Building Elasticsearch's mapping through Java's domain class

Create your own elasticsearch mapping by giving a class of Java

Order's Domain Class

 Public class Order {    public  String system_id;      Public String finger_id;      Public String merchant_id;      Public Double Tx_money;      Public String pay_date;      Public String payment_status;      Public Date settle_date;      Public Long Goods_count;}

Mapping startup class for building Elasticsearch

 Public classstartmapping {Private StaticLog log = Logfactory.getlog (startmapping.class); Private StaticTransportclient client =NULL; Private Staticindicesadminclient adminclient; Private StaticTransportclient getclient ()throwsunknownhostexception {Settings Settings= Settings.settingsbuilder (). Put ("Cluster.name", Constant.cluster). Build (); Transportclient Client=Transportclient.builder (). settings (Settings). build (); Client.addtransportaddress (Newinetsockettransportaddress (Inetaddress.getbyname (constant.eshost), constant.esport)); returnclient; }        Static{        Try{Client=getclient (); } Catch(unknownhostexception e) {e.printstacktrace (); }    }     Public Static voidMain (string[] args) {//elasticsearch-mapping Builddomapping (); }        /*** Determine if an index in Elasticsearch exists*/    Private Static Booleanexists (String index) {adminclient=client.admin (). indices (); Indicesexistsrequest Request=Newindicesexistsrequest (index); Indicesexistsresponse Response=adminclient.exists (Request). Actionget (); if(Response.isexists ()) {return true; }          return false; }          Private Static voiddomapping () {if(Exists (Constant.index)) {System.out.println (Constant.index+ "Index already exists! "); Log.info (Constant.index+ "Index already exists! "); return; } String Template= "{\ n" + "\t\" "+constant.index+" \ ": {\ n" + "\t\t\" properties\ ": {                                \ n "+" \t\t{#}\n "+" \t\t\t\t}\n " + "\t\t}\n" + "}"; String fieldstring=getclassmapping (); Template= Template.replace ("{#}", fieldstring);        Client.admin (). Indices (). Preparecreate (Constant.index). addmapping (Constant.index, template). get ();        System.out.println (template); System.out.println ("Create Elasticsearch mapping complete!!!" "); Log.info ("Create Elasticsearch mapping complete!!!" "); }        /*** fields in Elasticsearch from the field mapping of the class *@return     */     Public StaticString getclassmapping () {StringBuilder fieldstring=NewStringBuilder (); Field[] Fields= Order.class. Getdeclaredfields ();  for(inti = 0; i < fields.length; i++) {fieldstring.append ("\t\t\t\t\" "+ fields[i].getname (). toLowerCase () +" \ ": {\ n"); Fieldstring.append ("\t\t\t\t\t\t\" type\ ": \" "+ Getelasticsearchmappingtype (Fields[i].gettype (). Getsimplename ()) +" \ n "); if(i = = Fields.length-1) {fieldstring.append ("\t\t\t\t\t}\n"); } Else{fieldstring.append ("\t\t\t\t\t},\n"); }        }        returnfieldstring.tostring (); }    Private Staticstring Getelasticsearchmappingtype (String varType) {string es= "String"; Switch(varType) { Case"Date": Es= "Date\" \ n "+" \t\t\t\t\t\t,\ "format\": \ "Yyyy-mm-dd hh:mm:ss\" \ n "+" \t\t\t\t\t\t,\ "null_value\": \ "1900-01-01 00:00:01\ "";  Break;  Case"Double": Es= "Double\" \ n "+" \t\t\t\t\t\t,\ "null_value\": \ "nan\" ";  Break;  Case"Long": Es= "Long\" ";  Break; default: Es= "String\" ";  Break; }        returnes; }      }

About Elasticsearch mapping fields manually added
Curl-xput http://192.168.46.165:9200/t_order/_mapping/t_order?pretty-d ' {"Properties": {"order_ip": {"type": " String "}}} '

Building Elasticsearch's mapping through Java's domain class