Goland - 无限极分类

package main

import (
    "encoding/json"
    "fmt"
)

type Good struct {
    Id     int    `json:"id"`
    Name   string `json:"name"`
    Parent int    `json:"parent"`
    Child  []Good `json:"child"`
}

func main() {
    iphone_v1 := Good{
        Id:     2,
        Name:   "iphone 14 pro",
        Parent: 1,
    }
    iphone_v2 := Good{
        Id:     3,
        Name:   "iphone 14 pro max",
        Parent: 1,
    }
    iphone_v3 := Good{
        Id:     4,
        Name:   "iphone 14 pro max 256",
        Parent: 3,
    }
    iphone_v4 := Good{
        Id:     5,
        Name:   "iphone 14 pro max 128",
        Parent: 3,
    }
    iphone_v5 := Good{
        Id:     6,
        Name:   "iphone 14 pro max 128 black",
        Parent: 5,
    }
    iphone := Good{
        Id:     1,
        Name:   "iphone 14",
        Parent: 0,
    }
    GoodList := []Good{iphone, iphone_v1, iphone_v2, iphone_v3, iphone_v4, iphone_v5}
    result := Exec(0, GoodList)
    //echo json
    data, _ := json.Marshal(result)
    fmt.Println(string(data))
}

func Exec(goodsType int, goods []Good) []Good {
    child := make([]Good, 0)
    for _, item := range goods {
        if goodsType == item.Parent {
            node := Exec(item.Id, goods)
            item.Child = append(item.Child, node...)
            child = append(child, item)
        }
    }
    return child
}

输出结果

[
  {
    "id": 1,
    "name": "iphone 14",
    "type": 0,
    "child": [
      {
        "id": 2,
        "name": "iphone 14 pro",
        "type": 1,
        "child": null
      },
      {
        "id": 3,
        "name": "iphone 14 pro max",
        "type": 1,
        "child": [
          {
            "id": 4,
            "name": "iphone 14 pro max 256",
            "type": 3,
            "child": null
          },
          {
            "id": 5,
            "name": "iphone 14 pro max 128",
            "type": 3,
            "child": [
              {
                "id": 6,
                "name": "iphone 14 pro max 128 black",
                "type": 5,
                "child": null
              }
            ]
          }
        ]
      }
    ]
  }
]