如何使用MongoTemplate将Mongo Shell脚本转换为Java？

import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

public class MongoExample {
    private MongoTemplate mongoTemplate;

    public MongoExample(MongoTemplate mongoTemplate) {
        this.mongoTemplate = mongoTemplate;
    }

    public void findDocuments() {
        Query query = new Query(Criteria.where("name").is("John"));
        List<Document> documents = mongoTemplate.find(query, Document.class);
        for (Document document : documents) {
            System.out.println(document);
        }
    }

    public void updateDocument() {
        Query query = new Query(Criteria.where("name").is("John"));
        Update update = new Update().set("age", 30);
        mongoTemplate.updateFirst(query, update, Document.class);
    }

    // 其他操作类似，根据需求使用MongoTemplate提供的方法进行转换和执行
}