springboot 是我们java开发界的老牌开发框架，csdn上有一些基础的增删改查的教程详细但是不是很全，我自己再整合boot+mongodb的时候发现有些方法已经过时，或者是即将废弃的方法。
特总结如下

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

以上是我们boot+mongo需要引入的全部依赖。

package com.mongodbtest.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
import org.bson.types.ObjectId;

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class Teacher {

    private ObjectId id;


    private  String  name;
}

以上部分是我的测试实体类，

```java
package com.mongodbtest.config;


import com.mongodbtest.entity.Teacher;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.stereotype.Component;

@Component
public interface TeacherRepository extends MongoRepository<Teacher, String> {
}

以上是我的mongodb操作类，

另外，

```java

```java

```java
package com.mongodbtest.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import org.springframework.data.mongodb.MongoDatabaseFactory;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.MongoTransactionManager;



@Configuration
public class Config  {

    @Bean
    MongoTransactionManager transactionManager(MongoDatabaseFactory factory){
        return new MongoTransactionManager(factory);
    }



}

最主要的是自己实现mongodb事务的时候有很多网络上的config已经过时MongoFactory  你用这个去配置的时候会提示找不到type  bean MongoFactory   这里是自己扒了源码看到的东西而且mongodb 官网也没有，这里是天坑（注意！！！！！！！！）

```java
package com.mongodbtest.entity;


import com.mongodbtest.config.TeacherRepository;
import com.mongodbtest.entity.Teacher;
import com.mongodbtest.service.TeacherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("teacher")
public class TeacherController {

    @Autowired
    MongoTemplate   mongoTemplate;
    @Autowired
    TeacherService teacherService;


    @PostMapping("teacher")
    public  Teacher   saveTeacher(@RequestBody Teacher teacher ){

        return teacherService.saveTeacherTemp(teacher);
    }
    @PostMapping("teacher001")
    public  Teacher   saveTeacher001(@RequestBody Teacher teacher ){

        return teacherService.saveTeacherTemp001(teacher);
    }




}

以上是我的controller 这里没啥看的，会的都会。

    @Transactional
    public Teacher  saveTeacherTemp001(Teacher teacher){

        Teacher save = teacherRepository.save(teacher);

       //这里是我故意想回滚的
        int io= 5/0;
        System.out.println(io);
        return save;
    }

这里的@Transactional 加上去就可以同时要记得开启事务 否则你的事务还是不会生效（顺便吐槽一下mongodb api开发的是真的麻烦）

本来是学习quarkus的单文档事务的，没想到遇到山路十八弯，然后自己搭建一个mongdb 集群又整合了一下boot ，结论是boot 能很好的支持mongodb的事务，quarkus 就不是很好的支持！
希望大家的代码都没有bug;嘿嘿！