Parse json to object

Question

I am a newbie in Java, i'm researching how to parse json to object in java.

I have the following Json content:

{
"objects": [
 {
 "type": "image",
 "left":0,
 "top":0,
 "width":787,
 "height":1165,
 "src":"image/16_011020002_000_bk.PNG",
 "replaceable":false,
 "lockObject":false
 },
 {
 "type": "image",
 "left":70,
 "top":54,
 "width":669,
 "height":469,
 "src":"image/16_011020002_000_il.PNG",
 "replaceable":false,
 "lockObject":false
 },
 {
 "left":70,
 "top":54,
 "width":669,
 "height":469,
 "direction":"v",
 "fontFamily":"KaitiEG4-Medium-SJIS",
 "fill":"#55626C",
 "text":"旧年中は大変お世話になり\nありがとうございました\n本年も相変わらずご支援のほど\nお願い申し上げます\n\n    平成二十八年 元旦",
 "textAlign":"left",
 "lockObject":false
 },
 {
 "left":70,
 "top":54,
 "width":669,
 "height":469,
 "direction":"v",
 "fontFamily":"LeisuEG4-Medium-SJIS",
 "fill":"#55626C",
 "text":"謹んで\n 初春のお慶びを\n  申し上げます",
 "textAlign":"left",
 "lockObject":false
 }
]
}

How to design an object for this json and how to parse json to that object? Help me this issue. Thank you!

• Jens: Read about jackson library
• dawidklos: mark my answer as answered, so if someone will check out this question, will find answer immediatly

Answer 1

Use some kind of JSON parser.

GSON

https://github.com/google/gson

or Jackson

http://www.mkyong.com/java/how-to-convert-java-object-to-from-json-jackson/

Answer 2

I hope it will help you...!
use Jackson-

 JSONArray objects=new JSONObject(jsondata).getJSONArray("objects"); 
 for(int i=0;i<objects.length();i++){ 
 JSONObject object=objects.getJSONObject(i); 
 System.out.println("value of left=="+object.getString("left")); 
 System.out.println("value of top=="+object.getString("top")); 
 } 

• dawidklos: I think GSON might be simplier for newbie
• user3161772: Thank you very much! @vikas balyan

Answer 3

As per your question its seems to be an array representing the json data of type object.

To parse the data we can use the above two parsers mentioned by d__k.

I have been using Jackson and we have a ObjectMapper class which converts the data in the specified type. We can use ObjectMapper#readValue to read the data into java object.

Kindly find more information at this link.