OpenCSV vs Apache Commons CSV vs SuperCSV
CSV (Comma-Separated Values) files are widely used for data exchange, but parsing them manually in Java can be error-prone. To streamline this process, here’s a breakdown of the best Java…
How to Iterate Over a JSONObject: 3 Proven Methods (2024 Guide)
Iterating over a JSONObject in Java is a common task when handling JSON data, especially when dealing with dynamic or nested structures. This guide presents three effective methods to traverse…
How to Exclude Fields in JSON Serialization (But Not Deserialization) Using @JsonIgnore
Struggling to hide sensitive fields like passwords in JSON responses—without breaking user registration? In this guide, you'll learn how to use @JsonIgnore for serialization only, so you can hide data…
Gson Field Exclusion Without Annotations: The Complete Guide
Last updated: May 1, 2025 Working with JSON in Java often requires customizing serialization behavior, and Gson makes this process relatively straightforward. However, excluding specific fields from serialization, especially nested…
Upload Files and JSON in Postman: Complete Spring MVC Guide
Are you struggling with uploading files and JSON data simultaneously in Postman while testing your Spring MVC application? This common challenge frustrates many developers, but with the right approach, you…
How to Fix Jackson JsonMappingException: No Suitable Constructor Found
Struggling with "No suitable constructor found" error in Jackson? Learn step-by-step solutions to resolve JsonMappingException and instantiate Java objects from JSON seamlessly. Table of Contents Understanding the Error Why This…
Deserialize Generic Types in Gson: Ultimate Guide
In this guide, you’ll discover five effective techniques to deserialize generic types with Gson, including the classic TypeToken approach, simple array-to-list conversion, custom ParameterizedType wrappers, subclassing ArrayList, and the modern…
How to Convert JSON String to JSONObject in Java (5 Easy Methods)
In Java, you can convert a JSON-formatted string into an in-memory JSON object representation using several popular libraries, each offering its own API and features. The simplest is the lightweight…
Ignore Unknown JSON Fields Using Jackson: 3 Proven Solutions
Discover three reliable ways to configure Jackson to ignore unknown JSON fields using annotations, ObjectMapper, and Spring Boot. Prevent crashes and ensure backward compatibility in your Java or Android apps.…
How to Use Jackson to Deserialize an Array of Objects in Java
Jackson is a popular JSON library for Java that can easily convert JSON arrays into Java object arrays or collections In this tutorial, How to Use Jackson to Deserialize an…
How to Parse JSON in Java: A Complete Tutorial
Meta Description: Learn how to parse JSON in Java using libraries like org.json, Jackson, Gson, javax.json, and JsonPath. This guide provides step-by-step examples, pros/cons, and best practices for Java JSON…
Converting HTML to PDF: 6 Powerful Java Solutions for Developers
Converting HTML files to PDF format is a common requirement in many web applications. Whether you need to generate reports, invoices, or documentation, transforming web content into portable, print-friendly PDF…