クイックリファレンス

このページでは、いくつかの MongoDB コマンドのドライバー構文を示し、それらに関連するリファレンスと API ドキュメントにリンクします。

コマンド

構文

Find a Document

API Documentation
Usage Example
Fundamentals

coll.find(Filters.eq("title", "Hamlet")).first();

{ title: 'Hamlet', type: 'movie', ... }

Find Multiple Documents

API Documentation
Usage Example
Fundamentals

coll.find(Filters.eq("year", 2005))

[
  { title: 'Christmas in Boston', year: 2005, ... },
  { title: 'Chicken Little', year: 2005, ... },
  ...
]

Insert a Document

API Documentation
Usage Example
Fundamentals

coll.insertOne(new Document("title", "Jackie Robinson"));

Insert Multiple Documents

API Documentation
Usage Example
Fundamentals

coll.insertMany(
    Arrays.asList(
            new Document("title", "Dangal").append("rating", "Not Rated"),
            new Document("title", "The Boss Baby").append("rating", "PG")));

Update a Document

API Documentation
Usage Example
Fundamentals

coll.updateOne(
        Filters.eq("title", "Amadeus"),
        Updates.set("imdb.rating", 9.5));

{ title: 'Amadeus', imdb: { rating: 9.5, ... } }

Update Multiple Documents

API Documentation
Usage Example
Fundamentals

coll.updateMany(
        Filters.eq("year", 2001),
        Updates.inc("imdb.votes", 100));

[
  { title: 'A Beautiful Mind', year: 2001, imdb: { votes: 826257, ... },
  { title: 'Shaolin Soccer', year: 2001, imdb: { votes: 65442, ... },
  ...
]

Update an Array in a Document

API Documentation
Fundamentals

coll.updateOne(
        Filters.eq("title", "Cosmos"),
        Updates.push("genres", "Educational"));

{ title: 'Cosmos', genres: [ 'Documentary', 'Educational' ], ...}

Replace a Document

API Documentation
Usage Example
Fundamentals

coll.replaceOne(
        Filters.and(Filters.eq("name", "Deli Llama"), Filters.eq("address", "2 Nassau St")),
        new Document("name", "Lord of the Wings").append("zipcode", 10001));

{ name: 'Lord of the Wings', zipcode: 10001 }

Delete a Document

API Documentation
Usage Example
Fundamentals

coll.deleteOne(Filters.eq("title", "Congo"));

Delete Multiple Documents

API Documentation
Usage Example
Fundamentals

coll.deleteMany(Filters.regex("title", "^Shark.*"));

Bulk Write

API Documentation
Usage Example
Fundamentals

coll.bulkWrite(
        Arrays.asList(
               new InsertOneModel<Document>(
                       new Document().append("title", "A New Movie").append("year", 2022)),
               new DeleteManyModel<Document>(
                       Filters.lt("year", 1970))));

Watch for Changes

API Documentation
Usage Example
Fundamentals

coll.watch(Arrays.asList(
        Aggregates.match(Filters.gte("year", 2022))));

Access Data from a Cursor Iteratively

API Documentation
Fundamentals

MongoCursor<Document> cursor = coll.find().cursor();
while (cursor.hasNext()) {
    System.out.println(cursor.next().toJson());
}

[
  { title: '2001: A Space Odyssey', ... },
  { title: 'The Sound of Music', ... },
  ...
]

Access Results from a Query as an Array

API Documentation

List<Document> resultList = new ArrayList<Document>();
coll.find().into(resultList);

[
  { title: '2001: A Space Odyssey', ... },
  { title: 'The Sound of Music', ... },
  ...
]

Count Documents

API Documentation
Usage Example

coll.countDocuments(Filters.eq("year", 2000));

List the Distinct Documents or Field Values
API Documentation
Usage Example

coll.distinct("year", Integer.class);

[ 1891, 1893, 1894, 1896, 1903, ... ]

Limit the Number of Documents Retrieved

API Documentation
Fundamentals

coll.find().limit(2);

[
  { title: 'My Neighbor Totoro', ... },
  { title: 'Amélie', ... }
]

Skip Retrieved Documents

API Documentation
Fundamentals

coll.find(Filters.regex("title", "^Rocky")).skip(2);

[
  { title: 'Rocky III', ... },
  { title: 'Rocky IV', ... },
  { title: 'Rocky V', ... }
]

Sort the Documents When Retrieving Them

API Documentation
Fundamentals

coll.find().sort(Sorts.ascending("year"));

[
  { title: 'Newark Athlete', year: 1891, ... },
  { title: 'Blacksmith Scene', year: 1893, ...},
  { title: 'Dickson Experimental Sound Film', year: 1894},
  ...
]

Project Document Fields When Retrieving Them

API Documentation
Usage Example
Fundamentals

coll.find().projection(Projections.fields(
       Projections.excludeId(),
       Projections.include("year", "imdb")));

[
  { year: 2012, imdb: { rating: 5.8, votes: 230, id: 8256 }},
  { year: 1985, imdb: { rating: 7.0, votes: 447, id: 1654 }},
  ...
]

Create an Index

API Documentation
Fundamentals

coll.createIndex(
        Indexes.compoundIndex(
                Indexes.ascending("title"),
                Indexes.descending("year")));

Search Text

API Documentation
Fundamentals

// only searches fields with text indexes
coll.find(Filters.text("zissou"));

[
  { title: 'The Life Aquatic with Steve Zissou', ... }
]

Install the Driver Dependency with Maven

pom.xml

<dependencies>
  <dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongodb-driver-sync</artifactId>
    <version>5.2.1</version>
  </dependency>
</dependencies>

Install the Driver Dependency with Gradle

build.grouple

dependencies {
  implementation 'org.mongodb:mongodb-driver-sync:5.2.1'
}

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