java 连接 MOngoDB 操作

以你之姓@ 2023-02-19 13:26 23阅读 0赞

package mongo;
    import java.nio.file.DirectoryStream.Filter;
    import java.util.ArrayList;
    import java.util.List;
    import org.bson.Document;
    import com.mongodb.MongoClient;
    import com.mongodb.client.FindIterable;
    import com.mongodb.client.MongoCollection;
    import com.mongodb.client.MongoDatabase;
    import com.mongodb.client.model.Filters;
    import com.mongodb.client.MongoCursor;
    public class Mongo1 {
        
    	public static void main(String args []){
         
    	      try {
            
    	       //连接到mongodb服务
    	         MongoClient mongoClient = new MongoClient ("localhost",27017); 
    
    	    	  //有密码的连接
    	    	  /*
    	        ServerAddress  serverAddress = new  ServerAddress("localhost",27017);
    	        ArrayList<ServerAddress> addrs = new ArrayList<ServerAddress>(); 
    	        addrs.add(serverAddress);
    	        
    	        MongoCredential credential = MongoCredential.createScramSha1Credential("username", "databaseName", "password".toCharArray()); 
    	        ArrayList<MongoCredential> credentials1 = new ArrayList<MongoCredential>();
    	        credentials1.add(credential);
    	        
    //	        //连接认证获取MOngoDB连接
    	        MongoClient mongoClient = new MongoClient(addrs,credentials1);	*/
    	    	
    	    	  
    	    	  //连接到数据库test	       
    	        MongoDatabase mongoDatabase = mongoClient.getDatabase("test");
    	        System.out.println("成功连接到数据库"); 
    	        System.out.println("数据库："+mongoDatabase.getName()); 
    	        
    	        //指定集合，插入文档  
    	         /** 
    	         * 1. 创建文档 org.bson.Document 参数为key-value的格式 
    	         * 2. 创建文档集合List<Document> 
    	         * 3. 将文档集合插入数据库集合中 mongoCollection.insertMany(List<Document>) 插入单个文档可以用 mongoCollection.insertOne(Document) 
    	         
    	        MongoCollection<org.bson.Document> mongoCol= mongoDatabase.getCollection("myinsert");
    	        System.out.println("集合myinsert选择成功");
    	        Document document1 = new Document("name","刘备")
    	        .append("_id", 5)
    	        .append("house","重庆")
    	    	.append("Ares","78km2");
    	        Document document2 = new Document("name","关羽")
    	    	        .append("_id", 6)
    	    	        .append("house","汉")
    	    	    	.append("Ares","960km2");
    	        Document document3 = new Document("name","曹操")
    	    	        .append("_id", 7)
    	    	        .append("house","魏国")
    	    	    	.append("Ares","300km2");
    	        List<Document> documents = new ArrayList<Document>();  
    	        documents.add(document1);  
    	        documents.add(document2); 
    	        documents.add(document3); 
    	        mongoCol.insertMany(documents);
    	        System.out.println("成功插入");
    	        * */
    	        MongoCollection<org.bson.Document> mongoCol= mongoDatabase.getCollection("myinsert");  
    	        System.out.println("集合myinsert选择成功");
    	        
    	        mongoCol.updateMany(Filters.eq("name","曾啊牛"), new Document("$set",new Document("name","周瑜")));
    	        System.out.println("数据更新成功");
    	        
    	        //删除符合条件的第一个文档  
    //	         mongoCol.deleteOne(Filters.eq("likes", 200));  
    	         //删除所有符合条件的文档  
    	         mongoCol.deleteMany (Filters.eq("Ares","100km2"));
    	         System.out.println("删除成功");
    	        
    	        //检索所有文档  
    	         /** 
    	         * 1. 获取迭代器FindIterable<Document> 
    	         * 2. 获取游标MongoCursor<Document> 
    	         * 3. 通过游标遍历检索出的文档集合 
    	         * */  
    	         FindIterable<Document> findIterable = mongoCol.find();  
    	         MongoCursor<Document> mongoCursor = findIterable.iterator();
    	         System.out.println("文档搜索:");
    	         while(mongoCursor.hasNext()){
          
    	            System.out.println(mongoCursor.next());  }
    	        
    	      } catch(Exception e){
         
    	        System.err.println(e.getClass().getName()+":" + e.getMessage()); 
    	     } 
    	   } 
    	}

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