Creating BSON object from JSON string

Question

I have Java app that takes data from external app. Incoming JSONs are in Strings. I would like to parse that Strings and create BSON objects.

Unfortunate I can't find API for that in Java's BSON implementation.

Do I have use external parser for that like GSON?

Answer 1

... And, since 3.0.0, you can:

import org.bson.Document;  final Document doc = new Document("myKey", "myValue"); final String jsonString = doc.toJson(); final Document doc = Document.parse(jsonString); 

Official docs:

• Document.parse(String)
• Document.toJson()

Answer 2

Official MongoDB Java Driver comes with utility methods for parsing JSON to BSON and serializing BSON to JSON.

import com.mongodb.DBObject; import com.mongodb.util.JSON;  DBObject dbObj = ... ; String json = JSON.serialize( dbObj ); DBObject bson = ( DBObject ) JSON.parse( json ); 

The driver can be found here: https://mongodb.github.io/mongo-java-driver/

Answer 3

Use Document.parse(String json) from org.bson.Document. It returns Document object which is type of Bson.

Answer 4

The easiest way seems to be to use a JSON library to parse the JSON strings into a Map and then use the putAll method to put those values into a BSONObject.

This answer shows how to use Jackson to parse a JSON string into a Map.