MongoDb :如何在Java中为复合索引设置IndexOptions背景为真

<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>3.12.10</version>
</dependency>

import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
import com.mongodb.client.MongoDatabase;

// 创建MongoClient实例
MongoClientURI uri = new MongoClientURI("mongodb://localhost:27017");
MongoClient mongoClient = new MongoClient(uri);

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

import com.mongodb.client.model.IndexOptions;

// 创建IndexOptions实例
IndexOptions indexOptions = new IndexOptions();

// 设置索引的名称
indexOptions.name("your_index_name");

// 设置索引是否唯一
indexOptions.unique(true);

// 设置索引是否稀疏
indexOptions.sparse(true);

import com.mongodb.client.MongoCollection;
import org.bson.Document;

// 获取要创建索引的集合
MongoCollection<Document> collection = database.getCollection("your_collection_name");

// 创建复合索引
Document index = new Document();
index.append("field1", 1);
index.append("field2", -1);

// 创建索引并设置IndexOptions
collection.createIndex(index, indexOptions);