如何在Java，Android上對我的Web服務進行POST查詢？

Question

我在Java上有用於POST查詢的代碼

    ArrayList<HashMap<String, String>> books=SQLiteDbWrapper.getInstance().getAllBooks();
    JSONObject object=new JSONObject();
    object.put("key", KEY);

    JSONArray isbns=new JSONArray();
    for (HashMap<String, String> book:books) {
        isbns.put(book.get(SQLiteDbHelper.ISBN13_FIELD));
    }

    object.put("isbns", isbns);
    object.put("email", email);
    Log.e("log", object.toString());
    HttpClient client = new DefaultHttpClient();
    HttpPost request = new HttpPost(BASE_URL+SUBMIT_SCRIPT);

    request.setEntity(new ByteArrayEntity(
        object.toString().getBytes("UTF8")));
    HttpResponse response = client.execute(request);

我需要將JSON數據發送到服務器； 我的Web服務必須從$ POST ['json']變量中獲取此數據，但是我不知道如何將JSONObject對象放入POST查詢的'json'字段中？ 請幫我

Answer 1

您必須執行以下操作：

String jsonValue = object.toString();
String encoded = java.net.URLEncoder.encode(jsonValue, "UTF-8");

List<NameValuePair> formData = new ArrayList<NameValuePair>();
formData.add(new NameValuePair("json", encoded));

request.setHeader("Content-Type", "application/x-www-form-urlencoded");
request.setRequestBody(formData);

response = client.execute(request);

Answer 2

您的代碼看起來不錯。 我所看到的只是HttpPost對象中缺少的內容類型。

request.setHeader("Content-Type", "application/json");