Solr 刪除全部索引：
curl "http://172.16.0.131:8080/solr/customer_user/update/" -d "stream.body=<delete><query>*:*</query></delete>&stream.contentType=text/xml;charset=utf-8&commit=true"
solr 刪除指定ID的索引：http://localhost:8080/solr/update/?stream.body=<delete><id>1</id></delete>&stream.contentType=text/xml;charset=utf-8&commit=true