java连接MongDB

约定不等于承诺〃 2022-06-05 06:44 161阅读 0赞

环境简介：  
java版本：1.8  
mongoDB版本：3.4.5  
Linux机器ip：192.168.61.186

下载支持jar：地址是：

[https://oss.sonatype.org/content/repositories/releases/org/mongodb/mongo-java-driver/3.4.3/][https_oss.sonatype.org_content_repositories_releases_org_mongodb_mongo-java-driver_3.4.3]

最好把源码也下载下来  
![这里写图片描述][SouthEast]

创建java工程

![这里写图片描述][SouthEast 1]

查看源码：  
![这里写图片描述][SouthEast 2]

知道mongoDB服务器的ip和端口即可连接：

package com.adtec.mongodb;
    
    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;
    
    /** * * @author 浪丶荡 * */
    public class MongoDBUtils { 
    
        public static void main(String[] args) {
            //连接到 mongodb 服务
            String host = "192.168.61.186";
            int port = 27017;
            @SuppressWarnings("resource")
            MongoClient mongoClient = new MongoClient(host,port);
             // 连接到数据库
            String databaseName = "test";
            MongoDatabase database = mongoClient.getDatabase(databaseName);
            //选择集合（类似选择表）
            String collectionName = "country";
            MongoCollection<Document> collection = database.getCollection(collectionName);
            //获取迭代器FindIterable<Document> 
            FindIterable<Document> findIterable  = collection.find();
            //获取游标MongoCursor<Document> 
            MongoCursor<Document> mongoCursor = findIterable.iterator();  
            //通过游标遍历检索出的文档集合 
            while(mongoCursor.hasNext()){  
               System.out.println(mongoCursor.next());  
            }  
        }
    }

![这里写图片描述][SouthEast 3]

[https_oss.sonatype.org_content_repositories_releases_org_mongodb_mongo-java-driver_3.4.3]: https://oss.sonatype.org/content/repositories/releases/org/mongodb/mongo-java-driver/3.4.3/
[SouthEast]: /images/20220605/f2e32c64b5d34bd49a6a9068cb9b26ef.png
[SouthEast 1]: /images/20220605/6e5ac8f16efd490ab37ca05811cfa44e.png
[SouthEast 2]: /images/20220605/bbbfc0972ecc4c3dbb27e3649057391c.png
[SouthEast 3]: /images/20220605/78665af1d5354cafa5d9c9f461247264.png