How to read JSON file in Java? ( Jackson Databind )

[@abhishekpatni5061]

Wow this is exactly what I was looking for. Thank you!!

[@arun7232]

such a good content noone explains like you about jackson databind.thanks for teaching us .keep uploading good content

[@TechRecipesTR]

Thank you Arun!

[@pritamsharma9957]

Thanks a lot, short but clear description, very helpful.

[@alekBold]

Very usefull, thank you

[@soitenlyNotRob]

Very good guide. Thank you so much

[@olaroslik4413]

Thank you!

[@asadhussain5715]

finally a worthy video

[@TusharBirole]

Thanks a lot.

[@bhawanagupta1371]

Thanks for the tutorial but want to know how we will update tha version of the package jackson- databind from a old version to current version ???

[@TechRecipesTR]

You need to update the pom.xml with latest version of jackson-databind and rebuild the project. you can find latest version on - mvnrepository.com/. Thank you.
com.fasterxml.jackson.core
jackson-databind
2.14.2

[@stefanodiluzio67]

How is it performance wise with 2+Gb JSON files? Are there any other solutions to read and process the json file in chunks?

[@TechRecipesTR]

Both Jackson and Gson have streaming implementations which can be used I believe. I need to check further and see if I can implement the same with streaming.

[@stefanodiluzio67]

@@TechRecipesTR That would be awesome to see, thanks :)

[@sebastianui3]

Is this supported on newer spring boot versions? I had some errors recently

[@TechRecipesTR]

Yes. It must be supported. Do you remember what errors you faced ?

[@sravandatha9511]

Will it work even after deployment

[@lillymaryyesudass8573]

How can I do if get the file and data (single string) from UI side like
Controller.java
Public Book uploadJson(@RequestPart("data") String data, @RequestPart("file") List file){
Book response = jsonDataService.uploadJson(data,file);
return response;
jsonDataService.class
public book uploadJson(String data, List file{
ObjectMapper objectMapper = new ObjectMapper();
List response = ObjectMapper.readValue(file, new TypeReference(){});
Return response;
}
If the file is not in the resourses, How to read the file and data if get from UI side and send the response ?

[@TechRecipesTR]

Looking at your code. I see that you are getting List you can iterate to get individual MultipartFile and then use MultipartFile.getInpitStream() to read the file content coming from UI.

[@lillymaryyesudass8573]

@@TechRecipesTR I have tried that I am getting File upload failed, where my file is nested Json file.

[@TechRecipesTR]

You should not upload it again as code is executing on the server itself. You can simply read the file using InputStreaam and use FileWriter to write it on disc.
Hope this helps!

[@lillymaryyesudass8573]

@@TechRecipesTR Thank you so much

[@sivakumarmummidi6730]

instead of objectmapper you said bloomberg like that, what it is

[@TechRecipesTR]

Project Lombok projectlombok.org/
It will reduce boilerplate code like a getter setter constructor. We can simply use annotations instead.