JavaScript 获取表格数据并封装成json格式的数据

问题遇到的现象和发生背景

前端的一个表格,里面有数据库查询出来的数据,需要把选中的一行数据封装成json格式的数据

问题相关代码，请勿粘贴截图

封装格式如下:

{
    "REQUEST":{
        "HEAD":{
            "TRANSACTIONID":"",
            "COUNT":"1",
            "CONSUMER":"",
            "SRVLEVEL":"1",
            "ACCOUNT":"",
            "PASSWORD":"",
            "COMPANY":""
        },
        "DATA":{
            "ITEM":[
                {
                    "ZID":"",
                    "MATNR":"",
                    "WERKS":"",
                    "AENNR":"",
                    "AETXT":"",
                    "DATUS":"",
                    "ITEMS":[
                        {
                            "ZWYBS":"",
                           "IDNRK":"",
                           "MENGE":"",
                           "AUSCH":"",
                           "POTX1":"",
                           "POXT2":"",
                           "DEPLINE":"",
                           "SORTF":"",
                           "ZCZZT":"",
                           "ZYL01":"",
                           "ZYL02":"",
                           "ZYL03":"",
                          "ZYL04":"",
                           "ZYL05":"",
                           "ZYL06":""
                        },
                        {
                          "ZWYBS":"",
                           "IDNRK":"",
                           "MENGE":"",
                           "AUSCH":"",
                           "POTX1":"",
                           "POXT2":"",
                           "DEPLINE":"",
                           "SORTF":"",
                           "ZCZZT":"",
                           "ZYL01":"",
                           "ZYL02":"",
                           "ZYL03":"",
                          "ZYL04":"",
                           "ZYL05":"",
                           "ZYL06":""
                        }
                    ]
                }
            ]
        }
    }
}
 

运行结果及报错内容

我的解答思路和尝试过的方法

使用过assign(),push()等方式

我想要达到的结果

把表格数据封装成json格式的数据

JSON.parse(JSON.stringify(item.row))