JSON tutorial in java - in detail with full programs



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JSON in Java - 

We will use Java API (JSR 353) for Processing JSON. This java Api provides portable APIs to parse, generate, transform, and query JSON using object model and streaming APIs.

What is JSON?
JSON stands for JavaScript Object Notation.

JSON is a lightweight, text-based, language-independent data exchange format that is easy for humans and machines to read and write. 

JSON can be used to represent following structured types >
  • Objects - An object is an unordered collection of zero or more name/value pairs 
  • Arrays - An array is an ordered sequence of zero or more values. 
The values can be of type strings, numbers, booleans, null.

Related links >

1. Jackson JSON - 

We can use Jackson api for for processing JSON in java.

Jackson JSON examples

  1. Convert JSON string to java Object - using Jackson
  2. Convert java object to JSON string and pretty print Json in java - using Jackson
  3. convert JSON string to java Map - using Jackson
  4. convert java Map to JSON string
  5. How to rename JSON properties in java- Jackson api
  6. How to ignore JSON properties in java- Jackson api
  7. How to order JSON properties in java - using Jackson
  8. How to ignore empty or null values in JSON java - using Jackson
  9. DATES in JSON - jackson api java
  10. How can we read only specific properties from json in java - using Jackson
  11. Read json from URL in java - using Jackson

2. Java provides API (JSR 353) for Processing JSON (JSR 353).
It provides -
  • Object Model API
  • Streaming API

Java API for JSON processing examples >
  1. Read Json data using javax.json.JsonReader - Read int, String and Array in java
  2. Create JSON using javax.json.JsonObjectBuilder - Write int, String and Array in java
  3. Create Json using Streaming Model API

3. Simple (simple.JSONObject)

  1. Create JSON using json.simple.JSONObject in java
  2. Reading JSON using json.simple.JSONObject in java

4. Google Gson - processing java json


  1. Convert java Object to JSON string using com.google.gson.Gson in java
  2. Convert java Object to JSON string and PRETTY PRINT using com.google.gson.Gson in java
  3. JSON string to java object using com.google.gson.Gson in java
  4. How to convert JSON array to List using com.google.gson.Gson in java
  5. How to convert JSON to Map in java using com.google.gson.Gson in java
  6. Convert java Object to JSON string and RENAME PROPERTIES using com.google.gson.Gson in java
  7. Convert java Object to JSON string and EXCLUDE/IGNORE PROPERTIES using com.google.gson.Gson in java

5. TroubleShooting >


For new maven users - 


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