JSR-367: How to bind a simple json to object and extract data

Question

How to bind the json file to object. Here I am using JSR-367 API , yasson implementation to implement.

The JSON file looks like this

{
  "Details": [
    {
      "age": 27,
      "gender": "Male",
      "name": "John"
    },
    {
      "age": 27,
      "gender": "Male",
      "name": "Max"
    },
    {
      "age": 27,
      "gender": "FeMale",
      "name": "esh"
    }
  ]
}

For the above json I am created two Binding classes, Those are
This is for the array objects which are presented in the json.

1.

public class Details 
{
        private String name;
        private int age;
        private String gender;
        private long phoneNumber;

        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
        public String getGender() {
            return gender;
        }
        public void setGender(String gender) {
            this.gender = gender;
        }
        public long getPhoneNumber() {
            return phoneNumber;
        }
        public void setPhoneNumber(long phoneNumber) {
            this.phoneNumber = phoneNumber;
        }
}

and this is for Details array
2)

 public class Root 
 {
    private Details[] details;

    public Details[] getDetails() {
        return members;
    }   
 }

This is the main class for binding the classes from json file to object

public class TestJsonB 
{
    static final String JSON_FILE = "/media/Resources/Details.json";
    public static void main(String[] args) throws IOException 
    {    
        String content = new String(Files.readAllBytes(Paths.get(JSON_FILE)));
        Jsonb jsonB = JsonbBuilder.create();
        Root root = jsonB.fromJson(content,Root.class);
        Details[] details = root.getDetails();
        System.out.println(details);//null printing
    }
}

Help me to write the binding classes for the given json file.

There are many JSON Parsers out there that could help you parse the JSON and write the binder yourself ... as an example Checkout [Jackson](http://wiki.fasterxml.com/JacksonHome) and try it yourself first. — Exception_al, Jan 24 '17 at 11:55

Ravi MCA · Answer 1 · 2017-01-24T15:33:42.287

Please check this solution can be any helpful.

I made few changes to your Root.java

package com.test;

import java.util.ArrayList;

/**
 * 
 * @author Ravi P
 */
public class Root {

    ArrayList<Details> details;

    public ArrayList<Details> getDetails() {

        return details;
    }

    public void setDetails( ArrayList<Details> details ) {

        this.details = details;
    }
}

Main java class is

package com.test;

import java.nio.file.Files;
import java.nio.file.Paths;

import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;

/**
 * 
 * @author Ravi Palla
 */
public class Test {

    static final String JSON_FILE = "C:\\tmp\\Details.json";

    public static void main( String[] args ) {

        try {

            String content = new String( Files.readAllBytes( Paths.get( JSON_FILE ) ) );

            Jsonb jsonb = JsonbBuilder.create();

            Root root = jsonb.fromJson( content, Root.class );

            Details[] details = root.getDetails().toArray( new Details[ root.getDetails().size() ] );

            for ( Details memberDetails : details ) {

                System.out.print( "name: " + memberDetails.getName() + ", " );
                System.out.print( "age: " + memberDetails.getAge() + ", " );
                System.out.println( "gender: " + memberDetails.getGender() );
            }

        } catch ( Exception e ) {

            e.printStackTrace();
        }
    }
}

Output is:

name: John, age: 27, gender: Male
name: Max, age: 27, gender: Male
name: esh, age: 27, gender: FeMale

JSR-367: How to bind a simple json to object and extract data

1 Answers1