mongodb(mongotemplate)不使用objectI

1 指定主键类型: @MongoId(targetType = FieldType.STRING)

package com.gzz;

import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapping.FieldType;
import org.springframework.data.mongodb.core.mapping.MongoId;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
@Document("user")
public class User {
    @MongoId(targetType = FieldType.STRING)
    private String id;
    private String name;
    private Integer age;

}

2 提前给定主键: org.bson.types.ObjectId && ObjectId.get().toString()

package com.gzz;

import java.util.List;

import javax.annotation.PostConstruct;

import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.mongodb.core.MongoTemplate;
import static org.springframework.data.mongodb.core.query.Criteria.where;
import static org.springframework.data.mongodb.core.query.Query.query;
import lombok.extern.slf4j.Slf4j;

@Slf4j
@SpringBootApplication
public class Application3 {
    public static void main(String[] args) {
        SpringApplication.run(Application3.class, args);
    }

    @Autowired
    private MongoTemplate mongoTemplate;

    @PostConstruct
    public void init() {
        User user1 = User.builder().id(ObjectId.get().toString()).name("张三").age(12).build();
        User user2 = User.builder().id(ObjectId.get().toString()).name("李四").age(14).build();
        User user3 = User.builder().id(ObjectId.get().toString()).name("王五").age(15).build();
        mongoTemplate.insert(List.of(user1, user2, user3), User.class);
        User user = mongoTemplate.findOne(query(where("_id").is("61e139e4531fde11308e9fca")), User.class);
        log.info("user={}",user);
    }

}