In your code, that person would probably be a Person class, with simple primitive fields, an array field, and an Address field.Please check out the new Java tutorials on the Developer Hub.
Mongodb Java Tutorial How To Work WithMongodb Java Tutorial Driver And HowFor new users, its important to provide an overview of how to work with the MongoDB Java driver and how to use MongoDB as a Java developer.Mongodb Java Tutorial Download The AppropriateIf you want to follow along with this getting started guide, youll want to download the appropriate version of MongoDB and unzipinstall it.
At the time of writing, the latest version of MongoDB is 2.6.3, which is the version Ill be using. This is something that MongoDB takes seriously and theres a whole section of documentation on security. Most of the MongoDB technical documentation is written for the shell, so its always useful to know how to access it, and how use it to troubleshoot problems or prototype solutions. The shell is a really great environment for trying out queries and looking at things from the point-of-view of the server. However, I promised you Java, so were going to step away from the shell and get on with connecting via Java. These days IDEs tend to pick up the correct dependencies through your Gradle or. Theres more detailed information on how to create the correct URI, including how to connect to a Replica Set, in the MongoClientURI documentation. Youll either have to catch this or declare it, depending upon what your policy is for exception handling. Your instance of MongoClient (e.g. Client above) will ordinarily be a singleton in your application. However, if you need to connect via different credentials (different user names and passwords) youll want a MongoClient per set of credentials. Using a single MongoClient (and optionally configuring its settings ) will allow the driver to correctly manage your connections to the server. This MongoClient singleton is safe to be used by multiple threads. Always make sure your application or web server calls MongoClient.close() when it shuts down. There are some new concepts to learn when youre using it, but nothing too challenging. If you remember, a few sections ago we used the MongoDB shell to show the databases in your MongoDB instance, and you had an admin and a local. If the database doesnt already exist, it will be created automatically the first time you insert anything into it, so theres no need for null checks or exception handling on the off-chance the database doesnt exist. ![]() You can evolve the document over time without incurring the cost of schema migrations and tedious update scripts. Unlike a relational database, where you might store this in a separate table and provide a reference to it, in MongoDB if that data benefits from always being associated with its parent, you can embed it in its parent. ![]()
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