Welcome reprint, Reproduced please indicate the source.ProfileThis article briefly describes how to use Spark-cassandra-connector to import a JSON file into the Cassandra database, a comprehensive example that uses spark.Pre-conditionsSuppose you have read the 3 of technical combat and installed the following software
Jdk
Scala
SBt
Cassandra
Spark-cassandra-connector
Experiment
To enable the program to Run, the Json-lib package must be introduced, and the Json-lib package relies on the following jar packages:1.commons-lang.jar2.commons-beanutils.jar3.commons-collections.jar4.commons-logging.jar5.ezmorph.jar6.json-lib-2.2.2-jdk15.jarSecond, Jsonobject object useThe Json-lib package is a beans,
Tags: div file info log row The var online edit CTSRecently, it's time to start using MongoDB to store JSON model files, and then you can implement online editing and management of model files. This morning implemented the JSON file storage code, as follows:varFs=require ("FS"); varMongoclient = require (' MongoDB ').
builder.create (). Show (); + } the } - $ the the the //import File the Private voidIntroduction () { - /* in the */ the Try { About theFile Urlfile =NewFile (environment.getexternalstoragedirectory () the+ "/hello.txt"); theInputStreamReader ISR =NewInputStreamReader (NewFileInputStream ( +Urlfile), "UTF-8"); -BufferedReader br =NewB
From Pymongo import mongoclientFrom Bson.objectid import ObjectidImport JSONdef read (data, find):# set to read the file in Utf-8 decoding mode, encoding parameter must be set, otherwise the default in GBK mode to read the file, when the file contains Chinese, will errorf = open (data, encoding= ' Utf-8 ')setting = Json.load (f)# Note The read syntax for multiple structures# family = setting[' basesettings
First, the front page:Valuefield: ' id ', TextField: ' NAME '" style= "width: 170px;height:25px; " />Second, JS code:$.ajax ({url:basectx+ "/actions/getlistinfo.action",//Get list data in the database that contains the ID and name fieldsType: ' Post ',Async:true,DataType: "JSON",Success:function (data) {//data has JSON data about the ID and name fieldsDebuggerCall the LoadData method of the ComboBox to load
error prompting when inserting JSON file into MongoDB (my operating system is WIN10):the execution order at that time was: mongoimport-d test-c restaurants D://primer-dataset.jsonThe primer-dataset.json file is then stored in the folder and can be successfully inserted, with the following command: mongoimport-d test-c restaurants d://mongodb/ Primer-dataset.jsonT
PHP failed to import JSON data into MySQL data
First of all, let me make the following principles:
1, first convert the JSON into an array;
2, in the array of I need to be extracted from the data, composition I if the SQL statement part of the values, I extracted this part of an array;
3, because the above extracted values is an array, I use a For loop to execute
http://mp.weixin.qq.com/s?__biz=MjM5NzU0MzU0Nw==mid=401571614idx=1sn= 181f9ea7e195dc42de93a813073fdfb2scene=23srcid=1221hxfjmwajepdtcjhkkobm#rdhttp://mp.weixin.qq.com/s?__biz=MjM5NzU0MzU0Nw==mid=400760955idx=2sn= A7d7c23ca4511150c5b8f049876f7cecscene=23srcid=12092vngjfypldm6rvbl57rm#rdhttp://mp.weixin.qq.com/s?__biz=MjM5NzU0MzU0Nw==mid=400760955idx=3sn= 3f57316d240f6b058b9b0ec39392e6a3scene=23srcid=1203ggs4yglrs4b5jyctspwt#rdThis article is from the "Mr_computer" blog, make sure to keep this sou
JSON and CSVare supported, specifying that the CSV format must be exported using the- F The parameters specify the fields that need to be exported, andthe first behavior of theCSV file is the field name header. 2. Import: (1) import json file: Mongoimport-h IP--port Port- u user name - p password - d database - C
Five: MongoDB import, export, backup, restore, user authorizationOne: Data export, data importAs a DBA (administrator), you often encounter the need to import and export data, as described in the following utilities (bring-your-own):1: Data import MongoexportExport files in CSV format./mongoexport-d test-c User1-o/tmp/
; +Objectid.tryparse (Value, outID); theId =ID; - } $ } the } the the Public classmyentity3:myentity the { -[Jsonconverter (typeof(Objectidconverter))] in Public OverrideObjectId Id {Get;Set; } the } the Public classObjectidconverter:jsonconverter About { the Public Override BOOLCanconvert (Type objectType) the { the returnObjectType = =typeof(ObjectId); + } - the Public Override ObjectReadjson
Tags: mongoexport mysql utf8mb4 error 1262 (01000)Requirements: Export the MONGODB data specified field and then specify the field to import into the MySQL tableGo straight,Finally, you will encounter a few problems and solutions, so that a similar problem can be resolved quickly (the specific usage of the commands used during the period is not covered in this article)
Export the specified field of
Export in server 1/usr/local/mongodb/bin/mongorestore-d adv_new/tmp/mongodb/It then generates a adv_new directory in the/tmp/mongodb/directory that holds the data files for the Adv_new library.Import in server 2Login MONGO to create a new library/usr/local/mongodb/bin/mongo> Use adv_new; (You can create a new library d
Label: requirements: Identify the data from the MongoDB, determine if there is a cluster, if any, import this piece of data+A column cluster, if not, the data does not contain the column cluster to directly post the code: PackageTest; Importjava.util.ArrayList;ImportJava.util.Iterator;Importjava.util.List;ImportJava.util.Set; Importorg.apache.hadoop.conf.Configuration;Importorg.apache.hadoop.hbase.HBaseConf
-collection Note the place
Mongoimport before the import, the new database does not have the same XX table can be imported successfully;
Mongoexport and Mongoimport The order of each parameter input is not strict;
For a replica set, the data export of Mongoexport can be a primary node in a replica set, or it can be a secondary node;
For a replica set, the data import of Mongoimport m
MongoDB Data export, import, and index creation(1) Data Export-one file per table:# Mongoexport--db Project--collection table name--out output file name, such as:# Mongoexport--DB Project--collectionstock--out Stock.json, export all F10 data to file/root/stock.json(2) Data import-one file per table:# mongoimport--db users--collection table name--file Enter file n
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