Spring Data ElasticSearch JSON date format cause NullpointException-CodePudding

I'm using Spring Data ElasticSearch v4.2.x, my data was returned in JSON String.

Here is the problem,I tried to parse JSON string to Object,then I got "java.lang.NullPointerException".I have a Date field with these annotations,I'm sure this field is causing this problem:

    @Field(type = FieldType.Keyword, name = "created_at", format = DateFormat.basic_date_time, pattern = "yyyy-MM-dd HH:mm:ss")
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT 8")
    private Date createdAt;

CodePudding user response：

You defined the type as FieldType.Keyword, you would need FieldType.Date.

The @JsonFormat annotation is ignore by Spring Data Elasticsearch.

And please, stop using the old java.util.Date class and use the classes from java.time instead, they are now available since Java 8.