将mongoshell投影转换为Spring MongoTemplate投影

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.ProjectionOperation;

// 创建MongoTemplate对象
MongoTemplate mongoTemplate = new MongoTemplate();

// 创建Query对象，用于构建查询条件
Query query = new Query();

// 创建ProjectionOperation对象，用于定义投影操作
ProjectionOperation projectionOperation = Aggregation.project("field1", "field2").andExclude("field3", "field4");

// 将ProjectionOperation应用到Query对象上
query.addCriteria(Criteria.where("condition").is("value")).with(projectionOperation);

// 执行查询
List<Entity> result = mongoTemplate.find(query, Entity.class);