javascript - 嵌套 JSON 对象

Question

我对这个 JSON 对象非常陌生。所以我需要你们的帮助。我必须创建一个 JSON 对象，并且该对象有两个子对象。一个 child 有几个 child 。如果我的问题令人困惑，请引用下图。它类似于嵌套列表。例子:

产品列表

<ul>
    <li>CATEGORY_ID - A</li>
    <li>PRODUCT_DETAILS
        <ul>
            <li>PRODUCT_ID - A.1</li>
            <li>PRODUCT_NAME - AAAA1111</li>
            <li>UNIT_COST - 0.1</li>
        </ul>
    </li>
    <li>CATEGORY_ID - B</li>
    <li>PRODUCT_DETAILS
        <ul>
            <li>PRODUCT_ID - B.1</li>
            <li>PRODUCT_NAME - BBBBB1111</li>
            <li>UNIT_COST - 0.2</li>
        </ul>
    </li>
</ul>

我尝试这样做，但遇到了 JavaScript 错误。任何人都可以帮助为上述图表创建 JSON。注意:一个类别有多个产品详细信息。这意味着特定 CATEGORY_ID 的 PRODUCT_ID、PRODUCT_NAME 和 UNIT_COST 将重复多次。

我尝试过的 JavaScript 代码

var product =   '{"products_list":' +
                '[' + 
                    '{' + 
                        '{"category_id":"A"},' +
                        '{"product_details":' + 
                            '[' + 
                                '{"product_id":"A.1","product_name":"AAAA1111", "unit_cost":"A1"},' +
                                '{"product_id":"A.2","product_name":"AAAA2222", "unit_cost":"A2"},' +
                                '{"product_id":"A.3","product_name":"AAAA3333", "unit_cost":"A3"},' +
                                '{"product_id":"A.4","product_name":"AAAA4444", "unit_cost":"A4"},' +
                                '{"product_id":"A.5","product_name":"AAAA5555", "unit_cost":"A5"},' +
                                '{"product_id":"A.6","product_name":"AAAA6666", "unit_cost":"A6"},' +
                                '{"product_id":"A.7","product_name":"AAAA7777", "unit_cost":"A7"},' +
                                '{"product_id":"A.8","product_name":"AAAA8888", "unit_cost":"A8"},' +
                                '{"product_id":"A.9","product_name":"AAAA9999", "unit_cost":"A9"},' +
                                '{"product_id":"A.0","product_name":"AAAA0000", "unit_cost":"A0"}' +
                            ']' + 
                        '}' + 
                    '},' + 
                    '{' + 
                        '{"category_id":"A"},' +
                        '{"product_details":' + 
                            '[' + 
                                '{"product_id":"A.1","product_name":"AAAA1111", "unit_cost":"A1"},' +
                                '{"product_id":"A.2","product_name":"AAAA2222", "unit_cost":"A2"},' +
                                '{"product_id":"A.3","product_name":"AAAA3333", "unit_cost":"A3"},' +
                                '{"product_id":"A.4","product_name":"AAAA4444", "unit_cost":"A4"},' +
                                '{"product_id":"A.5","product_name":"AAAA5555", "unit_cost":"A5"},' +
                                '{"product_id":"A.6","product_name":"AAAA6666", "unit_cost":"A6"},' +
                                '{"product_id":"A.7","product_name":"AAAA7777", "unit_cost":"A7"},' +
                                '{"product_id":"A.8","product_name":"AAAA8888", "unit_cost":"A8"},' +
                                '{"product_id":"A.9","product_name":"AAAA9999", "unit_cost":"A9"},' +
                                '{"product_id":"A.0","product_name":"AAAA0000", "unit_cost":"A0"}' +
                            ']' + 
                        '}' + 
                    '}' + 
                ']' + 
            '}';

Answer 1

使用 HTML 树，您将获得 PRODUCT_LIST 的以下 JSON 表示形式:

[
   {
      "CATEGORY_ID":"A",
      "PRODUCT_DETAILS":[
         {
            "PRODUCT_ID":"A.1",
            "PRODUCT_NAME":"AAAA1111",
            "UNIT_COST":0.1
         }
      ]
   },
   {
      "CATEGORY_ID":"B",
      "PRODUCT_DETAILS":[
         {
            "PRODUCT_ID":"B.1",
            "PRODUCT_NAME":"BBBBB1111",
            "UNIT_COST":0.2
         }
      ]
   }
]

<小时/>

但是，您的 JavaScript 会生成一个几乎有效的 JSON 字符串，该字符串被分配给 product 变量。您可以使用 JSON.parse()就可以了，但是太复杂了。作为JavaScriptObjectNotation是 Javascript 的子集 object literal syntax ，您应该直接分配对象。

在 JSON 中，类别对象周围有太多大括号。您可以检查一下，例如与 http://jsonformatter.curiousconcept.com/ 。更正的脚本:

var product = {
   "products_list":[
      {
         "category_id":"A",
         "product_details":[
            {
               "product_id":"A.1",
               "product_name":"AAAA1111",
               "unit_cost":"A1"
            },
            {
               "product_id":"A.2",
               "product_name":"AAAA2222",
               "unit_cost":"A2"
            },
            {
               "product_id":"A.3",
               "product_name":"AAAA3333",
               "unit_cost":"A3"
            },
            {
               "product_id":"A.4",
               "product_name":"AAAA4444",
               "unit_cost":"A4"
            },
            {
               "product_id":"A.5",
               "product_name":"AAAA5555",
               "unit_cost":"A5"
            },
            {
               "product_id":"A.6",
               "product_name":"AAAA6666",
               "unit_cost":"A6"
            },
            {
               "product_id":"A.7",
               "product_name":"AAAA7777",
               "unit_cost":"A7"
            },
            {
               "product_id":"A.8",
               "product_name":"AAAA8888",
               "unit_cost":"A8"
            },
            {
               "product_id":"A.9",
               "product_name":"AAAA9999",
               "unit_cost":"A9"
            },
            {
               "product_id":"A.0",
               "product_name":"AAAA0000",
               "unit_cost":"A0"
            }
         ]
      },
      {
         "category_id":"A",
         "product_details":[
            {
               "product_id":"A.1",
               "product_name":"AAAA1111",
               "unit_cost":"A1"
            },
            {
               "product_id":"A.2",
               "product_name":"AAAA2222",
               "unit_cost":"A2"
            },
            {
               "product_id":"A.3",
               "product_name":"AAAA3333",
               "unit_cost":"A3"
            },
            {
               "product_id":"A.4",
               "product_name":"AAAA4444",
               "unit_cost":"A4"
            },
            {
               "product_id":"A.5",
               "product_name":"AAAA5555",
               "unit_cost":"A5"
            },
            {
               "product_id":"A.6",
               "product_name":"AAAA6666",
               "unit_cost":"A6"
            },
            {
               "product_id":"A.7",
               "product_name":"AAAA7777",
               "unit_cost":"A7"
            },
            {
               "product_id":"A.8",
               "product_name":"AAAA8888",
               "unit_cost":"A8"
            },
            {
               "product_id":"A.9",
               "product_name":"AAAA9999",
               "unit_cost":"A9"
            },
            {
               "product_id":"A.0",
               "product_name":"AAAA0000",
               "unit_cost":"A0"
            }
         ]
      }
   ]
}