How can I read json file in java, update the values and store it back to same file?

Question

I have a json file as below and now I need to update the pincode value Everytime before using and use the updated json file for processing,how can I achieve the same using Java?

{ 
    "Name":"Ramesh",
    "City":"Bangalore",
    "Address": {
        " Pincode":56010
    }
}

You must first parse the JSON data into a usable datatype. Then you update the value to whatever you need and then send that value back. — Hayes Roach, Jul 10 '19 at 18:43
This is all detailed here: https://www.mkyong.com/java/jackson-2-convert-java-object-to-from-json/ — David Brossard, Jul 10 '19 at 18:47

score 0 · Answer 1 · answered Jul 10 '19 at 18:42

Umesh, My suggestion are listed as :

Open the file, read the content
Convert that json to object mapper(Jackson ObjectMapper).
Close the file.
Modify the Mapper Object with pincode as per your business
The convert the object mapper to json string
Open the same file to write the modify json string.

How can I read json file in java, update the values and store it back to same file?

1 Answers1