Json stands for Java script Object Notation and Gson is like json which is developed bye Google. Jackson is also one type of Json which works similar to json. in this slide i am showing The performance comparison between Json, Gson and Jackson.

1. JSON vs GSON vs
JACKSON
- Vinaykumar Hebballi

2. Topics to cover
 Overview of JSON
 The working of GSON
 The working of JACKSON
 Comparison of JSON,GSON and JACKSON.
 Conclusion
2JSON vs GSON vs JACKSON06/21/16

3. What is JSON
 JSON is a lightweight data interchange format .
 The most important aspects of JSON are
 Simplicity
 Extensibility
 Interoperability
 Openness and Human readability.
3JSON vs GSON vs JACKSON06/21/16

4. The working of GSON
 GSON is an Java library to serialize and deserialize Java
objects to (and from) JSON.
 It provides two methods :-
 Gson.toJson to serialize java objects.
 Gson.fromJson to deserialize json objects.
4JSON vs GSON vs JACKSON06/21/16

5. GSON Example
 Serialization:-
 Gson gson = new Gson();
Car audi = new Car("Audi", "A4", 1.8, false);
Car skoda = new Car(“Skoda", "Octavia", 2.0, true);
Car[] cars = {audi, skoda};
Person johnDoe = new Person("John", "Doe", 245987453, 35,
cars);
System.out.println(gson.toJson(johnDoe));
5JSON vs GSON vs JACKSON06/21/16

6. GSON Example
 Deserialization:-
 Gson gson = new Gson();
String json = "{"name":"John","surname":"Doe","cars":
[{"manufacturer":"Audi","model":"A4","capacity":1.8,"a
ccident":false},
{"manufacturer":"Škoda","model":"Octavia","capacity":2.
0,"accident":true}], "phone":245987453}";
Person johnDoe = gson.fromJson(json, Person.class);
System.out.println(johnDoe.toString());
6JSON vs GSON vs JACKSON06/21/16

7. The working of JACKSON
 It is a Java library for processing JSON.
 Jackson aims to be the best possible combination of fast,
correct, lightweight, and friendly for developers.
 Jackson offers three alternative methods:-
 Stream API
 Tree Model
 Data Binding
7JSON vs GSON vs JACKSON06/21/16

8. JACKSON Example- Data Binding
 Read the Values from JSON file:-
 ObjectMapper mapper = new ObjectMapper();
User user = mapper.readValue(new File("user.json"), User.class);
 Write the values To the JSON file:-
 mapper.writeValue(new File("user-modified.json"), user);
8JSON vs GSON vs JACKSON06/21/16

9. JACKSON Example- Tree Model
 Tree Model:-
 ObjectMapper mapper = new ObjectMapper();
ArrayNode arrayNode = mapper.createArrayNode();
ObjectNode objectNode = mapper.createObjectNode();
objectNode.put("Firstname", student.getFirstName());
objectNode.put("Lastname",student.getLastName());
objectNode.put("age", student.getAge());
objectNode.put("address", student.getAddress());
objectNode.put("studentId", student.getStudentId());
arrayNode.add(objectNode);
9JSON vs GSON vs JACKSON06/21/16

10. JACKSON Example- Stream API
 Writing to File:-
JsonFactory f = new JsonFactory();
JsonGenerator g =f.createJsonGenerator(new File("user.json"));
g.writeStartObject();
g.writeStartArray();
g.writeEndArray();
g.writeEndObject();
g.close();
06/21/16 JSON vs GSON vs JACKSON 10

11. JACKSON Example- Stream API
JsonFactory jfactory = new JsonFactory();
JsonParser jParser = jfactory.createJsonParser(new File("c://temp/user.json"));
while (jParser.nextToken() != JsonToken.END_OBJECT) {
if ("name".equals(fieldname)) {
jParser.nextToken();
System.out.println(jParser.getText()); }
if ("age".equals(fieldname)) {
jParser.nextToken();
System.out.println(jParser.getIntValue()); }
if ("messages".equals(fieldname)) {
jParser.nextToken();
while (jParser.nextToken() != JsonToken.END_ARRAY) {
System.out.println(jParser.getText()); }}
06/21/16 JSON vs GSON vs JACKSON 11

12. COMPARISON-Big File
12JSON vs GSON vs JACKSON06/21/16

13. COMPARISON-Small File
13JSON vs GSON vs JACKSON06/21/16

14. CONCLUSION
 If you are dealing with big JSON files, then Jackson is your
library of interest.
 If you are dealing with with lots of small JSON requests then
GSON is your library of interest.
 If you end up having to often deal with both types of files,
then JSON.simple. Neither Jackson nor GSON perform as
well across multiple files sizes.
14JSON vs GSON vs JACKSON06/21/16

15. References:
 www.json.org
 http://wiki.fasterxml.com/JacksonHome
 https://google-
gson.googlecode.com/svn/trunk/gson/docs/javadocs/c
om/google/gson/Gson.html
15JSON vs GSON vs JACKSON06/21/16

16. Thank you