SpringBoot MongoTemplate 去除 _class 字段

在使用SpringBoot中使用MongoTemplate时，数据库中数据会有_class字段，虽说不影响使用，但是总是看着有些碍眼。

以下就是去除_class 字段的配置类，只需将代码复制即可直接使用。

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.convert.CustomConversions;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.convert.DbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultMongoTypeMapper;
import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;

/**
* Create by JIUN·LIU at 2018/7/24
*/

@Configuration
public class MongoConfig {

@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;
}

}