MongoDB導入和導出
(1)、mongoexport導出工具
MongoDB提供了mongoexport工具，可以把一個collection導出成json格式或csv格式的文件。可以指定導出哪些數據項，也可以根據給定的條件導出數據。工具幫助信息如下：
[root@localhost bin]# ./mongoexport --help
options:
--help produce help message
-v [ --verbose ] be more verbose (include multiple times for more
verbosity e.g. -vvvvv)
-h [ --host ] arg mongo host to connect to ( /s1,s2 for sets)
--port arg server port. Can also use --host hostname:port
--ipv6 enable IPv6 support (disabled by default)
-u [ --username ] arg username
-p [ --password ] arg password
--dbpath arg directly access mongod database files in the given
path, instead of connecting to a mongod server -
needs to lock the data directory, so cannot be used
if a mongod is currently accessing the same path
--directoryperdb if dbpath specified, each db is in a separate
directory
-d [ --db ] arg database to use
-c [ --collection ] arg collection to use (some commands)
-f [ --fields ] arg comma separated list of field names e.g. -f name,age
--fieldFile arg file with fields names - 1 per line
-q [ --query ] arg query filter, as a JSON string
--csv export to csv instead of json
-o [ --out ] arg output file; if not specified, stdout is used
--jsonArray output to a json array rather than one object per
line
[root@localhost bin]#
例: E:\mydrive\Project\HouseDataManageSystem\DB\mongoDB\bin\mongoexport -h "127.0.0.1:16688" -u"username" -p "password" -d "hdms" -c "MS_Updatelog" -f "Up_id,Up_content,Up_Updatetime" -type=csv -file=d:\MS_UpdateLog.csv
如需導入數據,則用mongoimport命令
