如何使用 Java Mongo DB 驱动程序版本 3 将 BasicDBObject 转换为 Mongo 文档?

问题描述

在 Java Mongo DB 驱动程序版本 3 中，API 与版本 2 相比发生了变化.因此这样的代码不再编译:

BasicDBObject personObj = new BasicDBObject();collection.insert(personObj)

集合插入仅适用于 Mongo 文档.

处理旧代码我需要问的问题:

将 BasicDBObject 转换为文档的最佳方法是什么?

解决方案

We Can Convert BasicDBObject通过以下方式Document

public static Document getDocument(DBObject doc){if(doc == null) 返回 null；返回新文档(doc.toMap());}

as Document 本身是 Map 的实现.

和 BasicDBObject 也可以在 DBObject 中捕获，因为 BasicDBObject 是 DBObject 的实现.>

@Black_Rider 也适合您

In the Java Mongo DB driver version 3 the API has changed as compared to the version 2. So a code like this does not compile anymore:

BasicDBObject personObj = new BasicDBObject();
collection.insert(personObj) 

A Collection insert works only with a Mongo Document.

Dealing with the old code I need to ask the question:

What is the best way to convert a BasicDBObject to a Document?

解决方案

We Can Convert BasicDBObjectto Document by the following way

public static Document getDocument(DBObject doc)
{
   if(doc == null) return null;
   return new Document(doc.toMap());
}

as Document itself is an implementation of Map<String,Object>.

and BasicDBObject can be too be catch in DBObject as BasicDBObject is an implementation of DBObject.

@Black_Rider for you too

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