mongodb oid

In the past, MySQL databases were used to write a large pile of SQL statements all day long. It took several days to remember these SQL keywords, and all the SQL keywords were written. When MongoDB was exposed, I found that I don't need to write SQL

Used MySQL database, the whole day is to write a large heap of SQL statements, to remember that these SQL keywords are going to take a few days, write the eggs are exploded, when the contact to MongoDB, found not to write SQL, instantly feel tall on,

First, MongoDB Introduction MongoDB is a cross-platform, document-oriented database that enables high performance, high availability, and easy scaling. MongoDB is written by the C + + language and is an open source database system based on

Once with MySQL database, all day is to write a large heap of SQL statements. To remember that these sqlkeyword are going to take a few days, write the eggs have exploded, when the contact with MongoDB, found not to write SQL, instantly think tall,

Connect to MongoDB using Java Package mymaven; import java.net. unknownHostException; import java. util. set; import com. mongodb. basicDBObject; import com. mongodb. DB; import com. mongodb. DBCollection; import com. mongodb. DBCursor; import com.

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

Summary:1. [MongoDB] Installing MongoDB2. [Mongodb]mongo Basic use:3. [Advantages and disadvantages of mongodb]mongodb and comparison with relational database4. [Mongodb]mongodb and Java use crud togetherIt is also fairly simple to use, because

In the previous article, we talked about the MongoDB command entry. This blog will create a simple JavaMongoDBCRUDExample based on the database and table created in the previous blog, and connect to the MongoDB database using Java, it also

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

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,