## 一、索引的维护 如果建立的检索数据模型发生变更，需要强制的删除一次索引，然后重建之，否则，索引不会被更新，举例； ``` GET /rayphonenumber/_mapping?pretty ``` 结果： ``` { "rayphonenumber" : { "mappings" : { "properties" : { "_class" : { "type" : "keyword", "index" : false, "doc_values" : false }, "area" : { "type" : "keyword" }, "full-number" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } }, "id" : { "type" : "text", "fields" : { "keyword" : { "type" : "keyword", "ignore_above" : 256 } } }, "number" : { "type" : "keyword" }, "price" : { "type" : "long" }, "service-provider" : { "type" : "keyword" }, "sku-id" : { "type" : "long" }, "spu-id" : { "type" : "long" } } } } } ``` 其中有些字段，是在后期增加和变化的，但索引并没有随着数据变化和自动更新，可以通过强制删除索引，然后重建一次，来解决这个问题； ``` elasticsearchOperations.indexOps(PhoneNumber.class).delete() ``` 或者直接用命令： ``` DELETE /rayphonenumber ``` 然后，再重新导入数据，即可自动创建更新的索引； ``` { "rayphonenumber" : { "mappings" : { "properties" : { "_class" : { "type" : "keyword", "index" : false, "doc_values" : false }, "area" : { "type" : "text", "analyzer" : "ik_smart" }, "full-number" : { "type" : "keyword" }, "number" : { "type" : "text" }, "price" : { "type" : "long" }, "service-provider" : { "type" : "text", "analyzer" : "ik_smart" }, "sku-id" : { "type" : "long" }, "spu-id" : { "type" : "long" } } } } } ```