下面這種形式的json，用java 插入到mongodb怎么實(shí)現(xiàn)比較好

下面這樣的json想插到db里面，用java，但是感覺有點(diǎn)復(fù)雜，好多層，
請(qǐng)問有什么好的方式么或者該怎么做，謝謝

{
  "zzList": [
    {
      "zzID": "100000001",
      "contracts": [
        {
          "type": "hahaha12",
          "xxID": "hahaha23232",
          "ccID": "hahaha32",
          "vvRemarks": "hello world",
          "childIDList": [
            "abc"
          ],
          "rules": [
            {
              "money001": 1000.00,
              "point1": 100
            },
            {
              "money002": 5001.00,
              "point2": 30
            }
          ],
          "elig": {
            "startDate": "2018-05-01 00:00:00Z",
            "endDate": "2018-08-31 23:59:59Z"
          },
          "restrictions": {
            "unt": 3000000.00,
            "maxNum": 0
          },
          "costPer": 0.01,
          "uoCode": "EL0"
        },
        {
          "type": "animal",
          "hiId": "200011111""yyList": [
            "a123",
            "b456"
          ],
          "money01": 0.00,
          "point": 0,
          "eli": {
            "startDate": "2018-05-01 00:00:00Z",
            "endDate": "2018-08-31 23:59:59Z"
          },
          "desp": {
            "money02": 3000000.00
          },
          "cost": 0.01,
          "code": "EL0",
          
        }
      ]
    }
  ]
}