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MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù)

2年前作者：Augenstern K分類：Toy博客閱讀(20)違法舉報(bào)

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在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù)

1. 啟動MongoDB Shell

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

2. 切換到admin數(shù)據(jù)庫，使用root賬戶

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

3.開啟Eclipse，創(chuàng)建Java Project項(xiàng)目，命名為MongoJava

File --> New --> Java Project

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

4.在MongoJava項(xiàng)目下新建包，包名為mongo

MongoJava右鍵 --> New --> mongo

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

5. 在mongo包下新建類，類名為mimalianjie

mongo右鍵 --> New --> Class

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

6. 添加項(xiàng)目依賴的jar包，右鍵單擊MongoJava，選擇Import

7. 選擇General中的File System，點(diǎn)擊Next

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

8. 選擇存放mongo連接java的驅(qū)動程序的文件夾，并進(jìn)行勾選Create top-level folder

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

9. 選中導(dǎo)入的文件夾中的mongo-java-driver-3.2.2.jar，右擊選擇Build Path中的Add to Build Path。

10. 連接數(shù)據(jù)庫：編寫代碼，功能為連接Mongodb數(shù)據(jù)庫。我們需要指定數(shù)據(jù)庫名稱，如果指定的數(shù)據(jù)庫不存在，mongo會自動創(chuàng)建數(shù)據(jù)庫

package mongo;

import java.util.ArrayList;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoDatabase;

public class mimalianjie {
	public static void main(String[] args) {
		try {
			ServerAddress serverAddress = new ServerAddress("localhost",27017);
			ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
			addrs.add(serverAddress);
			
MongoCredential credential = MongoCredential.createScramSha1Credential("root", "admin", "strongs".toCharArray());
			ArrayList<MongoCredential> credentials = new
					ArrayList<MongoCredential>();
			credentials.add(credential);

			MongoClient mongoClient = new MongoClient(addrs,credentials);
			
			MongoDatabase mongoDatabase = mongoClient.getDatabase("databaseName");
			System.out.println("Connect to database successfully");
		} catch (Exception e) {
			System.err.println( e.getClass().getName() + ": " + e.getMessage() );
		}
	}

}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

11. 創(chuàng)建集合：與上述步驟相同，在mongo包下新建類，類名為chuangjianjihe，編寫代碼，功能為在test庫下創(chuàng)建集合mycol（使用com.mongodb.client.MongoDatabase類中的createCollection()來創(chuàng)建集合）

package mongo;

import java.util.ArrayList;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoDatabase;

public class chuanjianjihe {
	public static void main(String[] args) {
		try {
			ServerAddress serverAddress = new ServerAddress("localhost",27017);
			ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
			addrs.add(serverAddress);
			
MongoCredential credential = MongoCredential.createScramSha1Credential("root","admin","strongs".toCharArray());
			ArrayList<MongoCredential> credentials = new ArrayList<MongoCredential>();
			credentials.add(credential);
			MongoClient mongoClient = new MongoClient(addrs,credentials);
			
			MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
			System.out.println("Connect to database successfully");
			
				mongoDatabase.createCollection("mycol");
				System.out.println("集合mycol創(chuàng)建成功");
		}catch (Exception e) {
			System.err.println( e.getClass().getName() + ": " + e.getMessage());
		}
	}

}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

12. 在mongodb中進(jìn)行驗(yàn)證

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

13. 獲取集合：在mongo包下新建類，名為huoqujihe，并編寫代碼，功能為獲取所需集合（使用com.mongodb.client.MongoDatabase類的 getCollection() 方法來獲取一個(gè)集合）

package mongo;

import java.util.ArrayList;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;

public class huoqujihe {
	public static void main(String[] args) {
		try {
			ServerAddress serverAddress = new ServerAddress("localhost",27017);
			ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
			addrs.add(serverAddress);
			
			MongoCredential credential = MongoCredential.createScramSha1Credential("root","admin","strongs".toCharArray());
			ArrayList<MongoCredential> credentials = new ArrayList<MongoCredential>();
			credentials.add(credential);
			
			MongoClient mongoClient = new MongoClient(addrs,credentials);
			
			MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
			System.out.println("Connect to database successfully");
			MongoCollection<org.bson.Document> collection = mongoDatabase.getCollection("mycol");
			System.out.println("集合mycol選擇成功");
		} catch (Exception e) {
			System.err.println( e.getClass().getName() + ": " + e.getMessage());
		}
	}

}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

14.插入文檔：在mongo包中新建類，名為charuwendang，功能為連接test庫，選擇mycol集合并向其中插入文檔。（使用com.mongodb.client.MongoCollection類的insertMany()方法來插入一個(gè)文檔）

package mongo;

import java.util.ArrayList;
import java.util.List;

import org.bson.Document;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;

public class charuwendang {
	public static void main (String[] args) {
		try {
			ServerAddress serverAddress = new ServerAddress("localhost",27017);
			ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
			addrs.add(serverAddress);
			
			MongoCredential credential = MongoCredential.createScramSha1Credential("root"
			,"admin","strongs".toCharArray());
			ArrayList<MongoCredential> credentials = new ArrayList<MongoCredential>();
			credentials.add(credential);
			
			MongoClient mongoClient = new MongoClient(addrs,credentials);
			
			MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
			System.out.println("Connect to database successfully");
			MongoCollection<org.bson.Document> collection = mongoDatabase.getCollection("mycol");
			System.out.println("集合mycol選擇成功");
			
			Document document = new Document("name", "zhangyudashuju").
			append("description", "YXCX").
			append("likes", 100).
			append("location", "BJ");
			List<Document> documents = new ArrayList<Document>();
			documents.add(document);
			collection.insertMany(documents);
			System.out.println("文檔插入成功");
		}catch(Exception e) {
			System.err.println( e.getClass().getName() + ": " + e.getMessage() );
		}
	}
}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

15.在mongodb中進(jìn)行查詢驗(yàn)證

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

16. 檢索文檔：在mongo包中新建類，名為jiansuosuoyouwendang，功能為檢索test庫下，mycol集合中的所有文檔（使用 com.mongodb.client.MongoCollection 類中的 find() 方法來獲取集合中的所有文檔）

package mongo;

import java.util.ArrayList;

import org.bson.Document;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.FindIterable;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;

public class jiansuosuoyouwendang {
	public static void main( String args[] ){
		try{
		ServerAddress serverAddress = new ServerAddress("localhost",27017);
		ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
		addrs.add(serverAddress);
 
		MongoCredential credential = MongoCredential.createScramSha1Credential("root"
		,"admin", "strongs".toCharArray());
		ArrayList<MongoCredential> credentials = new ArrayList<MongoCredential>();
		credentials.add(credential);
		 
		MongoClient mongoClient = new MongoClient(addrs,credentials);
		 
		MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
		System.out.println("Connect to database successfully");
		MongoCollection<org.bson.Document> collection = mongoDatabase.getCollection("mycol");
		System.out.println("集合mycol選擇成功");
		 
		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() );
		}
	}
}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

17. 更新文檔：在mongo包中新建類，名為gengxinwendang，功能為選擇test庫下mycol集合，將文檔中的likes=100改為likes=200（使用 com.mongodb.client.MongoCollection 類中的updateMany()方法來更新集合中的文檔）

package mongo;

import java.util.ArrayList;

import org.bson.Document;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
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 gengxinwendang {

	public static void main( String args[] ){
		try{
		ServerAddress serverAddress = new ServerAddress("localhost",27017);
			ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
			addrs.add(serverAddress);
		
			MongoCredential credential = MongoCredential.createScramSha1Credential("root"
					,"admin", "strongs".toCharArray());
			ArrayList<MongoCredential> credentials = new ArrayList<MongoCredential>();
			credentials.add(credential);
		
			MongoClient mongoClient = new MongoClient(addrs,credentials);
			
			MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
		 	System.out.println("Connect to database successfully");
		 	MongoCollection<org.bson.Document> collection = mongoDatabase.getCollection("mycol");
		 	System.out.println("集合mycol選擇成功");
		
		collection.updateMany(Filters.eq("likes", 100), new Document("$set",new Document("likes",200)));
		
		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() );
		}
	}
}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

18. 在mongodb中進(jìn)行查詢驗(yàn)證

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

19. 刪除文檔：在mongo包中新建類，名為sanchuwendang，功能為選擇test庫下mycol集合，刪除所有符合條件（likes=200）的文檔。（使用com.mongodb.DBCollection類中的findOne()方法來獲取第一個(gè)文檔，然后使用remove方法刪除）

package mongo;

import java.util.ArrayList;

import org.bson.Document;

import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
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 shanchuwendang {
	public static void main( String args[] ){
		try{
		ServerAddress serverAddress = new ServerAddress("localhost",27017);
			ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>();
			addrs.add(serverAddress);
		
		
			MongoCredential credential = MongoCredential.createScramSha1Credential("root"
					,"admin", "strongs".toCharArray());
			ArrayList<MongoCredential> credentials = new ArrayList<MongoCredential>();
			credentials.add(credential);
		
		
			MongoClient mongoClient = new MongoClient(addrs,credentials);
		
		
			MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
			System.out.println("Connect to database successfully");
			MongoCollection<org.bson.Document> collection = mongoDatabase.getCollection("mycol");
			System.out.println("集合mycol選擇成功");
		
		//刪除符合條件的第一個(gè)文檔
		//collection.deleteOne(Filters.eq("likes", 200));
		//刪除所有符合條件的文檔
		collection.deleteMany (Filters.eq("likes", 200));
		//檢索查看結(jié)果
		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() );
		}
	}
}

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

20. 在mongodb中進(jìn)行查詢驗(yàn)證

MongoDB實(shí)驗(yàn)——在Java應(yīng)用程序中操作 MongoDB 數(shù)據(jù),MongoDB,mongodb,數(shù)據(jù)庫

查詢結(jié)果為空，證明文檔已被刪除。

至此，實(shí)驗(yàn)結(jié)束!文章來源地址http://www.zghlxwxcb.cn/news/detail-685866.html

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