The practice of Elastic search engine in Springboot

Experimental environment

• ES version: 5.3.0
• Spring BT version: 1.5.9

First of all, of course you need to install the elastic search environment, it is best to install the visual plug-in Elasticsearch-head to enable us to visually view the data.

Of course, this section can refer to my post:
"Centos7 on Elastic search installation Pits Kee"
Https://www.jianshu.com/p/04f4d7b4a1d3

My ES is installed in the Http://113.209.119.170:9200/address (this address needs to be in the Springboot project)

Spring Project Creation

There is no special explanation for this part, but there are a few points to watch out for.

• Note that when you create a new project, check the web and NoSQL elasticsearch dependencies, and take a look at the diagram:

Dependencies that are automatically added in Pom.xml after the project is automatically generated spring-boot-starter-data-elasticsearch :

        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>        </dependency>

• In this project we use the open source RESTful es java client jest , so we also need to add dependencies in Pom.xml jest :

      <dependency>        <groupId>io.searchbox</groupId>        <artifactId>jest</artifactId>    </dependency>

• In addition to the dependencies you must add jna :

      <dependency>        <groupId>net.java.dev.jna</groupId>        <artifactId>jna</artifactId>    </dependency>

Otherwise the error will be reported when starting the Spring project JNA not found. native methods will be disabled. :

• You need to configure the ES server address in the configuration file application.yml of the project to

  server:port: 6325

Spring
Elasticsearch
Jest
URIs

• http://113.209.119.170:9200 # ES server's address!
  read-timeout:5000

Code Organization

My project code is organized as follows:

Each part of the code is described below, comments are:

• Entity.java

package com.hansonwang99.springboot_es_demo.entity;import java.io.Serializable;import org.springframework.data.elasticsearch.annotations.Document;public class Entity implements Serializable{    private static final long serialVersionUID = -763638353551774166L;    public static final String INDEX_NAME = "index_entity";    public static final String TYPE = "tstype";    private Long id;    private String name;    public Entity() {        super();    }    public Entity(Long id, String name) {        this.id = id;        this.name = name;    }    public Long getId() {        return id;    }    public void setId(Long id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

• Testservice.java

package com.hansonwang99.springboot_es_demo.service;import com.hansonwang99.springboot_es_demo.entity.Entity;import java.util.List;public interface TestService {    void saveEntity(Entity entity);    void saveEntity(List<Entity> entityList);    List<Entity> searchEntity(String searchContent);}

• Testserviceimpl.java

Package Com.hansonwang99.springboot_es_demo.service.impl;import Java.io.ioexception;import Java.util.List;import Com.hansonwang99.springboot_es_demo.entity.entity;import Com.hansonwang99.springboot_es_ Demo.service.testservice;import Org.elasticsearch.index.query.querybuilders;import Org.elasticsearch.search.builder.searchsourcebuilder;import Org.slf4j.logger;import org.slf4j.LoggerFactory; Import Org.springframework.beans.factory.annotation.autowired;import Org.springframework.stereotype.Service; Import Io.searchbox.client.jestclient;import Io.searchbox.client.jestresult;import Io.searchbox.core.bulk;import Io.searchbox.core.index;import Io.searchbox.core.Search; @Servicepublic class Testserviceimpl implements Testservice    {private static final Logger Logger = Loggerfactory.getlogger (Testserviceimpl.class);    @Autowired private jestclient jestclient; @Override public void Saveentity (entity entity) {Index index = new Index.builder (entity). Index (Entity.index_nam E). Type (Entity.type). build ();            try {jestclient.execute (index);        Logger.info ("ES insert Complete");            } catch (IOException e) {e.printstacktrace ();        Logger.error (E.getmessage ()); }}/** * Bulk save content to ES */@Override public void saveentity (list<entity> entitylist) {bulk.b        Uilder bulk = new Bulk.builder (); for (entity Entity:entitylist) {Index index = new Index.builder (entity). Index (Entity.index_name). Type (entity.            TYPE). build ();        Bulk.addaction (index);            } try {Jestclient.execute (Bulk.build ());        Logger.info ("ES insert Complete");            } catch (IOException e) {e.printstacktrace ();        Logger.error (E.getmessage ()); }}/** * search for content in ES * * @Override public list<entity> searchentity (String searchcontent) {S        Earchsourcebuilder Searchsourcebuilder = new Searchsourcebuilder (); Searchsourcebuilder.query (QueryBuilders.querystringquery (searchcontent));        Searchsourcebuilder.field ("name");        Searchsourcebuilder.query (Querybuilders.matchquery ("name", Searchcontent)); Search search = new Search.builder (searchsourcebuilder.tostring ()). Addindex (Entity.index_name). AddType (Ent ity.        TYPE). build ();            try {jestresult result = Jestclient.execute (search);        Return Result.getsourceasobjectlist (Entity.class);            } catch (IOException e) {logger.error (E.getmessage ());        E.printstacktrace ();    } return null; }}

• Entitycontroller.java

Package Com.hansonwang99.springboot_es_demo.controller;import Java.util.arraylist;import Java.util.List;import Com.hansonwang99.springboot_es_demo.entity.entity;import Com.hansonwang99.springboot_es_ Demo.service.testservice;import Org.apache.commons.lang.stringutils;import Org.springframework.beans.factory.annotation.autowired;import Org.springframework.web.bind.annotation.requestmapping;import Org.springframework.web.bind.annotation.requestmethod;import Org.springframework.web.bind.annotation.RestController, @RestController @requestmapping ("/entitycontroller")    public class Entitycontroller {@Autowired testservice cityesservice; @RequestMapping (value= "/save", method=requestmethod.get) public String Save (long ID, string name) {SYSTEM.OUT.P        RINTLN ("Save Interface");            if (id>0 && stringutils.isnotempty (name)) {Entity newentity = new Entity (id,name);            list<entity> addlist = new arraylist<entity> (); Addlist.add (newentity);            Cityesservice.saveentity (addlist);        return "OK";        }else {return "bad input value";        }} @RequestMapping (value= "/search", method=requestmethod.get) public list<entity> Save (String name) {        List<entity> entitylist = null;        if (stringutils.isnotempty (name)) {entitylist = cityesservice.searchentity (name);    } return entitylist; }}

Practical experiments

Add a few more data, you can use the Postman tool, or you can enter it directly in the browser, such as adding the following 5 pieces of data:

http://localhost:6325/entityController/save?id=1&name=南京中山陵http://localhost:6325/entityController/save?id=2&name=中国南京师范大学http://localhost:6325/entityController/save?id=3&name=南京夫子庙http://localhost:6325/entityController/save?id=4&name=杭州也非常不错http://localhost:6325/entityController/save?id=5&name=中国南边好像没有叫带京字的城市了

The data insertion effect is as follows (Elasticsearch-head viewing using the visual plugin):

Let's do a search test: for example I want to search the keyword "nanjing"
We enter in the browser:

http://localhost:6325/entityController/search?name=南京

The search results are as follows:

The four records that were inserted in the 5 records that contain the keyword "nanjing" are searched!

Of course, here is the standard word segmentation, will each Chinese as a term, which contains the "South", "Beijing" key word records are searched out, but the score is different, of course, there are some other word segmentation, at this time need other word-breaker support, here is not involved, After the article to do exploration.

The practice of Elastic search engine in Springboot