json字段多对多映射

JSON是一种轻量级数据格式，常用于网络应用中数据传输，它支持多对多映射。

{
  "user": [
    {
      "name": "John","age": 25,"hobbies": ["reading","swimming"]
    },{
      "name": "Jane","age": 31,"hobbies": ["hiking","photography"]
    }
  ],"hobbies": [
    {
      "name": "reading","description": "enjoying books"
    },{
      "name": "swimming","description": "swimming in the pool"
    },{
      "name": "hiking","description": "exploring nature"
    },{
      "name": "photography","description": "taking pictures"
    }
  ]
}

在上述JSON数据中，"user"数组中每个对象都有一个"hobbies"数组，该数组中每个元素都是"hobbies"数组中的一个对象。这就实现了多对多的映射关系。

例如，John的爱好是"reading"和"swimming"，而"reading"的描述是"enjoying books"。通过多对多映射，我们可以轻松地获取到John的爱好对应的描述信息。