英文:
JSON in java by POST getting None return
问题
以下是您要翻译的内容：
我通过以下代码请求POST方法：```try {URL url = new URL("地址/discordnotifi");HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();httpURLConnection.setReadTimeout(5000);httpURLConnection.setConnectTimeout(5000);httpURLConnection.setRequestMethod("POST");httpURLConnection.connect();JSONObject object = new JSONObject();myPWord = ((EditText) (findViewById(R.id.edit_Id))).getText().toString();object.put("token", tokens);object.put("discordid", mydiscord);OutputStream outputStream = httpURLConnection.getOutputStream();outputStream.write(object.toString().getBytes("UTF-8"));Log.d("debug",object.toString());outputStream.flush();outputStream.close();
而我的 tokens 和 mydiscord 是我想要以 JSON 格式发送的信息，就像这样：
{"token":"tokens","discordid":"mydiscord"}
从 Python Flask 的部分如下：
@app.route('/discordnotifi', methods=['POST'])def post():content = request.jsonprint(content)Discordid = int(content["discordid"])token = content['token']"""Discordid = request.form.get("discordid")token = request.form.get("token")"""print(Discordid, token)return ("谢谢")
在打印 content 时，我得到了 None，我真的不知道这里有什么问题。我原打算发送带有信息的 JSON，但我从 JSON 得到了 None。
<details><summary>英文:</summary>I request POST by this code```try {URL url = new URL("adress/discordnotifi");HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();httpURLConnection.setReadTimeout(5000);httpURLConnection.setConnectTimeout(5000);httpURLConnection.setRequestMethod("POST");httpURLConnection.connect();JSONObject object = new JSONObject();myPWord = ((EditText) (findViewById(R.id.edit_Id))).getText().toString();object.put("token", tokens);object.put("discordid", mydiscord);OutputStream outputStream = httpURLConnection.getOutputStream();outputStream.write(object.toString().getBytes("UTF-8"));Log.d("debug",object.toString());outputStream.flush();outputStream.close();
and my tokens and mydiscord is the information that I want to send as JSON format like
{"token":"tokens","discordid":"mydiscord"}
and from python flask
@app.route('/discordnotifi', methods=['POST'])def post():content = request.jsonprint(content)Discordid = int(content["discordid"])token = content['token']"""Discordid = request.form.get("discordid")token = request.form.get("token")"""print(Discordid, token)return ("Thx")
at print(content) I get None I really don't know whts wrong here. I was planning to send Json with information but I getting None from Json.
答案1
得分: 1
以下是您要翻译的内容：
你至少缺少的是在连接上启用输出。添加：
httpURLConnection.setDoOutput(true);
服务器可能还要求您设置一些标头，例如 content-type，以通知它您正在发送 JSON。
httpURLConnection.setRequestProperty("Content-Type", "application/json; utf-8");
如果您可以使用Java 11，考虑使用新的HttpClient类，而不是HttpUrlConnection。它简化了创建正确请求的过程。
英文:
The very least you're missing is enabling output on the connection. Add:
httpURLConnection.setDoOutput(true);
The server may also require that you set some headers, for example content-type to tell it that you are sending JSON.
httpURLConnection.setRequestProperty("Content-Type", "application/json; utf-8");
If you can use Java 11, consider using the new HttpClient class instead of HttpUrlConnection. It simplifies creating correct requests.
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