SpringBoot 整合MongoDB

1. pom.xml Maven依赖

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

2. application.yml 配置文件

spring:
  data:
    mongodb:
      host: 127.0.0.1
      port: 27017
      username: root
      password: 123456
      # 认证库(验证用户名和密码)
      authentication-database: admin
      # 操作库
      database: db

3. 配置类

package com.ruhuanxingyun.dcy.service.manage.config;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.MongoDatabaseFactory;
import org.springframework.data.mongodb.core.convert.*;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;

/**
 * @description: MongoDB 配置类
 * @author: ruphie
 * @date: Create in 2021/4/11 14:06
 * @company: ruhuanxingyun
 */
@Configuration
public class MongoConfig {

    /**
     * 去掉_class字段
     *
     * @param factory     MongoDatabaseFactory
     * @param context     MongoMappingContext
     * @param beanFactory BeanFactory
     * @return MappingMongoConverter
     */
    @Bean
    public MappingMongoConverter mappingMongoConverter(MongoDatabaseFactory factory, MongoMappingContext context, BeanFactory beanFactory) {
        DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory);
        MappingMongoConverter mappingMongoConverter = new MappingMongoConverter(dbRefResolver, context);
        // 若选择CustomConversions类，需要注意继承类就一个才可以，否则启动报错，本项目还有redis，所以要用MongoCustomConversions类
        mappingMongoConverter.setCustomConversions(beanFactory.getBean(MongoCustomConversions.class));
        // 去掉数据库中的_class字段，_class字段旨在把document转换成Java对象时能够转换到具体的子类
        mappingMongoConverter.setTypeMapper(new DefaultMongoTypeMapper(null));

        return mappingMongoConverter;
    }

}