JSON (JavaScript Object Notation) is designed based on a subset of ECMAScript and is an open standard file format and data exchange format that is easy for humans to read and write, as well as for machines to parse and generate. JSON is independent of language design, and many programming languages support data exchange in JSON format. JSON is a commonly used data format with multiple uses in electronic data exchange, including data exchange between web applications and servers. Its concise and clear hierarchical structure effectively improves network transmission efficiency, making it an ideal data exchange language. Its files usually use the extension. json