Spring boot集成Elasticsearch报错

问题：当实体类设置日期类型为Date时，保存数据没问题，查询时报错

报错内容如下：

java.time.DateTimeException: Unable to obtain Instant from TemporalAccessor: {},ISO resolved to 2007-08-09 of type java.time.format.Parsed

	at java.time.Instant.from(Instant.java:378)
	at org.springframework.data.elasticsearch.core.convert.ElasticsearchDateConverter.parse(ElasticsearchDateConverter.java:125)
	at org.springframework.data.elasticsearch.core.mapping.SimpleElasticsearchPersistentProperty$1.read(SimpleElasticsearchPersistentProperty.java:160)
	at org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter.readValue(MappingElasticsearchConverter.java:281)
	at org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter$ElasticsearchPropertyValueProvider.getPropertyValue(MappingElasticsearchConverter.java:869)
	at org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter.readProperties(MappingElasticsearchConverter.java:260)
	at org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter.readEntity(MappingElasticsearchConverter.java:192)
	at org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter.read(MappingElasticsearchConverter.java:172)
	at org.springframework.data.elasticsearch.core.convert.MappingElasticsearchConverter.read(MappingElasticsearchConverter.java:81)
	at org.springframework.data.elasticsearch.core.AbstractElasticsearchTemplate$ReadDocumentCallback.doWith(AbstractElasticsearchTemplate.java:602)
	at org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate.get(ElasticsearchRestTemplate.java:166)

解决的方法：

      我看到网上很多文章的解决办法是用LocalDateTime替换Date但是我使用这个办法时候 瞎报错，很多办法试了都不行，于是按照数据库的那种思想  数据库中date类型的数据 Java实体类可以拿String装，后期如果一定要操作时间的话 还可以转回去。所以这次我的解决的办法也是这样，上代码：

  @Field(type = FieldType.Text,index = false)
  private String openTime;

于是就完美的解决了问题  数据查询出来了。