JAVASCRIPT

import data to mongodb

mongoimport --jsonArray --db YourDatabase --collection YourCollection --file Yourfile.json

import and export data in mongodb

1) mongodump (export)
    all database
       $ mongodump
     single database
       $ mongodump -d databaseName
     single collection
       $ mongodump -d databasename -c collectionName

2) mongorestore (import)
     mongorestore -d databaseName /path/
     mongorestore -d databaseName -c collectionName

import data in mongo

mongorestore -d <database_name> <directory_backup>