Java中使用

Maven 引入

<dependencies>
    <dependency>
        <groupId>org.mongodb</groupId>
        <artifactId>mongodb-driver</artifactId>
        <version>3.6.4</version>
    </dependency>
</dependencies>

1 连接数据库

public class MongoDBJDBC {  
    public static void main(String[] args){  
        try {  
            //连接到MongoDB服务 如果是远程连接可以替换“localhost”为服务器所在IP地址  
            //ServerAddress()两个参数分别为 服务器地址 和 端口  
            ServerAddress serverAddress = new ServerAddress("localhost",27017);  
            List<ServerAddress> addrs = new ArrayList<ServerAddress>();  
            addrs.add(serverAddress);  
              
            //MongoCredential.createScramSha1Credential()三个参数分别为 用户名 数据库名称 密码  
            MongoCredential credential = MongoCredential.createScramSha1Credential("username", "databaseName", "password".toCharArray());  
            List<MongoCredential> credentials = new ArrayList<MongoCredential>();  
            credentials.add(credential);  
              
            //通过连接认证获取MongoDB连接  
            MongoClient mongoClient = new MongoClient(addrs,credentials);  
              
            //连接到数据库  
            MongoDatabase mongoDatabase = mongoClient.getDatabase("databaseName");  
        } catch (Exception e) {  
            System.err.println( e.getClass().getName() + ": " + e.getMessage() );  
        }  
    }  
} 

2 创建集合

mongoDatabase.createCollection("test");

3 获取集合

MongoCollection<Document> collection = mongoDatabase.getCollection("test");

4 插入文档

/** 插入文档
* 1. 创建文档 org.bson.Document 参数为key-value的格式 
* 2. 创建文档集合List<Document> 
* 3. 将文档集合插入数据库集合中 mongoCollection.insertMany(List<Document>) 插入单个文档可以用 mongoCollection.insertOne(Document) 
* */
Document document = new Document("title", "MongoDB").  
append("description", "database").  
append("likes", 100).  
append("by", "Fly");  
List<Document> documents = new ArrayList<Document>();  
documents.add(document);  
collection.insertMany(documents);  

5 检索所有文档

//检索所有文档  
/** 
* 1. 获取迭代器FindIterable<Document> 
* 2. 获取游标MongoCursor<Document> 
* 3. 通过游标遍历检索出的文档集合 
* */  
FindIterable<Document> findIterable = collection.find();  
MongoCursor<Document> mongoCursor = findIterable.iterator();  
while(mongoCursor.hasNext()){  
System.out.println(mongoCursor.next());  
}  

6 更新文档

//更新文档   将文档中likes=100的文档修改为likes=200   
collection.updateMany(Filters.eq("likes", 100), new Document("$set",new Document("likes",200)));  

7 删除文档

//删除符合条件的第一个文档  
collection.deleteOne(Filters.eq("likes", 200));  
//删除所有符合条件的文档  
collection.deleteMany (Filters.eq("likes", 200));