Java Mongodb Delete Example

1. Create a Maven project and add below dependency in pom.xml

   <dependency>
      <groupId>org.mongodb</groupId>
      <artifactId>mongo-java-driver</artifactId>
      <version>3.1.1</version>
     </dependency>
   

2. Create a Java class to Delete data

   package com.vinod.examples;
   
   import com.mongodb.BasicDBObject;
   import com.mongodb.DB;
   import com.mongodb.DBCollection;
   import com.mongodb.DBCursor;
   import com.mongodb.Mongo;
   import com.mongodb.MongoException;
   
   public class MongoDeleteExample {
   
      public static void main(String[] args) {
         try {
            System.out.println("MongodbDeleteDocument example...");
            // Creating mongoinstance
            Mongo mongo = new Mongo("localhost", 27017);
            // Creating database instance
            DB db = mongo.getDB("vinodDB");
   
            // Creating collection object
            DBCollection collection = db.getCollection("pretechUpdate1");
   
            // BasicDBObject helpful create docuent object
            // Creating contact object
            BasicDBObject contact = new BasicDBObject();
            contact.put("name", "vinod");
            contact.put("address", "bangalore");
            // Creating phone number object
            BasicDBObject phoneNumber = new BasicDBObject();
            phoneNumber.put("cell", "9999999999");
            phoneNumber.put("landline", "08099999999");
            phoneNumber.put("fax", "08099999990");
   
            // adding phone number object in to contact object
            contact.put("Phone numbers", phoneNumber);
            // Inserting document
            collection.insert(contact);
   
            // Retrieving collection details
            DBCursor cursorDoc = collection.find();
            while (cursorDoc.hasNext()) {
               System.out.println("Address details " + cursorDoc.next());
            }
            // Removing documents
   
            collection.remove(new BasicDBObject().append("name", "vinod"));
            // Retrieving collection details
            DBCursor newcursorDoc = collection.find();
            System.out.println("No of records exists" + newcursorDoc.count());
            System.out.println("End of program");
         } catch (MongoException e) {
            e.printStackTrace();
         }
      }
   
   }
   

3. Output

   Address details { "_id" : { "$oid" : "568e2548f5d3c83573a09bd1"} , "name" : "vinod" , "address" : "bangalore" , 
   "Phone numbers" : { "cell" : "9999999999" , "landline" : "08099999999" 
   , "fax" : "08099999990"}}
   No of records exists0
   End of program
   

   Done !!!