java操作mongodb數據庫

一、在pom.xml中添加mongo驅動

<dependency>
	<groupId>org.mongodb</groupId>
	<artifactId>mongo-java-driver</artifactId>
	<version>3.2.2</version>
</dependency>

二、CURD

package com.bjx.service;

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

import org.bson.Document;

import com.mongodb.BasicDBObject;
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 MongoCon {
	
	//	不同的版本api有所不同，具體參考：https://api.mongodb.com/java/ 該版本 3.2.22
	private static MongoDatabase mongoDatabase;
	static {
		try{
            //ServerAddress()兩個參數分別爲 服務器地址 和 端口
            ServerAddress serverAddress = new ServerAddress("127.0.0.1",27017);
            System.out.println(serverAddress);
            //MongoCredential.createScramSha1Credential()三個參數分別爲 用戶名 數據庫名稱 密碼
            MongoCredential credential = MongoCredential.createScramSha1Credential("test", "test", "test".toCharArray());
            //通過連接認證獲取MongoDB連接
            MongoClient mongoClient = new MongoClient(Arrays.asList(serverAddress), Arrays.asList(credential));
            //連接到數據庫
            mongoDatabase = mongoClient.getDatabase("test");
            System.out.println("<______________Mongodb數據庫連接成功！_____________>");
        }catch(Exception e){
            System.err.println("！！MongoDB數據庫連接異常：" + e.getMessage() );
        }
	}
	
		//創建集合
	    public static void create(){
	        try{
	        	mongoDatabase.createCollection("usertest");
	            System.out.println("集合創建成功");
	        }catch(Exception e){
	            System.err.println( "！！集合創建異常：" + e.getMessage() );
	        }
	    }
	  //查看數據
	    public static void find(){
	        try {
	            MongoCollection<Document> list = mongoDatabase.getCollection("usertest");
	            BasicDBObject o = new BasicDBObject();
	            o.put("address","深圳市福田區");
	            FindIterable<Document> findIterable = list.find(o);
	            MongoCursor<Document> mongoCursor = findIterable.iterator();
	            while (mongoCursor.hasNext()) {
	                System.out.println("查詢的數據:" + mongoCursor.next());
	            }
	        }catch(Exception e){
	            System.err.println( "！！數據查詢異常：" + e.getMessage() );
	        }
	 
	    }
	  //新增數據
	    public static void add() {
	        try {
	        	System.out.println(mongoDatabase);
	            //新增兩個學生和教師的數據
	            MongoCollection<Document> collections = mongoDatabase.getCollection("usertest");
	            Document document1 = new Document("username", "老師");
	            List<Document> documents = new ArrayList<Document>();
	            documents.add(document1);
	            collections.insertMany(documents);
	            System.out.println("數據插入成功");
	        }catch(Exception e){
	        System.err.println( "！！數據新增異常：" + e.getMessage() );
	    }
	    }
	 
	  //修改數據
	    public static void  update(){
	        try {
	            MongoCollection<Document> mongoCollection = mongoDatabase.getCollection("usertest");
	            //修改滿足條件的第一條數據
	            mongoCollection.updateOne(Filters.eq("username", "老師"), new Document("$set", new Document("address", "深圳市福田區")));
	            //修改所以滿足條件的數據
	            //mongoCollection.updateMany(Filters.eq("name", "老師"), new Document("$set", new Document("likeTv", "CCTV-1")));
	            FindIterable<Document> findIterable = mongoCollection.find();
	            MongoCursor<Document> mongoCursor = findIterable.iterator();
	            while (mongoCursor.hasNext()) {
	                System.out.println("更新後的數據:" + mongoCursor.next());
	            }
	        }catch(Exception e){
	            System.err.println( "！！數據更新異常：" + e.getMessage() );
	        }
	    }
	  //刪除數據
	    public static void delete(){
	        try {
	            MongoCollection<Document> collection = mongoDatabase.getCollection("usertest");
	            //刪除符合條件的第一個文檔
	            collection.deleteOne(Filters.eq("name", "學生"));
	            //刪除所有符合條件的文檔
	            //collection.deleteMany(Filters.eq("name", "學生"));
	            //檢索查看結果
	            FindIterable<Document> findIterable = collection.find();
	            MongoCursor<Document> mongoCursor = findIterable.iterator();
	            while (mongoCursor.hasNext()) {
	                System.out.println("刪除後的數據：" + mongoCursor.next());
	            }
	        }catch(Exception e){
	            System.err.println( "！！數據刪除異常：" + e.getMessage() );
	        }
	    }
}