Elasticsearch 之mapping

{
    "mappings": {
        "doc": {
            "properties": {
                "field1": {
                      "type": "long"
                },
                "field2": {
                     "type": "keyword"   # keyword类型为不分词类型
                },
                "field3": {
                    "format": "yyyy-MM-dd HH:mm:ss",
                    "type": "date"
                },
                "field4": {
                    "type": "text"
                }
            }
        }
    }
}