{“_id”:”37389873″,
“Date”:{
“name”:{“count”:”7″,
“user”: “liyang”,
}
}
}
For example, for this document stored in the database, I want to take the value of 7 in count, only take the number 7, and do not need the document. how do I implement it instead? ?
Finally, I converted the json string into a map using jackson, then stripped it layer by layer using the map, and finally returned a value