springboot+mongodb去除mongodb中的_class字段，mongodb实体动态获取集合对象

「爱情、让人受尽委屈。」 2023-10-11 12:17 46阅读 0赞

## 实体 ##

//#{getCollection}调用mongodb配置中获取集合对象的方法
    @Document(collection="#{getCollection}")
    public class PhoneNumberDto { 
    
    	private String _id;
    	//新增唯一键 百万级查询效率可以从两分钟优化到几秒钟
    	@Indexed(unique = true)
    	private String phone;
    	private String name;
    	private Integer gender;
    	private String age;
    	private Integer carrier;
    	private Object source;
    	private Object project;
    	private String province;
    	private String city;
    	private JSONArray tags;
    	private String dt;	
    }

## mongodb配置 ##

/** * * <p>Title: MongoConfig</p> * <p>Description:去除MongoDB新增时自动添加_class字段</p> * @author zhouaokai * @date 2019年8月23日 */
    @Configuration
    public class MongoConfig { 
    	
    	//获取配置文件中的对象
        @Value("${spring.data.mongodb.collection}")
        private String collection;
        @Bean
        public String getCollection() { 
            return collection;
        }
    	
    	//取消_class字段
    	@Bean
        public MappingMongoConverter mappingMongoConverter(MongoDbFactory factory, MongoMappingContext context, BeanFactory beanFactory) { 
            DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory);
            MappingMongoConverter mappingConverter = new MappingMongoConverter(dbRefResolver, context);
            try { 
                mappingConverter.setCustomConversions(beanFactory.getBean(CustomConversions.class));
            } catch (NoSuchBeanDefinitionException ignore) { 
            }
    
            // Don't save _class to mongo
            mappingConverter.setTypeMapper(new DefaultMongoTypeMapper(null));
    
            return mappingConverter;
        }
    
    }

## application.properties ##

#MongoDB配置
    #mongodb地址
    spring.data.mongodb.host=localhost
    #mongodb端口号
    spring.data.mongodb.port=27017
    #mongodb数据库
    spring.data.mongodb.database=database
    #mongodb集合
    spring.data.mongodb.collection=collection