How to parse the JSON response in Blackberry/J2ME?

问题

I want to parse the response coming from the server in JSON format. I have done some googling but i can't find any library or jar kind of thing.

Everywhere there is provided open source code as zip file.

How can i achieve this? if there is no jar available for blackberry then how to use that open source code in my application??

回答1:

There is an open source JSON for J2ME API on Mobile and Embedded Application Developers Project

~~Also you can download JSON ME (Zip file) at JSON.org~~ not supported anymore. But you can get it from here.

I believe you can simply copy content of json project src folder to your Blackberry project src folder, refresh it in eclipse package explorer and build it.

See for details: Using JavaScript Object Notation (JSON) in Java ME for Data Interchange

回答2:

I am developing a Blackberry client application and I confronted the same problem. I was searching for JSON way of parsing the response which I get from the server. I am using Eclipse plug-in for BB as IDE and it comes with BB SDK including the ones for JSON.

The easiest answer to this question is that:

Initially do not forget to use this import statement:

    import org.json.me.JSONObject;

Then assign your JSON formatted response from the server to a String variable:

    String jsonStr = "{\"team\":\"Bursaspor\",\"manager\":\"Ertuğrul Sağlam\",\"year\":\"2010\"}";

Create a JSONObject:

    JSONObject obj = new JSONObject(jsonStr);

i.e. if you want to use the value of the "team" field which is "Bursaspor" then you should use your JSONObject like this:

    obj.getString("team")

This call will return the string value which is "Bursaspor".

P.S: I inspired this solution from this site which simply explains the solution of the same problem for Android development.

http://trandroid.com/2010/05/17/android-ile-json-parse-etme-ornegi-1/

回答3:

When you got response string then use this code

try { 
        JSONObject jsonres = new JSONObject(jsons);
        System.out.println("Preview icon from jsonresp:"+jsonres.getString("mydata"));
    } catch (JSONException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    }

one thing jsons is your response string which is in json format & mydata your key of data so you can get your data from JSONObject. Thnks

回答4:

chek this post to find out how to get JSONME source from SVN:

http://www.java-n-me.com/2010/11/how-to-import-source-code-from-svn-to.html

Hope it helps someone.

回答5:

You can also try :

http://pensivemode.fileave.com/verified_json.jar

I was also looking for a jar version of json (to link along my lib) :

https://radheshg.wordpress.com/tag/json/

but it seems not portable :

Building example
C:\Program Files (x86)\Research In Motion\BlackBerry JDE 4.5.0\bin\rapc.exe  -quiet  import="C:\Program Files (x86)\Research In Motion\BlackBerry JDE 4.5.0\lib\net_rim_api.jar";lib\${PROJECT}.jar;lib\json.jar codename=example\example example\example.rapc warnkey=0x52424200;0x52525400;0x52435200 Y:\src\${PROJECT}-java.git\example\src\mypackage\MyApp.java Y:\src\${PROJECT}-java.git\example\src\mypackage\MyScreen.java
tmp3139/org/json/me/JSONArray.class: Error!: Invalid class file: Incorrect classfile version
Error while building project

http://supportforums.blackberry.com/t5/Java-Development/JSON-library/m-p/573687#M117982

回答6:

So far JSON.simple is looking like a great viable option.

  JSONParser parser=new JSONParser();

  System.out.println("=======decode=======");

  String s="[0,{\"1\":{\"2\":{\"3\":{\"4\":[5,{\"6\":7}]}}}}]";
  Object obj=parser.parse(s);
  JSONArray array=(JSONArray)obj;
  System.out.println("======the 2nd element of array======");
  System.out.println(array.get(1));
  System.out.println();

来源：https://stackoverflow.com/questions/1470406/how-to-parse-the-json-response-in-blackberry-j2me

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json

blackberry

java-me