JSONToTable

JSON to Java Converter

Convert JSON data to Java classes with getters, setters, and Jackson annotations

JSON Input

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Java Output

Java code will appear here

Paste JSON in the input area to get started

How to Convert JSON to Java Classes - Step by Step Guide

Step 1

Input Your JSON Data

Start by adding your JSON data that needs to be converted to Java classes. The tool analyzes the structure to generate appropriate POJOs.

Example: Try This JSON Data

Copy and paste this JSON example to see how it works: ☕

{
  "product": {
    "id": 1001,
    "name": "Wireless Headphones",
    "description": "Premium noise-canceling headphones",
    "price": 199.99,
    "inStock": true,
    "categories": [
      "Electronics",
      "Audio",
      "Accessories"
    ],
    "manufacturer": {
      "name": "TechCorp",
      "country": "Japan",
      "website": "https://techcorp.com"
    }
  }
}
Step 2

Configure Java Options

Customize how your JSON is converted to Java classes! ⚙️ Choose annotations and code style preferences.

•
Jackson annotations: Generate Jackson annotations for JSON binding
•
POJO generation: Create clean Java POJOs with getters and setters
•
Nested classes: Handle complex JSON hierarchies with inner classes
•
Type mapping: Automatic Java type mapping from JSON data types
Step 3

Get Generated Java Code

Watch the transformation! ✨ Your JSON structure becomes clean, annotated Java classes.

Java Code Output

Your JSON becomes these Java classes:

import com.fasterxml.jackson.annotation.*;
import java.util.List;

public class Product {
    @JsonProperty("id")
    private Integer id;

    @JsonProperty("name")
    private String name;

    @JsonProperty("description")
    private String description;

    @JsonProperty("price")
    private Double price;

    @JsonProperty("inStock")
    private Boolean inStock;

    @JsonProperty("categories")
    private List<String> categories;

    @JsonProperty("manufacturer")
    private Manufacturer manufacturer;

    // Getters and setters...
}
Step 4

Copy or Download Java Code

Perfect! Now you can use your Java classes in your applications for JSON processing. 🚀

•
Copy to clipboard for immediate use in your Java projects
•
Download .java files for integration into your codebase
•
Use with frameworks like Spring Boot and JAX-RS
•
Enterprise applications and REST APIs

What is JSON to Java Conversion? 🔄

JSON to Java conversion transforms JSON data structures into Java classes with Jackson annotations for seamless data binding. This process analyzes JSON structure and generates Java POJOs that can serialize and deserialize JSON data, making it easy to work with JSON in Java applications.

The generated Java classes include proper getters/setters, Jackson annotations, and type mappings, enabling automatic JSON serialization and deserialization in Java applications and REST APIs.

Frequently Asked Questions

What Java annotations are generated for JSON binding?

The tool generates Jackson annotations like @JsonProperty("fieldName") for each field. These annotations enable automatic JSON serialization and deserialization, handling field name mapping between JSON and Java conventions.

Can I use the generated classes with Spring Boot?

Absolutely! The generated Java classes work perfectly with Spring Boot REST controllers, JPA entities, and service layers. They integrate seamlessly with Spring's JSON handling and validation frameworks.

How are nested JSON objects handled in Java?

Nested JSON objects become separate Java classes with proper relationships. The tool creates a class hierarchy that mirrors your JSON structure, with parent classes containing fields of child class types.

What Java data types are used for JSON values?

JSON strings become Java String, numbers become Integer/Double/BigDecimal, booleans become Boolean, arrays become List<T>, and objects become custom classes. The tool intelligently maps JSON types to appropriate Java wrapper types.

Are getters and setters included in the generated classes?

Yes! The generated Java classes include proper getter and setter methods following JavaBean conventions. This makes them compatible with frameworks that rely on reflection and bean property access patterns.

Is the JSON to Java converter free to use?

Yes, completely free with no limitations on JSON complexity, class generation, or usage frequency. No registration required, and you can generate unlimited Java classes from JSON data at no cost.