解组未知格式的JSON数据[重复]
This question already has an answer here:
My JSON is in the following format:
{
'Math':
[
{'Student1': 100.0, 'timestamp': Timestamp('2017-06-26 15:30:00'), 'Student2': 100.0, 'Student3': 97.058823442402414},
{'Student1': 93.877550824911907, 'timestamp': Timestamp('2017-06-26 15:31:00'), 'Student2': 100.0, 'Student5': 100.0},
{'Student8': 100.0, 'timestamp': Timestamp('2017-06-26 15:32:00'), 'Student10': 100.0, 'Student4': 100.0}
],
'English': [
{'Student1': 100.0, 'timestamp': Timestamp('2017-06-26 15:30:00'), 'Student5': 100.0, 'Student3': 97.058823442402414},
{'Student1': 93.877550824911907, 'timestamp': Timestamp('2017-06-26 15:31:00'), 'Student2': 100.0, 'Student5': 100.0},
{'Student8': 100.0, 'timestamp': Timestamp('2017-06-26 15:32:00'), 'Student10': 100.0, 'Student4': 100.0}
]
}
The keys are completely unknown to me. All I know is that the JSON will be of the format:
{
SUBJECT1: [{Student_Name1: Grade, Student_Name2: Grade, ... , Student_Name3: Grade, timestamp: Timestamp(...)}],
SUBJECT2: [{Student_Name4: Grade, Student_Name6: Grade, ... , Student_Name5: Grade, timestamp: Timestamp(...)}]
...
SUBJECTN: [{Student_Name1: Grade, Student_Name6: Grade, ... , Student_Name9: Grade, timestamp: Timestamp(...)}]
}
where the subjects
, student_names
are all unknown and could vary.
I want to unmarshal this into a GoLang struct so I can return it to my front-end as a JSON object. What should my struct look like? This is what I tried, but it didn't work.
type GradeData struct {
Grades map[string]interface{} `json:"-"`
}
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此问题已经存在 在这里有答案: p>
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使用未知字段解组JSON [重复]
7个答案
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我的JSON格式如下: p>
{ 'Math': [ {'Student1':100.0,'timestamp':Timestamp('2017-06-26 15:30:00'),'Student2':100.0,'Student3':97.058823442402414 }, {'Student1':93.877550824911907,'timestamp':Timestamp('2017-06-26 15:31:00'),'Student2':100.0,'Student5':100.0}, {'Student8' :100.0,'timestamp':Timestamp('2017-06-26 15:32:00'),'Student10':100.0,'Student4':100.0} ], '英语':[ {' 学生1:100.0,“时间戳”:时间戳 amp('2017-06-26 15:30:00'),'Student5':100.0,'Student3':97.058823442402414}, {'Student1':93.877550824911907,'timestamp':Timestamp('2017-06-26 15:31:00'),'Student2':100.0,'Student5':100.0}, {'Student8':100.0,'timestamp':Timestamp('2017-06-26 15:32:00'), 'Student10':100.0,'Student4':100.0} ] } code> pre>
这些键对我来说完全是未知的。 我只知道JSON的格式为: p>
{ SUBJECT1:[{Student_Name1:Grade,Student_Name2:Grade,...,Student_Name3:Grade,timestamp :Timestamp(...)}], SUBJECT2:[{Student_Name4:成绩,Student_Name6:成绩,...,Student_Name5:成绩,时间戳:Timestamp(...)}] ... SUBJECTN:[ {Student_Name1:成绩,Student_Name6:成绩,...,Student_Name9:成绩,时间戳:Timestamp(...)}] } code> pre>
code> subjects code>,
student_names code>都是未知的,可能会有所不同。 p>
我想将其解组为GoLang结构,以便可以将其作为JSON对象返回到我的前端。 我的结构应该是什么样的? 这是我尝试过的方法,但是没有用。 p>
类型GradeData结构{ Grades map [string] interface {}`json:“-”` } code> pre> DIV>
- If you don't know the keys, you can use
map[string]interface{}
to unmarshal your JSON payload. - If you use
json:"-"
tag for thestruct
fields, those fields will be ignored during JSON Marshal/Unmarshal.
You can try following options: Go Playground link
Option 1:
var grades map[string]interface{}
err := json.Unmarshal([]byte(jsonString), &grades)
fmt.Println(err)
fmt.Printf("%#v
", grades)
Option 2: if you want have struct
var gradesData GradeData
err := json.Unmarshal([]byte(jsonString), &gradesData.Grades)
fmt.Println(err)
fmt.Printf("%#v
", gradesData)