[Java] Realize the conversion of Http Server && object and JSON

Simple Http Server using native Java

Create a simple HTTP-based Web Server application using the HttpServer Class provided by JDK

Use Jackson to complete the conversion of objects and JSON

If you can’t remember which package it is, look it up in the maven repository

, copy this
and then pull the json package

Serialization: object -> json
Deserialization: json->object

If there is no Person() parameterless construction, an error will be reported.