用java查询mongo oplog的时间戳字段

import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;

public class QueryOplogTimestamp {
    public static void main(String[] args) {
        // 连接MongoDB服务器
        MongoClient mongoClient = new MongoClient("localhost", 27017);

        // 连接数据库
        MongoDatabase database = mongoClient.getDatabase("your_database_name");

        // 获取oplog集合
        MongoCollection<Document> oplogCollection = database.getCollection("oplog.rs");

        // 查询oplog的时间戳字段
        MongoCursor<Document> cursor = oplogCollection.find().iterator();
        try {
            while (cursor.hasNext()) {
                Document document = cursor.next();
                // 获取时间戳字段
                Object timestamp = document.get("ts");
                System.out.println(timestamp);
            }
        } finally {
            cursor.close();
        }

        // 关闭MongoDB连接
        mongoClient.close();
    }
}