Show HN: JSON-io – Java 库，支持 JSON、JSON5 和 TOON (LLM 令牌减少 40%)
1 分•作者: jdereg•5 个月前
我为 Java 序列化库 json-io 构建了 TOON 支持。TOON 是一种基于缩进的格式，专为 LLM（大型语言模型）应用设计，在这些应用中，每个 token 都会消耗费用并占用上下文窗口。
它与 JSON 存储相同的数据，但 token 数量减少了约 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:
```json
{"team":"Rockets","players":[{"name":"John","age":30},{"name":"Sue","age":27}]}
```
TOON:
```
team: Rockets
players:
name, age
John, 30
Sue, 27
```
json-io 可以读取/写入 JSON、JSON5 和 TOON 格式，支持 60 多种内置 Java 类型，循环引用，并且无需配置。它还有一个 Spring Boot Starter 和 Spring AI 模块。
GitHub: [https://github.com/jdereg/json-io](https://github.com/jdereg/json-io)
TOON 规范: [https://toonformat.dev](https://toonformat.dev)
Baeldung 文章: [https://www.baeldung.com/java-json-toon-format-libraries](https://www.baeldung.com/java-json-toon-format-libraries)
查看原文
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.<p>Same data as JSON, ~40-50% fewer tokens. No braces, brackets, commas, or unnecessary quoting. Arrays of uniform objects become CSV-like tables automatically.<p>JSON:
{"team":"Rockets","players":[{"name":"John","age":30},{"name":"Sue","age":27}]}<p>TOON:
team: Rockets
players:
name, age
John, 30
Sue, 27<p>json-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.<p>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>