I have made a Java class (client) to connect with the server, my requirement is to send the JSON object to server and get the response back .
I have already a JSON object however I have no idea how to send the JSON object to the server in Java.
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what is the advantage to send it as an Object rather than just as a JSON string? What is the server? (HTTP? / Socket?)Scary Wombat– Scary Wombat2014-03-04 04:17:34 +00:00Commented Mar 4, 2014 at 4:17
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3 Answers
try this it may help
public boolean reset() {
DataInputStream is;
DataOutputStream os;
boolean result = true;
String noReset = "Could not reset.";
String reset = "The server has been reset.";
try {
Socket socket = new Socket(InetAddress.getByName("x.x.x.x"), 3994);
String string = "{\"id\":1,\"method\":\"object.deleteAll\",\"params\":[\"subscriber\"]}";
is = new DataInputStream(socket.getInputStream());
os = new DataOutputStream(socket.getOutputStream());
PrintWriter pw = new PrintWriter(os);
pw.println(string);
pw.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(is));
JSONObject json = new JSONObject(in.readLine());
if(!json.has("result")) {
System.out.println(noReset);
result = false;
}
is.close();
os.close();
} catch (IOException e) {
result = false;
System.out.println(noReset);
e.printStackTrace();
} catch (JSONException e) {
result = false;
System.out.println(noReset);
e.printStackTrace();
}
System.out.println(reset);
return result;
}
8 Comments
user3377374
thanks for the help , will this work for the standalone application ? as my application is not a web app .
user3377374
aaah thanks a lot its worked :) m able to send the request to server . However i m gettign an error : net.sf.json.JSONException: Error while setting property=requestStatus type class java.lang.String , could you please suggest me what could be the reason of this error ?
Engineer
@user3377374 i didnt get your point paste the error in other question and acpet this answer beacuse i dont know where the error is occuring its difficult to read code in comment
user3377374
ok i will post new question for the error . Yes this is a right answer becoz now i am able to send the JSON object to server .
user3377374
ok sure , m sorry m new :( i didnt knew that , well where is the button to click for the right answer i will do that . please elt me know .
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Use Restlet:
// Create the client resource
ClientResource resource = new ClientResource("http://restlet.org");
// Write the response entity on the console
resource.post(yourJsonObject).write(System.out);
See http://restlet.org/learn/tutorial/2.1/#part02 for more details.
Comments
you can use Jackson JSON processor to convert your Java Object to JSON String and send it to server.
ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
String jsonString = ow.writeValueAsString(yourObject);
Then you can use HTTPClient to post the String to server:
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpPost request = new HttpPost("http://x.x.x.x:3994");
request.addHeader("Content-Type", "application/json");
request.setEntity(jsonString);
HttpResponse response = httpClient.execute(request);
...
httpClient.getConnectionManager().shutdown();
Or, if you are connected using Sockets:
Socket socket = new Socket(InetAddress.getByName("x.x.x.x"), 3994);
DataInputStream is = new DataInputStream(socket.getInputStream());
DataOutputStream os = new DataOutputStream(socket.getOutputStream());
PrintWriter pw = new PrintWriter(os);
pw.println(jsonString);
pw.flush();
BufferedReader in = new BufferedReader(new InputStreamReader(is));
JSONObject json = new JSONObject(in.readLine());
....
is.close();
os.close();
