所有字段为空的话不传

let flag = false
for (var key in sfUserStr) {
    console.log("key"+key)
    console.log(sfUserStr);
    if (sfUserStr[key] != null && sfUserStr[key] != '') {
        flag = true
        break
    }
}
if (flag){
    obj['sfUserStrs' + num].push(sfUserStr)
}