- Java & MongoDB Tutorial
- Java & MongoDB - Home
- Java & MongoDB - Overview
- Java & MongoDB - Environment Setup
- Java & MongoDB Examples
- Java & MongoDB - Connect Database
- Java & MongoDB - Show Databases
- Java & MongoDB - Drop Database
- Java & MongoDB - Create Collection
- Java & MongoDB - Drop Collection
- Java & MongoDB - Display Collections
- Java & MongoDB - Insert Document
- Java & MongoDB - Select Document
- Java & MongoDB - Update Document
- Java & MongoDB - Delete Document
- Java & MongoDB - Embedded Documents
- Java & MongoDB - Referenced Documents
- Java & MongoDB - Limiting Records
- Java & MongoDB - Sorting Records
- Java & MongoDB Useful Resources
- Java & MongoDB - Quick Guide
- Java & MongoDB - Useful Resources
- Java & MongoDB - Discussion
Java & MongoDB - Connecting Database
To connect database, you need to specify the database name, if the database doesn't exist then MongoDB creates it automatically.
MongoDatabase database = mongo.getDatabase("myDb");
Example
Following is the code snippet to connect to the database −
import com.mongodb.MongoCredential; import com.mongodb.client.MongoClient; import com.mongodb.client.MongoClients; import com.mongodb.client.MongoDatabase; public class Tester { public static void main(String[] args) { // Creating a Mongo client MongoClient mongoClient = MongoClients.create("mongodb://localhost:27017"); MongoDatabase database = mongo.getDatabase("myDb"); // Creating Credentials MongoCredential credential; credential = MongoCredential.createCredential("sampleUser", "myDb", "password".toCharArray()); System.out.println("Credentials ::"+ credential); } }
Now, let's compile and run the above program as shown below.
$javac Tester.java $java Tester
Output
On executing, the above program gives you the following output.
Credentials ::MongoCredential{mechanism=null, userName='sampleUser', source='myDb', password=<hidden>, mechanismProperties=<hidden>}
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