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我有一個Android設備創建一個JSON格式的消息，並將其發送到Tomcat服務器。服務器正在運行一個Java Web應用程序，它接收這個JSON格式的消息，然後處理它。從Android設備發送JSON消息到服務器
我的問題是，當服務器接收到消息時，服務器用看起來像他們的十六進制表示的東西替換某些字符（'{'，'['，'''，']'和'}'） ，這會導致服務器無法識別郵件的JSON錯誤
我的問題是，是否有人知道是什麼導致了這個問題，以及我會如何解決這個問題（我確定它不是JSON代碼，而是方式的消息在被送到方面處理/接收）
這裏是我的服務器端代碼：
@Override
protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// Setup response
PrintWriter out = response.getWriter();
// Store input message as String
StringBuilder sb = new StringBuilder();
String message;
// Build String
while ((message = request.getReader().readLine()) != null) {
sb.append(message);
}
// Full message as String
message = sb.toString();
// Convert message to JSON format
Gson gson = new Gson();
ImageFeatures features = gson.fromJson(message, ImageFeatures.class);
out.println("Normal data: " + features);
out.println();
}
這裏是我接收到錯誤：
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 12
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:176)
com.google.gson.Gson.fromJson(Gson.java:795)
com.google.gson.Gson.fromJson(Gson.java:761)
com.google.gson.Gson.fromJson(Gson.java:710)
com.google.gson.Gson.fromJson(Gson.java:682)
這是的Android裝置之前產生的JSON格式的消息發送該消息到服務器：
{
"image_x_size":800,
"image_y_size":1600,
"features":
[
{"cart_x":5.0,"cart_y":124.0,"polar_angle":0.0,"polar_dist":0.0,"size":15.0},
{"cart_x":5.0,"cart_y":124.0,"polar_angle":0.0,"polar_dist":0.0,"size":15.0}
]
}
這是如何該消息被服務器看到（即，所述message字符串的內容）：
%7B+%09%22image_x_size%22%3A800%2C+%09%22image_y_size%22%3A1600%2C+%09%22features%22%3A+%09%09%5B+%09%09%09%7B%22cart_x%22%3A5.0%2C%22cart_y%22%3A124.0%2C%22polar_angle%22%3A0.0%2C%22polar_dist%22%3A0.0%2C%22size%22%3A15.0%7D%2C+%09%09%09%7B%22cart_x%22%3A5.0%2C%22cart_y%22%3A124.0%2C%22polar_angle%22%3A0.0%2C%22polar_dist%22%3A0.0%2C%22size%22%3A15.0%7D+%09%09%5D+%7D+
正如你可以看到，該消息字符串具有各種十六進制值來替換某些字符。
很多感謝提前！
編輯：我想我應該有我的Android代碼，進一步明晰
HttpClient http_client = new DefaultHttpClient();
// Set long timeout limit
HttpConnectionParams.setConnectionTimeout(http_client.getParams(), 10000);
HttpConnectionParams.setSoTimeout(http_client.getParams(), 10000);
HttpResponse response;
// Setup json_object
JSONObject json_object = convertImageFeaturesToJSON(data, x, y);
try {
HttpPost http_post = new HttpPost(URL_BASE + "/featureuploader");
Log.i(TAG, json_object.toString());
StringEntity se = new StringEntity(json_object.toString());
se.setContentType("application/json; charset=UTF-8");
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json; charset=UTF-8"));
http_post.setEntity(se);
http_post.setHeader("Accept", "application/json");
http_post.setHeader("Content-Type", "application/json");
response = http_client.execute(http_post);
if (response != null) {
String response_string = httpResponseToString(response.getEntity().getContent());
if (! response_string.startsWith("Received: <html>")) {
Log.i(TAG, "Received: ERROR! - " + response_string.substring(0, 20));
} else {
Log.i(TAG, "Received: " + response_string);
}
} else {
Log.e(TAG, "Did not receive from server");
}
} catch (Exception e) {
Log.e(TAG, "Error: " + e.getMessage());
}