Jackson tutorial Archives - Learn Java by Examples

Pretty print JSON in Java (Jackson)

January 17, 2017September 9, 2016 by javabycode.com

The Pretty print JSON in Java tutorial shows you how to use Jackson pretty print for JSON Object and String in the console. Pretty Print JSON Object Example to convert Object and jackson pretty print its output in JSON format.

Student student = new Student();
//set student data
student.setName("David");
student.setAge("35");
student.setCourses(new String[]{"Math","Foreign Language","Animal Biology"});

//print json format
ObjectMapper mapper = new ObjectMapper();
System.out.println(mapper.writeValueAsString(student));

Student student = new Student();

//set student data

student.setName("David");

student.setAge("35");

student.setCourses(new String[]{"Math","Foreign Language","Animal Biology"});

//print json format

ObjectMapper mapper = new ObjectMapper();

System.out.println(mapper.writeValueAsString(student));

And the json output is in compact mode.

{"name":"David","age":35,"courses":["Math","Foreign Language","Animal Biology"]}

1	{"name":"David","age":35,"courses":["Math","Foreign Language","Animal Biology"]}

To enable jackson pretty print, … Read morePretty print JSON in Java (Jackson)

Jackson Json Annotation Example

January 17, 2017August 23, 2016 by javabycode.com

This tutorial introduces about JSON Annotations via Jackson JSON Annotation Example. Jackson JSON Annotations are implemented exactly as approach read and write of JSON data-binding. But the different point is properties of POJO are annotated at running time. Table of contents: 1. Project structure 1. JACKSON dependency 2. Create input JSON 3. Create POJO with … Read moreJackson Json Annotation Example

Jackson Json Streaming Example

January 17, 2017August 22, 2016 by javabycode.com

This tutorial introduces about Streaming API by creating Jackson Json Streaming Example. Jackson Framework has implemented a useful Streaming API which is also called incremental mode. With Streaming API, Jackson Framework consumes low memory and less processing overhead. While Jackson is high performance and sequential access api. Especially, it can often match performance of many … Read moreJackson Json Streaming Example

Json Tree Model Example using Jackson API

October 31, 2017July 19, 2016 by javabycode.com

This post introduces Json Tree Model Example using Jackson API. Actually, JSON can be represented as a Tree (similar to DOM tree). Therefore, we are possible to traverse to individual nodes in the tree in order to access/edit their values. Let’s start to build Json Tree Model Example JACKSON dependency in pom.xml There are several … Read moreJson Tree Model Example using Jackson API

Convert Java Object to/from JSON using JACKSON API

October 31, 2017July 14, 2016 by javabycode.com

In this tutorial, we will show you how to use Jackson 2.x to convert Java object to/from JSON using Jackson API. The class ObjectMapper is the main api of Jackson 2.x used for data-binding. It comes with several reader/writer methods to preform the conversion from/to Java and JSON. Quick Reference Convert Java object to JSON … Read moreConvert Java Object to/from JSON using JACKSON API