CSV Builder Java

This tool creates CSV data from Java-side inputs, aimed at developers, testers, and data engineers who require deterministic CSV results for tests, sample datasets, or export workflows. It accepts headers and rows and outputs plain CSV text that adheres to common dialect rules and encoding expectations.
Internally, the generator respects a configurable delimiter, quotes values containing special characters, and escapes embedded quotes by doubling them. It supports optional BOM, and can include or skip a header row. Users can direct output to a String builder or to a stream, enabling in-memory generation or streaming for large datasets. Validation checks ensure headers exist, rows align with the header length (padding with a null placeholder or truncating excess fields), and encoding is valid.
In typical use, you supply a header array like ["id", "name", "email"] and a list of rows such as [[1, "Alice", "[email protected]"], [2, "Bob", null]]. The tool then returns a CSV string like "id,name,email\r\n1,Alice,[email protected]\r\n2,Bob," with appropriate quoting and escaping as required by the chosen dialect. This is valuable for unit tests, API response simulations, and data export tasks in Java pipelines. It differentiates itself with robust edge-case handling, optional streaming, and clear control over encoding, delimiter, and line endings.