how to convert json into java object code example
Example 1: convert json string to json object in java
try {
JSONObject jsonObject = new JSONObject("{\"phonetype\":\"N95\",\"cat\":\"WP\"}");
}catch (JSONException err){
Log.d("Error", err.toString());
}
Example 2: how to convert jsonobject to json string in java
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
public class TestJSON {
public static void main(String[] args) {
JSONObject jObject = new JSONObject();
jObject.put("EmployeeId", new Integer(121));
jObject.put("Name", "Ramesh");
jObject.put("Salary", new Double(15000.00));
jObject.put("isPermanent", new Boolean(true));
jObject.put("Nickname", null);
String jsonText = jObject.toJSONString();
System.out.println(jsonText);
JSONParser parser = new JSONParser();
JSONObject newJObject = null;
try {
newJObject = (JSONObject) parser.parse(jsonText);
} catch (ParseException e) {
e.printStackTrace();
}
System.out.println(newJObject.get("EmployeeId"));
System.out.println(newJObject.get("Name"));
System.out.println(newJObject.get("Salary"));
System.out.println(newJObject.get("isPermanent"));
System.out.println(newJObject.get("Nickname"));
}
}
Example 3: how to convert json to java object
Jackson Data-bind depdendency that take care of
Converting between
JSON to Java Object
and
Java Object to JSON
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.12.0</version>
</dependency>
Example 4: How To Convert Json To Java Object
I add GSON dependency in my POM --> It’s a json parser. That is
used to convert from java object to json and from json to java
object
SERIALIZATION: CONVERT JAVA OBJECT -> JSON
DE-SERIALIZATION: CONVERT JSON -> JAVA OBJECT