1、引入jar包 <!-- 載入MongoDB驅動包 --> <dependency>         <groupId>org.mongodb</groupId>     <artifactId>mongo-java-driver</artifactId>     <version>3.8.0</version> </dependency>

2、java中的基本呼叫 獲取mongodbDB地址(ServerAddress)->獲取mongoDB證書(MongoCredential，使用者名稱、資料庫名、密碼)->連線mongoDB服務(MongoClient)->連線資料庫(MongoDatabase)->操作資料庫     //連線到MongoDB服務 如果是遠端連線可以替換“localhost”為伺服器所在IP地址       //ServerAddress()兩個引數分別為 伺服器地址 和 埠  ServerAddress serverAddress = new ServerAddress("localhost",27017);   List<ServerAddress> addrs = new ArrayList<ServerAddress>();       addrs.add(serverAddress);                      //MongoCredential.createScramSha1Credential()三個引數分別為 使用者名稱 資料庫名稱 密碼   MongoCredential credential = MongoCredential.createScramSha1Credential("test", "test", "test".toCharArray());       List<MongoCredential> credentials = new ArrayList<MongoCredential>();       credentials.add(credential);                      //通過連線認證獲取MongoDB連線       MongoClient mongoClient = new MongoClient(addrs,credentials);                      //連線到資料庫       MongoDatabase mongoDatabase = mongoClient.getDatabase("test");       // mongoDatabase.createCollection("javaCollection");     //System.out.println("create collection successfully");     Document document = new Document();     document.append("javaTest", "javaTest");     mongoDatabase.getCollection("javaCollection").insertOne(document);                  FindIterable<Document>  findIterable = mongoDatabase.getCollection("javaCollection").find();     MongoCursor<Document> cursor = findIterable.iterator();     while (cursor.hasNext()) {     System.out.println(cursor.next()); }