如何在Golang中访问嵌套的Json键值 [英] how to access nested Json key values in Golang
问题描述
团队,编程新手.如下图所示对Json进行编组后,我有可用数据,该数据具有嵌套的Key值.我可以访问的固定键值,如何访问嵌套键值.这是在拆封后显示的字节切片数据—>
Team, new to Programming. I have data available after unmarshaling the Json as shown below, which has nested Key values. flat key values I am able to access, how do I access nested key values. Here is the byte slice data shown below after unmarshaling —>
tables:[map[name:basic__snatpool_members] map[name:net__snatpool_members] map[name:optimizations__hosts] map[columnNames:[name] name:pool__hosts rows:[map[row:[ry.hj.com]]]] traffic_group:/Common/traffic-group-1
我可以使用以下代码访问平键值
Flat key values I am able to access by using the following code
p.TrafficGroup = m["traffic_group"].(string)
这是完整的功能
func dataToIapp(name string, d *schema.ResourceData) bigip.Iapp {
var p bigip.Iapp
var obj interface{}
jsonblob := []byte(d.Get("jsonfile").(string))
err := json.Unmarshal(jsonblob, &obj)
if err != nil {
fmt.Println("error", err)
}
m := obj.(map[string]interface{}) // Important: to access property
p.Name = m["name"].(string)
p.Partition = m["partition"].(string)
p.InheritedDevicegroup = m["inherited_devicegroup"].(string)
}
推荐答案
注意:这可能不适用于您的JSON结构.我根据您的问题推断出它将是什么,但是如果没有实际的结构,我不能保证它无需修改即可工作.
Note: This may not work with your JSON structure. I inferred what it would be based on your question but without the actual structure, I cannot guarantee this to work without modification.
如果要在映射中访问它们,则需要断言从第一个映射拉出的接口实际上是一个映射.因此,您需要执行以下操作:
If you want to access them in a map, you need to assert that the interface pulled from the first map is actually a map. So you would need to do this:
tmp := m["tables"]
tables, ok := tmp.(map[string]string)
if !ok {
//error handling here
}
r.Name = tables["name"].(string)
但是,为什么不创建与JSON输出匹配的结构,而不是将未编组的JSON作为 map [string] interface {}
来访问?
But instead of accessing the unmarshaled JSON as a map[string]interface{}
, why don't you create structs that match your JSON output?
type JSONRoot struct {
Name string `json:"name"`
Partition string `json:"partition"`
InheritedDevicegroup string `json:"inherited_devicegroup"`
Tables map[string]string `json:"tables"` //Ideally, this would be a map of structs
}
然后在您的代码中:
func dataToIapp(name string, d *schema.ResourceData) bigip.Iapp {
var p bigip.Iapp
var obj &JSONRoot{}
jsonblob := []byte(d.Get("jsonfile").(string))
err := json.Unmarshal(jsonblob, &obj)
if err != nil {
fmt.Println("error", err)
}
p.Name = obj.Name
p.Partition = obj.Partition
p.InheritedDevicegroup = obj.InheritedDevicegroup
p.Name = obj.Tables["name"]
}
这篇关于如何在Golang中访问嵌套的Json键值的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!