mongodb find example java

Tags: style blog http io os ar java for SPJava Operation MySQL Database code we have a very familiar, and additions and deletions, Java to the MongoDB database is similar to the operation, first database connection, and then the operation.First we enter into the admin database, and then set up their own database Testmongodb, access to the admin database, you can

In the previous article, we talked about MongoDB's command to get started, this blog will be based on the previous blog created database and table completed a simple Java MongoDB CRUD Example, using Java to connect MongoDB database. and implement routines such as creating a

In the previous article we talked about MongoDB's command to get started, this blog will be based on the database and table established in the previous blog to complete a simple Java MongoDB CRUD Example, the use of Java to connect MongoDB database, and the implementation of

:561baace3aea5b925fddc83cTitle: A good successor to socialismContent: Good study, Day day upFansunionDate: Mon Oct 2015 20:42:54 CSTId:1-----------------------Built-in id:561baace3aea5b925fddc83dTitle: A good capitalist grave diggerContent: Work hard, always upFansunionDate: Mon Oct 2015 20:42:54 CSTId:2-----------------------Change the author of the article titled HelloWorld to Ray and modify only AUTHOR1 fieldsBuilt-in id:561baace3aea5b925fddc83cTitle: A good successor to socialismContent: Goo

);Dbcursor queryallcursor = City.find ();while (Querycursor.hasnext ()) {SYSTEM.OUT.PRINTLN ("Read Condition Data:" +querycursor.hashcode () + "ReadValue:" + querycursor.next ());}while (Queryallcursor.hasnext ()) {System.out.println ("Read All Data:" +queryallcursor.hashcode () + "ReadValue:" + queryallcursor.next ());}System.out.println ("Read data success~");/*** Modify Data*/One method (this is more powerful!) )Basicdbobject needmodifydata = new Basicdbobject ();Needmodifydata.put ("CID", "c

Data* @param find Finder* @param Update Updater* @param upsert Update or insert* @param multi whether batch update* @param collname Collection name* @return Returns the number of data bars affected*/public int update (DBObject find,DBObject Update,Boolean Upsert,Boolean Multi,String collname) {1. Get the collectionDbcollection coll = db.getcollection (collname);int count = coll.update (

1 ImportJava.util.HashMap;2 ImportJava.util.Map;3 ImportJava.util.Map.Entry;4 //in a positive integer less than 99999, find the number that meets the following criteria, which is both a full square number,5 //another two digits are the same, such as: 144,676. 6 Public classWQS {7 8 //Total Square Number9 Public Static BooleanIswqs (intN) {Ten inti; One Doubledn=math.sqrt (n); A if(Dn-(int) dn==0) - ret

Previous article: Http://www.cnblogs.com/hoojo/archive/2011/06/01/2066426.html introduced to the MONGODB console to complete the data manipulation of MongoDB, We have a comprehensive understanding and understanding of MongoDB through the previous article. Now we're going to use Java to manipulate

1. specify the returned key db. [documentName]. find ({condition}, {key specified}) data preparation persons. jsonvarpersons [{name: jim, age: 25, email: 75431457@qq.com, c: 89, m: 96, e: 87, country: USA, books: [JS, C, EXTJS, MONGODB]}, {name: tom, age: 25, email: 214557457@qq.com, c 1. specify the returned key db. [documentName]. find ({condition}, {key specif

. MongoDBfor Java API documentation address: http://api.mongodb.org/java/2.6.5/ MongoDB for Java related operation instance code: http://docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/ I created a Maven project. The pom file is as follows: If

Development environment:System:windowsIde:eclipse, MyEclipse 8Database:mongodbDeveloping dependent libraries:JavaEE5, Mongo-2.5.3.jar, Junit-4.8.2.jarEmail:[email protected]Blog:http://blog.csdn.net/ibm_hoojohttp://hoojo.cnblogs.com/First, the preparatory work1. First, download MongoDB support for Java driver packageDrive Pack: Https://github.com/mongodb/mongo-

Query the embedded document and query the normal document is exactly the same;For example:>db.post.find () { "_id" :objectid ("54ace1394ba07ed75df68f90"), "Name" :{ "FirstName" : "Joe", "LastName" : "Schome" }, " Age ":28}{" _id ":objectid (" 54ace14a4ba07ed75df68f91 " ), "name" :{ "FirstName" : "snail", "LastName" : "Yu" NBSP;}, "Age" :29}{ "_id" :objectid (" 54ace18d4ba07ed75df68f92 ")," name ":{" FirstName ":" Sunny "," LastName " : "WU" }, "Age"

This article mainly introduces Java operation MongoDB. Development environment: System:windows Ide:eclipse, MyEclipse 8 Database:mongodb To develop a dependent library: JavaEE5, Mongo-2.5.3.jar, Junit-4.8.2.jar First, preparatory work 1, first of all, download the MongoDB Java-supported driver package Driver p

the previous large list of errors or people looking uncomfortable, we want to destroy them.Error:cannot Find module '. /build/release/bson ' Solution{[Error:cannot find module '. /build/release/bson '] Code: ' Module_not_found ' }js-bson:failed to load C + + Bson extension, using pure JS versionThe first two lines say that no Bson module was found. Okay, we'll install it right away:NPM Install BsonThen the

API document address is: HTTP://API.MONGODB.ORG/JAVA/2.6.5/ MongoDB for Java related Operation instance code: http://docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/ I'm creating a MAVEN project with the following POM files: If your development environment does not have a MAVEN envi

and nosql As a nosql solution, MongoDB is easy to use. During my first in-depth research on nosql databases, I tried a lot of Java-based solutions and found out what column family is) what is the relationship between hadoop and hbase, and what is zookeeper very time-consuming. When I finally want to understand these problems, I realized that Cassandra, hbase, and other products are all very well-developed

db.dept.distinct("dname") Sort//按dname降序排列 db.dept.find().sort({"dname":-1}) //按dname升序排列 db.dept.find().sort({"dname":1}) Page out//获取前5条记录 db.dept.find().limit(5) //跳过5条再取5条(取6-10) db.dept.find().skip(5).limit(5) Indexdb.dept.ensureIndex({"dname":1}) db.dept.dropIndexes() db.dept.find({"dname":"java99999"}).explain("executionStats") Java access MongoDB based on Mongo-

MongoDB official Java driver, save and read, the need is DBObject object, this is an interface, implement Put,get and other methods, similar to map, if we want to directly save ordinary Java objects to MongoDB, You need to convert to dbobject objects, or directly implement the DBObject interface, which is very complex

Original address: http://blog.csdn.net/drifterj/article/details/7948090Directory Address: HTTP://BLOG.CSDN.NET/DRIFTERJ/ARTICLE/CATEGORY/1191327/2In the front we all manipulate the data accessing MongoDB through the shell, the language used in the shell is JavaScript. Let's talk about how to access the MongoDB database through Java.The Java driver is the earliest

communication with the database.Dbcollection coll = db.getcollection ("Collection1");To get a "show tables" feature like MySQL, you can use the following code:SetMongoDB stores the JSON-formatted document, and the simplest class in Java that represents this data format is map. The basicdbobject provided in MongoDB Java driver is a map (which inherits from the Li