示例：{"code":"test","value":{"title":"InvestMoney","body":"Pleasestartinvestingmoneyassoon...","tags":["money","invest"],"published_on":"1635096096659","friend":{"name":"zhangsan","age":14,"pets":[{"name":"dog","age":10}]},"comments":[{"name":"William","age":34,"rating":8,"comment":"Nicearticle..","commented_on":"1635096096659"},{"name":"John","age":38,"rating":9,"comment":"我读了这篇文章后开始投资。","commented_on":"1635096096659"},{"name":"Smith","age":33,"rating":7,"comment":"非常好的帖子","commented_on":"1635096096659"}]}}投影：PUTtest{"mappings":{"doc":{"properties":{"title":{"type":"text"},"body":{"type":"text"},"tags":{"type":"text"},"published_on":{"type":"date","format":"yyyy-MM-ddHH:mm:ss||yyyy-MM-dd||yyyy/MM/ddHH:mm:ss||yyyy/MM/dd||epoch_millis"},"friend":{"type":"nested","properties":{"name":{"type":"text"},"age":{"type":"long"},"pets":{"type":"nested","properties":{"name":{"type":"text"},"age":{"type":"long"}}}}},"comments":{"type":"nested","properties":{"name":{"type":"text"},"age":{"type":"long"},"rating":{"type":"long"},"comment":{"type":"text"},"commented_on":{"type":"date","format":"yyyy-MM-ddHH:mm:ss||yyyy-MM-dd||yyyy/MM/ddHH:mm:ss||yyyy/MM/dd||epoch_millis"}}},"creatorId":{"type":"text"},"creatorName":{"type":"text"},"createTime":{"type":“日期”，“格式”：“yyyy-MM-ddHH:mm:ss||yyyy-MM-dd||yyyy/MM/ddHH:mm:ss||yyyy/MM/dd||epoch_millis"},"modifierId":{"type":"text"},"modifierName":{"type":"text"},"modifyTime":{"type":"date","format":"yyyy-MM-ddHH:mm:ss||yyyy-MM-dd||yyyy/MM/ddHH:mm:ss||yyyy/MM/dd||epoch_millis"}}}}}
