho-invoice-organizationid", testZohoOrgId);
    }

    if(!AppUtility.isEmpty(params)) {
        con.setDoOutput(true);
        DataOutputStream out = new DataOutputStream(con.getOutputStream());
        out.writeBytes(ParameterStringBuilder.getParamsString(params));
        out.flush();
        out.close();
    }
    BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer content = new StringBuffer();
    while ((inputLine = in.readLine()) != null) {
        content.append(inputLine);
    }
    in.close();
    con.disconnect();

    return content.toString();
}

json字符串

：“{”联系人姓名“：\”Jay Panjwanai\“，”公司名称“：”Ozone\“，”账单地址“：{”注意“：”Jay\“，”地址“：“$”，”城市“：”INDORE\“，”国家“：”印度“，”电话“：9XXXXXXXXXXXXX\”，”航运地址“：{”注意“：”Jay\“，”地址“，”地址“：”INDORE\”，”国家“，”印度“，”国家“，”地址“，”INDORE\”电话\“：9xxxxxxxxx}}”

---

提前谢谢

与他们的支持团队讨论后，我得到了答案。只需删除以下行：

con.setRequestProperty("Content-Type", "multipart/form-data");

这造成了一个问题

问候

con.setRequestProperty("Content-Type", "multipart/form-data");