How to convert jsonString to JSONObject in Java
I have String variable called jsonString
:
{"phonetype":"N95","cat":"WP"}
Now I want to convert it into JSON Object. I searched more on Google but didn't get any expected answers!
Using org.json library:
try {
JSONObject jsonObject = new JSONObject("{\"phonetype\":\"N95\",\"cat\":\"WP\"}");
}catch (JSONException err){
Log.d("Error", err.toString());
}
To anyone still looking for an answer:
JSONParser parser = new JSONParser();
JSONObject json = (JSONObject) parser.parse(stringToParse);
You can use google-gson
. Details:
Object Examples
class BagOfPrimitives {
private int value1 = 1;
private String value2 = "abc";
private transient int value3 = 3;
BagOfPrimitives() {
// no-args constructor
}
}
(Serialization)
BagOfPrimitives obj = new BagOfPrimitives();
Gson gson = new Gson();
String json = gson.toJson(obj);
==> json is {"value1":1,"value2":"abc"}
Note that you can not serialize objects with circular references since that will result in infinite recursion.
(Deserialization)
BagOfPrimitives obj2 = gson.fromJson(json, BagOfPrimitives.class);
==> obj2 is just like obj
Another example for Gson:
Gson is easy to learn and implement, you need to know is the following two methods:
-> toJson() – convert java object to JSON format
-> fromJson() – convert JSON into java object
import com.google.gson.Gson;
public class TestObjectToJson {
private int data1 = 100;
private String data2 = "hello";
public static void main(String[] args) {
TestObjectToJson obj = new TestObjectToJson();
Gson gson = new Gson();
//convert java object to JSON format
String json = gson.toJson(obj);
System.out.println(json);
}
}
Output
{"data1":100,"data2":"hello"}
Resources:
Google Gson Project Home Page
Gson User Guide
Example