Spring 框架 MongoDB 去掉_class属性字段

心已赠人 2022-12-30 01:28 130阅读 0赞

# 本文解决的问题：Spring 框架 MongoDB 去掉\_class属性字段 #

# 第一种： #

import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.ApplicationListener;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.event.ContextRefreshedEvent;
    import org.springframework.data.mongodb.core.MongoTemplate;
    import org.springframework.data.mongodb.core.convert.DefaultMongoTypeMapper;
    import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
    import org.springframework.data.mongodb.core.convert.MongoConverter;
    
    
    @Configuration
    public class ApplicationReadyListener implements ApplicationListener<ContextRefreshedEvent> {
    
        @Autowired
        MongoTemplate mongoTemplate;
    
        @Override
        public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
            MongoConverter converter = mongoTemplate.getConverter();
            if (converter.getTypeMapper().isTypeKey("_class")) {
                ((MappingMongoConverter) converter).setTypeMapper(new DefaultMongoTypeMapper(null));
            }
        }
    }

# 第二种： #

import org.springframework.beans.factory.BeanFactory;
    import org.springframework.beans.factory.NoSuchBeanDefinitionException;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.data.mongodb.MongoDbFactory;
    import org.springframework.data.mongodb.core.convert.*;
    import org.springframework.data.mongodb.core.mapping.MongoMappingContext;
    
    /**
     * MongoDBConfig
     * mongodb中去掉_class列 配置
     *
     */
    @Configuration
    public class MongoDBConfig {
    
        // 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) {
    
            }
    
            mappingConverter.setTypeMapper(new DefaultMongoTypeMapper(null));
            return mappingConverter;
        }
    }