convert to json string code example

Example 1: Javascript object to JSON string

var person={"first_name":"Tony","last_name":"Hawk","age":31};
var personJSONString=JSON.stringify(person);

Example 2: convert json.stringify to array in javascript

const myObj = {
  name: 'Skip',
  age: 2,
  favoriteFood: 'Steak'
};

const myObjStr = JSON.stringify(myObj);

console.log(myObjStr);
// "{"name":"Skip","age":2,"favoriteFood":"Steak"}"

console.log(JSON.parse(myObjStr));
// Object {name:"Skip",age:2,favoriteFood:"Steak"}

Example 3: js string to json

var obj = JSON.parse("{no:'u',my:'sql'}");//returnes {no:'u',my:'sql'}

Example 4: convert json to object

Jackson Data-bind depdendency that take care of 
Converting between 
JSON to Java Object 
and 
Java Object to JSON

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.0</version>
</dependency>