Json - Library

Javascript

• Node: Reading a JSON from a file

const dataObject = JSON.parse(fs.readFileSync('data/file.json').toString());

• Writing with writing (stringify)

await util.promisify(fs.writeFile)('./dir/file.json', JSON.stringify(object, null, ' '));

Javascript

• Json can be read natively by javascript

// a variable
var human = {  
     name : "Robot",
     sex : "Unknown"        
}
// we call the function  
console.log(human.name+" has a "+ human.sex+ " sex"); 

• With Json.stringify, we can create a JSON from a javascript object

// a variable
var humanObject = {  
     name : "Robot",
     sex : "Unknown"        
}
// we call the function  
console.log(JSON.stringify(humanObject)); 

Javascript Prettify

with spacing level = 2

var str = JSON.stringify(obj, null, 2); 

Java

• Jackson: How to read and write JSON data with Jackson Core?
• Org.json - Java

String json = "{"
         + "  \"query\": \"Pizza\", "
         + "  \"locations\": [ 94043, 90210 ] "
         + "}";

 JSONObject object = (JSONObject) new JSONTokener(json).nextValue();
 String query = object.getString("query");
 JSONArray locations = object.getJSONArray("locations");