mongodb find example java

Java Implementation of mongodb dbutils Mongodb is used up, but it is uncomfortable to call the find method to return the data returned by the operation. I used commons-dbutils for java database operations, you can encapsulate the data returned by

Recently, nosql databases are very popular, so I started to learn MongoDB with the attitude of keeping pace with the times. The best way to learn is to manually make an instance, so I chose the frequently used tree structure as an example for getting started. In this example, the tree structure is constructed based on the full path method recommended by tree in

EMP, now need to query out the sales order by time period, and the EMP with the left connection, and finally show in the report. Some of the source data are as follows: Collection Sales Collectionemp The Collector script: A1=mongodb ("Mongo://localhost:27017/test?user=rootpassword=sa") The code above is used to create a database connection for MongoDB, and user and password are available to specify t

Original address: http://keben1983.blog.163.com/blog/static/143638081201010591157929/ This document is translated from the [mongodb-docs-2010-10-24.pdf] [Java Language Center] section of the document and is organized according to your own understanding. Hope to give a friend like me to start contact a little help, but also make a memo, because is just learning, many of these features are currently not us

PHP operation MongoDB Instance analysis, phpmongodb instance analysis This article explains how to manipulate MongoDB in PHP. Share to everyone for your reference. The specific analysis is as follows: MongoDB database is a database stored in JSON format, very suitable for a variety of application development, here to give friends to introduce some

Collector script:A1=mongodb ("Mongo://localhost:27017/test?user=rootpassword=sa")The code above is used to create a database connection for MongoDB, and user and password are available to specify the username and password.The collector also supports using JDBC to connect MongoDB, as with normal databases, but because third-party JDBC functions are not as good as

logically equivalent to a foreign key and points to the EId field of emp. Now you need to query orders in sales by time period, connect to emp and display it in the report. Some source data is as follows: Collection sales Collectionemp Set the compute script: A1 = MongoDB ("mongo: // localhost: 27017/test? User = root password = sa ") The above code is used to create a MongoDB database connection. use

Detailed descriptions of php and mongoDB operation examples. MongoDB is a database stored in json format and is very suitable for various application development. let me introduce some mongoDB learning instances to you. To integrate PHP, mongodb database is a database stored in json format. it is very suitable for vari

: {"_ Id": "49903677516250c1008d624e", "I": 71, "_ ns": "testcollection "} 13. query the document set Based on the query conditions, we can use dbcollection to retrieve multiple objects from the database, such as querying the document set of I> 50: Query = new basicdbobject (); Query. Put ("I", new basicdbobject ("$ gt", 50); // I> 50 Cursor = Coll. Find (query ); While (cursor. hasnext ()){Dbobject object = cursor. Next ();System. Out. println (objec

db = Mongoclient.getdb ("MyDB");2. Mode two: MongoclienturiYou can also use the MongoClientURI credentials to complete MongoDB, which represents a URI object. MongoClientURI's constructor accepts a string of type strings, the format of which is as follows:Mongodb://[username:[email protected]]host1[:p ort1][,host2[:p Ort2],... [, hostn[:p Ortn]] [/[database][?options]]The resulting MongoClientURI object is used as a MongoClient constructor parameter,

Tags: php operation MongoDB Database additions and deletionsPHP Operation MongoDB:PHP needs to play modules to manipulate MongoDBOfficial website can be downloaded: Http://pecl.php.net/package/mongo downloadMongoDB is set to user-authorized startup modeThe PHP manual does not have the user authorization method to log in:conn.php$conn = new Mongo ("Mongodb://user1:[email protected]:27017/test"); User Authori

(credential)); DB db = mongoClient.getDB("mydb");Way two: MongoclienturiYou can also use the MongoClientURI credentials to complete MongoDB, which represents a URI object. MongoClientURI's constructor accepts a string of type strings, the format of which is as follows: Mongodb://[username:[email protected]]host1[:p ort1][,host2[:p Ort2],... [, hostn[:p Ortn]] [/[database][?options]] The resul

, anyway, the goods also have a very strong place, the disadvantage is not suitable forDataConsistencyHigh demand, such as financial development. But the advantage iscome on .Summary: This means that node and MongoDB combine to be particularly suitable for a scenario- fast, high -throughput situations. Let's start with the preparatory work: (Take the windows8.1 system environment as an example) 1.node:

information equal to California. A query condition expression can be passed as a parameter to a esproc, such as: Esproc does not contain MongoDB's Java driver package. To access MongoDB with Esproc, the MongoDB Java driver package (Esproc requires 2.12.2 or more versions of driver, Mongo-

. insert (BO ); PermissionIf you have MongoDB access permissions, true is returned. Otherwise, false is returned.Boolean auth = dB. Authenticate (myusername, mypassword ); View MongoDB database listMongo M = new Mongo ();For (string S: M. getdatabasenames ()){System. Out. println (s );} View all the table names in the current database. It is equivalent to executing show tables in

({"Count": {$gt: 5}}, {$set: {"Test5": "OK"}},true,true); All records greater than 5 are added. Query Copy Code code as follows: Db.collection.find (Array (' name ' => ' bailing '), array (' email ' => ' email@qq.com ')) Db.collection.findOne (Array (' name ' => ' bailing '), array (' email ' ' email@qq.com ')) We can see the query I used two different ways of writing, this is why, in fact, this is the same as cooking, put different spices, fried dishes are diff

** @ param find * queryer * @ param update * Updater * @ param upsert * update or insert * @ param multi * batch update * @ param collName * Set name * @ return returns the number of affected data entries */public int update (DBObject find, DBObject update, boolean upsert, boolean multi, String collName) {DBCollection coll = db. getCollection (collName); int count = coll. update (

list is a string that calculates the similarity of the two adjacent elements in the list.# find the similarity between adjacent strings in the Chats list def compute_similar (): = uid_chats () for in range (len (chats)-1): = Similar_ratio (chats[index ], chats[index+1]) print(ratios)A specific string similarity calculation, implemented by Sequencematcher, ignores the presence of spaces in a string.# The lambda expression means ig

);foreach ($result as $id = = $value) {Var_dump ($value);}$param = Array ("auther" = = Array (' $in ' =>array (New Mongoregex ('/^ Lee/'), New Mongoregex ('/^ money/')));$result = $collection->find ($param);foreach ($result as $id = = $value) {Var_dump ($value);}9. $orCopy CodeThe code is as follows:> Db.books.find ({$or: [{money:20}, {money:80}]}); Find Money equals 20, 80 of data{"_id": 1, "title": "Red M

"}}{"_ Id": ObjectId ("4dd7d214b2d55d5e1db1bb99"), "userId": "10010178", "userName": "Bill Tu8", "gender": "m8 ", "age": 8, "rank": [8, 8, 8], "interests ":{"Game": "game8", "ball": "ball8", "other": "nothing8 "}}{"_ Id": ObjectId ("4dd7d214b2d55d5e1db1bb9a"), "userId": "10010179", "userName": "Bill Tu9", "gender": "m9 ", "age": 9, "rank": [9, 9, 9], "interests ":{"Game": "game9", "ball": "ball9", "other": "nothing9 "}}{"_ Id": ObjectId ("4dd7d214b2d55d5e1db1bb9b"), "userId": "100101710", "user