how to update existing JSON file in java

Question

This is my sample Json

 {
        "State": {
            "version": "1",
            "SName": "Test",
            "shippingDetails": {
                "Address1": "AP",
                "ZipCode": "1236"
            },
            "Directions": {
                "routes": [
                    {
                        "taxAmount": "0.0",
                        "Quantity": "5",
                        "bounds": {
                            "SerialVersion": [
                                {
                                    "text": "1.7 km",
                                    "value": "1729",
                                    "time": "02633"
                                },
                                {
                                    "text": "1.9 km",
                                    "value": "1829",
                                    "time": "02353"
                                },
                                {
                                    "text": "17 km",
                                    "value": "1059",
                                    "time": "02133"
                                }
                            ]
                        }
                    }
                ]
            }
        }
    }

I want to update SName, ZipCode,taxAmount,Quantity, and text[1] values are there any way to do this. I am taking JSON in a file and update tags are taking into HashMap

If you have them in the `HashMap`, you can directly change the values and convert it back to `JSON`. — Harshal Parekh, Feb 20 '20 at 22:09
@HarshalParekh i am taking json in file and tags which need to be updated in hash map not entire json — Siva, Feb 20 '20 at 22:21
Does this answer your question? [Convert JSON to Map](https://stackoverflow.com/questions/443499/convert-json-to-map) — Hedrack, Feb 21 '20 at 00:43
@HarshalParekh your solution is good for simple json. but it wont work with nested json. — iAutomate, Jul 06 '22 at 16:16
.put() is always for a *simple* JSON. If you need to update a nested JSON, you’ll have to .get() it first. — Harshal Parekh, Jul 06 '22 at 16:26

Harshal Parekh · Accepted Answer · 2020-02-26T22:34:02.563

2

JSONObject jsonObject = new JSONObject("Your_JSON_String");

JSONObject jsonObjectForState = jsonObject.getJSONObject(“State”);

jsonObjectForState.put("Sname", "New_Value_Here");

put(...) will replace the current value with new value. Similarly, you can update the other values. Once you are done, you can convert it back using:

jsonObject.toString();

And write it back to the file.

edited Feb 26 '20 at 22:34

answered Feb 20 '20 at 22:41

Harshal Parekh

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its not working and new tag is appending at outside of State{} – Siva Feb 26 '20 at 22:02
So that is from someone else who thinks the question might not help others in the future or the question quality is not upto the mark. In the future, please go through this before posting a question to avoid negative votes: https://codeblog.jonskeet.uk/2010/08/29/writing-the-perfect-question/ – Harshal Parekh Feb 28 '20 at 22:17

how to update existing JSON file in java

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