Spring Mongo转换器未注册-Java 学习之路

我注册了一组Mongo转换器（包括Jsr310Converters），但它没有将LocalDate转换为Date（因为canConvertFromLocalDateToDate等于false）

@Configuration
public class MongoConfig {


@Autowired
MongoDbFactory mongoDbFactory;

@Bean
public MongoTemplate mongoTemplate() throws Exception {

    MappingMongoConverter converter = new MappingMongoConverter(new DefaultDbRefResolver(mongoDbFactory),
            new MongoMappingContext());
    converter.setMapKeyDotReplacement("_");

    List<Converter<?, ?>> converters = new ArrayList<Converter<?, ?>>();
    converters.add(new GeoPointConverter());

    converters.addAll(Jsr310Converters.getConvertersToRegister());
    converters.addAll(JodaTimeConverters.getConvertersToRegister());
    converters.addAll(ThreeTenBackPortConverters.getConvertersToRegister());

    converter.setCustomConversions(new CustomConversions(CustomConversions.StoreConversions.NONE, converters));

   //is FALSE !
    boolean canConvertFromLocalDateToDate = converter.getConversionService().canConvert(LocalDate.class, Date.class); 

    MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory, converter);

    return mongoTemplate;

}

}

当我尝试使用LocalDate字段存储一些实体时，我得到一个异常：

org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.time.LocalDate] to type [java.util.Date]

1 回答

事实上，我发现在运行时我有2个MappingMongoConverter实例 . 所以我只是重用spring创建的实例而不是实例化一个新实例：@Autowired MappingMongoConverter转换器;

完整的片段是：

@Configuration
public class MongoConfig {


@Autowired 
MappingMongoConverter converter;

@Bean
public MongoTemplate mongoTemplate() throws Exception {
  // NO NEED TO INSTANTIATE NEW MappingMongoConverter 
  //MappingMongoConverter converter = new MappingMongoConverter(new DefaultDbRefResolver(mongoDbFactory), new MongoMappingContext());

  converter.setMapKeyDotReplacement("_");

  List<Converter<?, ?>> converters = new ArrayList<Converter<?, ?>>();
  converters.add(new GeoPointConverter());

  converters.addAll(Jsr310Converters.getConvertersToRegister());
  converters.addAll(JodaTimeConverters.getConvertersToRegister());
  converters.addAll(ThreeTenBackPortConverters.getConvertersToRegister());

  converter.setCustomConversions(new CustomConversions(CustomConversions.StoreConversions.NONE, converters));
  //is FALSE !
  boolean canConvertFromLocalDateToDate = converter.getConversionService().canConvert(LocalDate.class, Date.class); 
  converter.afterPropertiesSet();
  MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory, converter);

  return mongoTemplate;

}

回复于 2024-04-26T09:01:16+08:00

Spring Mongo转换器未注册

1 回答

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