This project forked from devilfaker/jackson-homework
Homework for Java Serialization with Jackson
Homework Answer for Java Serialization with Jackson
通过使用Jackson注解或者其他定制化手段
使得EventController中的两个接口，能够接收和返回如下格式的JSON：
{
"id": "1",
"name": "下载文件",
"type": "D",
"time": 1590050488701,
"userId": "3",
"userName": "张三"
}其中时间是毫秒为单位的时间戳
要求PersonController返回Person时：
即当age和hobby不为null时，正常返回：
{
"id": "1",
"age": 18,
"name": "张三",
"hobby": "打篮球"
}当age和hobby为null时，返回：
{
"id": "1",
"age": 0,
"name": "张三"
}
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