在 Postman 中，向 ES 服务器发 GET 请求

GET http://localh:9200/student/_mapping

返回JSON

{
    "student": {
        "mappings": {
            "properties": {
                "age": {
                    "type": "long",
                    "index": false
                },
                "name": {
                    "type": "text"
                },
                "sex": {
                    "type": "text",
                    "index": false
                }
            }
        }
    }
}