fastexcel VS Lombok

I'm using fastexcel to create the excel file, and I'm flushing it to the OutputStream after every row is written. Right now, I am using a FileOutputStream to write to disk. When the excel file is done being generated, I read it back in using InputStreamResource and stream the response. My thought process is that a ByteArrayOutputStream keeps everything in memory even if I'm flushing the excel file after every row, so I used the FileOutputStream. Does my logic track here? Or am I unnecessarily slowing things down with expensive filesystem IO?

fastexcel the fastest xlsx generation library

I would use some library like for example this one. So you collect all the data you want to store in a list or map, and iterate over it, then add them to the excel like shown in the documentation of the library (should always be the same way more or less for any library)

I've only had memory problems with apache poi. I only use https://github.com/dhatim/fastexcel now

The above class maps the json data to a java object we can work with. We use Lombok to generate constructors, getters and setters for our code and the Jackson Project to handle serialization and deserialization of json to pojo . We know the response is an array of objects representing the coffee and so above data structure is fit for this.

Almost a decade ago, I started reducing my boilerplate (and saving time with Lombok. It made my life much easier, simple as that. Ever since I've been looking into finding the smoothest solutions for saving time rather than handling all of it myself.

Lombok is a widely used library that simplifies Java code. The @NonNull annotation helps enforce non-null parameters, generating appropriate null checks:

Project Lombok

I gotta agree with /u/rzwitserloot I don't see anything in the lombok repo that indicates they have their "own compiler". I see the "reaching into javac internals" but that's it.

i looked into that and found this: https://github.com/projectlombok/lombok/issues/2310

Funny enough; /u/rzwitserloot is the author of Lombok, one of the most widely used Java libraries in the world. So it's not really some kind of random-ass Redditor they're having a discussion with either.

This removes the need to add the 'Project Lombok' library (and going through a phase of installing it in your Eclipse IDE; old school devs know what I am talking about) and speeds up development time. Java 14 added a new feature of 'Records' which allows you to do the same, but it doesn't offer a 'copy' method to ease your object creation and also enforces the 'final' keyword for variables making them immutable.

I get the main criticisms of Java, i.e. its verbosity and the requirement for a lot of boilerplate code, and understand why some people switched to Kotlin. But by using libraries such as lombok you can get rid of most of it and suddenly the incentives for switching aren't that big anymore. And in the end it's all JVM bytecode anyways.

I usually use this... https://projectlombok.org/