Elasticsearch如何创建自定义mapping？

PUT my_index   
{  
   "settings" : {  
      "number_of_shards" : 5,  
      "number_of_replicas" : 1  
   }  
  "mappings": {  
    "_doc": {   
      "properties": {   
        "title":    { "type": "text"  },   
        "name":     { "type": "text"  },   
        "age":      { "type": "integer" },    
        "created":  {  
          "type":   "date",   
          "format": "strict_date_optional_time||epoch_millis"  
        }  
      }  
    }  
  }  
}