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我在 json-io 这个 Java 序列化库中实现了 TOON 支持。TOON 是一种基于缩进的格式，专为 LLM 应用设计，因为在这些应用中，每个令牌都需要付费并占用上下文窗口。与 JSON 相同的数据，令牌数量减少约 40-50%。没有大括号、方括号、逗号或不必要的引号。统一对象的数组会自动转换为类似 CSV 的表格。JSON: {"team":"Rockets","players":[{"name":"John","age":30},{"name":"Sue","age":27}]}TOON: team: Rockets players: name, age John, 30 Sue, 27json-io 可以读取和写入 JSON、JSON5 和 TOON，支持 60 多种内置 Java 类型，具有循环支持和零配置。此外，还有一个 Spring Boot 启动器和 Spring AI 模块。GitHub: <a href="https://github.com/jdereg/json-io" rel="nofollow">https://github.com/jdereg/json-io</a> TOON 规范: <a href="https://toonformat.dev" rel="nofollow">https://toonformat.dev</a> Baeldung 文章: <a href="https://www.baeldung.com/java-json-toon-format-libraries" rel="nofollow">https://www.baeldung.com/java-json-toon-format-libraries</a>

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I built TOON support into json-io, a Java serialization library. TOON is an indentation-based format designed for LLM applications where every token costs money and eats context window.Same data as JSON, ~40-50% fewer tokens. No braces, brackets, commas, or unnecessary quoting. Arrays of uniform objects become CSV-like tables automatically.JSON: {"team":"Rockets","players":[{"name":"John","age":30},{"name":"Sue","age":27}]}TOON: team: Rockets players: name, age John, 30 Sue, 27json-io reads/writes JSON, JSON5, and TOON with 60+ built-in Java types, cycle support, and zero config. There's also a Spring Boot starter and Spring AI module.GitHub: <a href="https://github.com/jdereg/json-io" rel="nofollow">https://github.com/jdereg/json-io</a> TOON spec: <a href="https://toonformat.dev" rel="nofollow">https://toonformat.dev</a> Baeldung article: <a href="https://www.baeldung.com/java-json-toon-format-libraries" rel="nofollow">https://www.baeldung.com/java-json-toon-format-libraries</a>

展示HN：JSON-io – 用于JSON、JSON5和TOON的Java库（减少40%的LLM令牌）