Mongo java api忽略嵌套的或/和运算符。

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

import java.util.ArrayList;
import java.util.List;

public class MongoJavaAPIExample {
    public static void main(String[] args) {
        // 连接MongoDB数据库
        String connectionString = "mongodb://localhost:27017";
        try (var mongoClient = MongoClients.create(connectionString)) {
            // 选择数据库和集合
            MongoDatabase database = mongoClient.getDatabase("mydb");
            MongoCollection<Document> collection = database.getCollection("mycollection");

            // 构建查询条件
            List<Document> conditions = new ArrayList<>();
            conditions.add(new Document("field1", "value1"));
            conditions.add(new Document("field2", "value2"));

            // 构建查询
            Document query = new Document("$or", conditions);

            // 执行查询
            MongoCursor<Document> cursor = collection.find(query).iterator();
            while (cursor.hasNext()) {
                Document document = cursor.next();
                // 处理查询结果
                System.out.println(document.toJson());
            }
        }
    }
}