一、问题描述

使用 JSON.parse 反序列化，出现数据丢失现象。

字符串json数据：

{"varImageList": [{"variationValue": "Black ","imageList": [{"variationValue": "Black ","image_base64": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAB/20210713_11ca63ca7457a70070587ee7f2b30e1b.jpg","image_url": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAB/20210713_11ca63ca7457a70070587ee7f2b30e1b.jpg","imageAddress": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAB/20210713_11ca63ca7457a70070587ee7f2b30e1b.jpg","image_address": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAB/20210713_11ca63ca7457a70070587ee7f2b30e1b.jpg","type": "image/jpeg"}]},{"variationValue": "Gray ","imageList": [{"variationValue": "Gray ","image_base64": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/20211124_4559fbad3a4e4b5c3a8b2383135334a6.jpg","image_url": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/20211124_4559fbad3a4e4b5c3a8b2383135334a6.jpg","imageAddress": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/20211124_4559fbad3a4e4b5c3a8b2383135334a6.jpg","image_address": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/20211124_4559fbad3a4e4b5c3a8b2383135334a6.jpg","type": "image/jpeg"}]},{"variationValue": "Brown ","imageList": [{"variationValue": "Brown ","image_base64": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAR/20210713_885a0dd07f764f10f8d4e565db4f215d.jpg","image_url": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAR/20210713_885a0dd07f764f10f8d4e565db4f215d.jpg","imageAddress": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAR/20210713_885a0dd07f764f10f8d4e565db4f215d.jpg","image_address": "https://b2bfiles1.gigab2b.cn/image/wkseller/8658/WF212761AAR/20210713_885a0dd07f764f10f8d4e565db4f215d.jpg","type": "image/jpeg"}]}]
}

JSON.parse 序列化后结果：

{"varImageList": [{"variationValue": "Black","imageList": []},{"variationValue": "Gray","imageList": []},{"variationValue": "Brown","imageList": []}]
}

imageList 数据丢失。

使用 eval 反序列化，数据正常；

var json = eval('(' + strJson + ')'); 

二、产生原因

这是因为  JSON.parse 对 json字符串数据要求比较严格。像上面数据丢失原因，就是因为属性值后缀有空字符导致的。使用 trim() 方法去除两边空字符即可；