商城系统中的商品分类能帮助用户更快更精准的找到自己想要的商品，因此，商城系统中的商品分类代码有序，不仅能提升商城运行效率，还可以为商家二开节约成本费。
就下来分享Niushop开源商城V4的商品分类树状结构开发代码：
{
"code": 0,
"message": "操作成功",
"data": [{
"category_id": 21,
"category_name": "童装孕产",
"short_name": "",
"pid": 0,
"level": 1,
"image": "upload\/1\/common\/images\/20200721\/20200721062648159532720865256.jpg",
"category_id_1": 21,
"category_id_2": 0,
"category_id_3": 0,
"image_adv": "",
"child_list": [{
"category_id": 23,
"category_name": "时髦孕妈",
"short_name": "",
"pid": 21,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721063230159532755028243.jpg",
"category_id_1": 21,
"category_id_2": 23,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 22,
"category_name": "潮童鞋服",
"short_name": "",
"pid": 21,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721062941159532738183624.jpg",
"category_id_1": 21,
"category_id_2": 22,
"category_id_3": 0,
"image_adv": ""
}]
}, {
"category_id": 15,
"category_name": "手机数码",
"short_name": "",
"pid": 0,
"level": 1,
"image": "upload\/1\/common\/images\/20200721\/20200721041434159531927468422.png",
"category_id_1": 15,
"category_id_2": 0,
"category_id_3": 0,
"image_adv": "",
"child_list": [{
"category_id": 18,
"category_name": "影音娱乐",
"short_name": "",
"pid": 15,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721042503159531990349828.jpg",
"category_id_1": 15,
"category_id_2": 18,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 16,
"category_name": "摄影",
"short_name": "",
"pid": 15,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721041747159531946739979.jpg",
"category_id_1": 15,
"category_id_2": 16,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 19,
"category_name": "华为",
"short_name": "",
"pid": 15,
"level": 2,
"image": "",
"category_id_1": 15,
"category_id_2": 19,
"category_id_3": 0,
"image_adv": "",
"child_list": [{
"category_id": 20,
"category_name": "mate系列",
"short_name": "",
"pid": 19,
"level": 3,
"image": "",
"category_id_1": 15,
"category_id_2": 19,
"category_id_3": 20,
"image_adv": ""
}]
}]
}, {
"category_id": 12,
"category_name": "户外运动",
"short_name": "",
"pid": 0,
"level": 1,
"image": "upload\/1\/common\/images\/20200721\/20200721041140159531910019594.jpg",
"category_id_1": 12,
"category_id_2": 0,
"category_id_3": 0,
"image_adv": "",
"child_list": [{
"category_id": 14,
"category_name": "健身训练",
"short_name": "",
"pid": 12,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721041243159531916352574.jpg",
"category_id_1": 12,
"category_id_2": 14,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 13,
"category_name": "体育用品",
"short_name": "",
"pid": 12,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721041212159531913234194.jpg",
"category_id_1": 12,
"category_id_2": 13,
"category_id_3": 0,
"image_adv": ""
}]
}, {
"category_id": 9,
"category_name": "食品生鲜",
"short_name": "",
"pid": 0,
"level": 1,
"image": "upload\/1\/common\/images\/20200721\/20200721040847159531892765616.jpg",
"category_id_1": 9,
"category_id_2": 0,
"category_id_3": 0,
"image_adv": "",
"child_list": [{
"category_id": 11,
"category_name": "油类",
"short_name": "",
"pid": 9,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721041010159531901092696.jpg",
"category_id_1": 9,
"category_id_2": 11,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 10,
"category_name": "牛奶",
"short_name": "",
"pid": 9,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721040925159531896563077.jpg",
"category_id_1": 9,
"category_id_2": 10,
"category_id_3": 0,
"image_adv": ""
}]
}, {
"category_id": 5,
"category_name": "电脑办公",
"short_name": "",
"pid": 0,
"level": 1,
"image": "upload\/1\/common\/images\/20200721\/20200721040434159531867434874.png",
"category_id_1": 5,
"category_id_2": 0,
"category_id_3": 0,
"image_adv": "",
"child_list": [{
"category_id": 8,
"category_name": "网络产品",
"short_name": "",
"pid": 5,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721040752159531887295280.jpg",
"category_id_1": 5,
"category_id_2": 8,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 7,
"category_name": "外设产品",
"short_name": "",
"pid": 5,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721040703159531882317928.jpg",
"category_id_1": 5,
"category_id_2": 7,
"category_id_3": 0,
"image_adv": ""
}, {
"category_id": 6,
"category_name": "电脑整机",
"short_name": "",
"pid": 5,
"level": 2,
"image": "upload\/1\/common\/images\/20200721\/20200721040546159531874649319.png",
"category_id_1": 5,
"category_id_2": 6,
"category_id_3": 0,
"image_adv": ""
}]
}],
"timestamp": **********
}
希望能帮助到大家！
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