Java Test Mongodb__java

----------------------------------------------------Java Test MongoDB the Java code to connect to the database is as follows: Import com.mongodb.MongoClient;


Import Com.mongodb.client.MongoDatabase; public class mongodbjdbc{public static void Main (String args[]) {try{//Connect to MongoDB service Mon
       
         Goclient mongoclient = new Mongoclient ("localhost", 27017);  
       Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("MyCol");
        
      System.out.println ("Connect to Database successfully");
     }catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());  
The Java code for the connection database of the account password is as follows: Import java.util.ArrayList;  
Import java.util.List;  
Import com.mongodb.MongoClient;  
Import com.mongodb.MongoCredential;  
Import com.mongodb.ServerAddress;  
  
Import Com.mongodb.client.MongoDatabase; public class Mongodbjdbc {public static void main (string[] args) {try {//Connect to MongoDB service if it is far Chenglian can replace the "localhost "for server IP address//serveraddress () two parameters for server address and port serveraddress serveraddress = new Ser  
            Veraddress ("localhost", 27017);  
            list<serveraddress> Addrs = new arraylist<serveraddress> ();  
              
            Addrs.add (serveraddress); Mongocredential.createscramsha1credential () Three parameters are user name database name password mongocredential credential = Mongocredenti  
            Al.createscramsha1credential ("username", "databaseName", "Password". ToCharArray ());  
            List<mongocredential> credentials = new arraylist<mongocredential> ();  
              
            Credentials.add (credential);  
              
            Obtain MongoDB connection Mongoclient mongoclient = new Mongoclient (addrs,credentials) through connection authentication;  
            Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("DatabaseName");  
        System.out.println ("Connect to Database successfully"); catch (Exceptione) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());
Create a collection: Import com.mongodb.MongoClient;


Import Com.mongodb.client.MongoDatabase; public class mongodbjdbc{public static void Main (String args[]) {try{//Connect to MongoDB service Mongocl
         
       
      Ient mongoclient = new Mongoclient ("localhost", 27017);  
      Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("MyCol");
      System.out.println ("Connect to Database successfully");
      Mongodatabase.createcollection ("test");
        
      System.out.println ("Collection Creation succeeded");
     }catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());
Gets the collection: import org.bson.Document;
Import com.mongodb.MongoClient;
Import com.mongodb.client.MongoCollection;


Import Com.mongodb.client.MongoDatabase;   
    public class mongodbjdbc{public static void Main (String args[]) {try{   Connect to MongoDB service mongoclient mongoclient = new Mongoclient ("localhost", 27017);  
       Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("MyCol");
      
       System.out.println ("Connect to Database successfully");
       Mongocollection<document> collection = mongodatabase.getcollection ("test");
      SYSTEM.OUT.PRINTLN ("Set Test selection succeeded");
     }catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());
Insert document import Java.util.ArrayList;
Import java.util.List;


Import org.bson.Document;
Import com.mongodb.MongoClient;
Import com.mongodb.client.MongoCollection;


Import Com.mongodb.client.MongoDatabase; public class mongodbjdbc{public static void Main (String args[]) {try{//Connect to MongoDB service M
         
         Ongoclient mongoclient = new Mongoclient ("localhost", 27017); Connect to database mongodatabase Mongodatabase = Mongoclient.getdatabASE ("MyCol");
         
         System.out.println ("Connect to Database successfully");
         Mongocollection<document> collection = mongodatabase.getcollection ("test");
         SYSTEM.OUT.PRINTLN ("Set Test selection succeeded"); Insert Document/** * 1. Create document org.bson.Document key-value format * 2. Create a Document collection List<document> * 3. Insert a document collection into a database collection Mongocollection.insertmany (list<document>) Inserts a single document can be used Mongocollection.insertone (document) * *  
         /Document document = new Document ("title", "MongoDB").  
         Append ("description", "Database").  
         Append ("likes", 100).  
         Append ("by", "Fly");  
         list<document> documents = new arraylist<document> ();  
         Documents.Add (document);  
         Collection.insertmany (documents);  
      SYSTEM.OUT.PRINTLN ("Document insert succeeded");
      }catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());
Retrieve all DocumentsImport org.bson.Document;
Import com.mongodb.MongoClient;
Import com.mongodb.client.FindIterable;
Import com.mongodb.client.MongoCollection;
Import Com.mongodb.client.MongoCursor;


Import Com.mongodb.client.MongoDatabase; public class mongodbjdbc{public static void Main (String args[]) {try{//Connect to MongoDB service M
         
         Ongoclient mongoclient = new Mongoclient ("localhost", 27017);  
         Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("MyCol");
         
         System.out.println ("Connect to Database successfully");
         Mongocollection<document> collection = mongodatabase.getcollection ("test");
         
         SYSTEM.OUT.PRINTLN ("Set Test selection succeeded"); Retrieves all documents/** * 1. Gets the iterator finditerable<document> * 2. Gets the cursor mongocursor<document> * 3.  
         A collection of retrieved documents via a cursor * */finditerable<document> finditerable = Collection.find (); Mongocursor<document> mongocursor = Finditerable.iterator ();  
         while (Mongocursor.hasnext ()) {System.out.println (Mongocursor.next ());
      }}catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());
Update the document import Org.bson.Document;
Import com.mongodb.MongoClient;
Import com.mongodb.client.FindIterable;
Import com.mongodb.client.MongoCollection;
Import Com.mongodb.client.MongoCursor;
Import Com.mongodb.client.MongoDatabase;


Import Com.mongodb.client.model.Filters; public class mongodbjdbc{public static void Main (String args[]) {try{//Connect to MongoDB service M
         
         Ongoclient mongoclient = new Mongoclient ("localhost", 27017);  
         Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("MyCol");
         
         System.out.println ("Connect to Database successfully"); Mongocollection<document> collection = MongodatAbase.getcollection ("test");
         
         SYSTEM.OUT.PRINTLN ("Set Test selection succeeded"); Update the document modifies the LIKES=100 document in the document to likes=200 Collection.updatemany (Filters.eq ("likes"), New Document ("$set", new  
         Document ("likes", 200));  
         Retrieve view results finditerable<document> finditerable = Collection.find ();  
         mongocursor<document> mongocursor = Finditerable.iterator ();  
         while (Mongocursor.hasnext ()) {System.out.println (Mongocursor.next ());
      }}catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ());
Delete the document import org.bson.Document;
Import com.mongodb.MongoClient;
Import com.mongodb.client.FindIterable;
Import com.mongodb.client.MongoCollection;
Import Com.mongodb.client.MongoCursor;
Import Com.mongodb.client.MongoDatabase;


Import Com.mongodb.client.model.Filters;
      public class mongodbjdbc{public static void Main (String args[]) {try{//connection to MongoDB service mongoclient mongoclient = new Mongoclient ("localhost", 27017);  
         Connect to database Mongodatabase Mongodatabase = mongoclient.getdatabase ("MyCol");


         System.out.println ("Connect to Database successfully");
         Mongocollection<document> collection = mongodatabase.getcollection ("test");


         SYSTEM.OUT.PRINTLN ("Set Test selection succeeded");  
         Deletes the first document that meets the criteria Collection.deleteone (Filters.eq ("likes", 200));  
         Delete all eligible documents Collection.deletemany (FILTERS.EQ ("likes", 200));  
         Retrieve view results finditerable<document> finditerable = Collection.find ();  
         mongocursor<document> mongocursor = Finditerable.iterator ();  
         while (Mongocursor.hasnext ()) {System.out.println (Mongocursor.next ());
     }}catch (Exception e) {System.err.println (E.getclass (). GetName () + ":" + e.getmessage ()); }
   }
}