SpringBoot MongoTemplate使用详解

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;
import org.springframework.stereotype.Service;
 
@Service
public class MyMongoService {
 
    @Autowired
    private MongoTemplate mongoTemplate;
 
    public void insert(MyDocument document) {
        mongoTemplate.insert(document, "myCollection");
    }
 
    public MyDocument findById(String id) {
        return mongoTemplate.findById(id, MyDocument.class, "myCollection");
    }
 
    public void update(String id, MyDocument newDocument) {
        Query query = new Query(Criteria.where("id").is(id));
        Update update = new Update().set("field1", newDocument.getField1()).set("field2", newDocument.getField2());
        mongoTemplate.updateFirst(query, update, MyDocument.class, "myCollection");
    }
 
    public void deleteById(String id) {
        Query query = new Query(Criteria.where("id").is(id));
        mongoTemplate.remove(query, MyDocument.class, "myCollection");
    }
}
 
class MyDocument {
    private String id;
    private String field1;
    private String field2;
 
    // getters and setters
}

这个代码示例展示了如何使用Spring Boot的MongoTemplate来执行MongoDB的基本操作，包括插入、查询、更新和删除。这个类可以被注入到Spring的应用上下文中，并用于与MongoDB数据库交互。