import org.springframework.data.mongodb.core.convert.DbRefResolver; //导入依赖的package包/类
@Bean
public MappingMongoConverter mappingMongoConverter(MongoDbFactory factory,
		MongoMappingContext context, BeanFactory beanFactory) {
	DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory);
	MappingMongoConverter mappingConverter = new MappingMongoConverter(dbRefResolver,
			context);

	// remove _class field
	mappingConverter.setTypeMapper(new DefaultMongoTypeMapper(null));

	try {
		mappingConverter
				.setCustomConversions(beanFactory.getBean(CustomConversions.class));
	}
	catch (NoSuchBeanDefinitionException ex) {
		// Ignore
	}
	return mappingConverter;
}
 

import org.springframework.data.mongodb.core.convert.DbRefResolver; //导入依赖的package包/类
@Bean
@ConditionalOnMissingBean(MongoConverter.class)
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 ex) {
		// Ignore
	}
	return mappingConverter;
}
 

import org.springframework.data.mongodb.core.convert.DbRefResolver; //导入依赖的package包/类
@Override
@Bean
public MappingMongoConverter mappingMongoConverter() throws Exception {
	final DbRefResolver dbRefResolver = new DefaultDbRefResolver(mongoDbFactory());
	final MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, mongoMappingContext());
	converter.setCustomConversions(customConversions());
	/* converter.setMapKeyDotReplacement("\\+"); is not needed since the custom conversions perform 
	 * this tasks in the required fields, avoiding unnecessary operations */
	return converter;
}
 

import org.springframework.data.mongodb.core.convert.DbRefResolver; //导入依赖的package包/类
@Bean
public DbRefResolver dbRefResolver(@Qualifier("mongoDbFactory") MongoDbFactory mongoDbFactory) {
  return new DefaultDbRefResolver(mongoDbFactory);
}
 

import org.springframework.data.mongodb.core.convert.DbRefResolver; //导入依赖的package包/类
@Bean
public MappingMongoConverter mongoConverter(MongoMappingContext mappingContext,
                                            DbRefResolver dbRefResolver) throws Exception {
  return new MappingMongoConverter(dbRefResolver, mappingContext);
}
 

import org.springframework.data.mongodb.core.convert.DbRefResolver; //导入依赖的package包/类
/**
 * Instantiates a new Jspresso mapping mongo converter.
 *
 * @param dbRefResolver the db ref resolver
 * @param mappingContext the mapping context
 */
public JspressoMappingMongoConverter(DbRefResolver dbRefResolver,
                                     MappingContext<? extends MongoPersistentEntity<?>, MongoPersistentProperty>
                                         mappingContext) {
  super(dbRefResolver, mappingContext);
}