Json into Array

Question

I am reading a JSON file into one string and one array. I already have a string where the JSON is saved, let's call it myString. Here is the JSON file:

JSON File

As you can see, the file contains three styles, from "styleCount": "3". My goal is to now create three string variables for each style, similar to the following pseudo variables:

String name_style1 should contain: "Sommer-Fashion"
String name_style2 should contain: "Dream-Style"
String name_style3 should contain: "Perfect-Look"

Then I need an array of strings for each style with the SKU numbers:

private String[] sku_style1 = new String[6];
sku_style1[0] = "392714";
sku_style1[1] = "395895";
sku_style1[2] = "392450";
sku_style1[3] = "371706";
sku_style1[4] = "383748";
sku_style1[5] = "385275";

And also for the other styles:

private String[] sku_style2 = new String[6];
private String[] sku_style3 = new String[6];

Is there a function of Java which helps with simply adding elements from a JSON file (or in my case a string: myString) into a string and an array?

Any help is appreciated.

Have you done any research on parsing JSON using/with Java or on any of the 3rd party libraries like GSON, etc.? — Jonny Henly
– Jonny Henly, Commented Jun 16, 2017 at 17:38
hey guys, code examples would be appreciated...just sending me links doesn't help me too much, since I am not that experienced. Thanks a lot! — Manuel
– Manuel, Commented Jun 16, 2017 at 18:11

spaff · Accepted Answer · 2017-06-16 18:17:22Z

2

Google GSON! No functions native to Java really help much, but Google GSON has helped me numerous times with issues much harder than this. I think you'll find it very helpful. Here is a link!

https://mvnrepository.com/artifact/com.google.code.gson/gson

EDIT

This link is for the repository for the jar downloads!

EDIT 2

Gson gson = new Gson();
Staff obj = new Staff();

// 1. Java object to JSON, and save into a file
gson.toJson(obj, new FileWriter("D:\\file.json"));

// 2. Java object to JSON, and assign to a String
String jsonInString = gson.toJson(obj);

edited Jun 16, 2017 at 18:17

answered Jun 16, 2017 at 17:37

spaff

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6 Comments

Manuel Over a year ago

do you have a practical example on how to solve this with the suggested solution, like an example line of code, thanks!

spaff Over a year ago

I would gladly, and I know you said "No more links", but this page is nothing but examples on using Google GSON. It's the same page I used when I used it for the first time and it really helped me format what I needed quickly! mkyong.com/java/…

spaff Over a year ago

I have also added a block of code to my answer. +1 if it helps!

Manuel Over a year ago

Awesome, thank you! Do you know how I can reformat the imported json to the requested String/array? Thanks a lot for your help again!

spaff Over a year ago

Once you've reached the end of the code block that I posted, you should have the entire JSON as a string. From there, simple String manipulation functinos that you write can search the String for specific tags/words/formats. However, while I haven't used GSON in a while, I believe that there are methods in which you pull parts of the json as a string to minimize how much you have to manipulate

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Legato · Accepted Answer · 2020-03-09 20:19:29Z

-1

There are JSON parson libraries that serve this exact purpose.

JSONArray

JSONString

1 Comment

Manuel Over a year ago

do you have a practical exampl how to do it in my case?

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