实验环境
- es版本:5.3.0
- spring bt版本:1.5.9
首先当然需要安装好elastic search环境,最好再安装上可视化插件 elasticsearch-head来便于我们直观地查看数据。
当然这部分可以参考本人的帖子: 《centos7上elastic search安装填坑记》
我的es安装在http://113.209.119.170:9200/这个地址(该地址需要配到springboot项目中去)
spring工程创建
这部分没有特殊要交代的,但有几个注意点一定要当心
注意在新建项目时记得勾选web和nosql中的elasticsearch依赖,来张图说明一下吧:
创建工程时勾选nosql中的es依赖选项
项目自动生成以后pom.xml中会自动添加spring-boot-starter-data-elasticsearch的依赖:
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<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-data-elasticsearch</artifactid>
</dependency>
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本项目中我们使用开源的基于restful的es java客户端jest,所以还需要在pom.xml中添加jest依赖:
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<dependency>
<groupid>io.searchbox</groupid>
<artifactid>jest</artifactid>
</dependency>
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除此之外还必须添加jna的依赖:
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<dependency>
<groupid>net.java.dev.jna</groupid>
<artifactid>jna</artifactid>
</dependency>
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否则启动spring项目的时候会报jna not found. native methods will be disabled.的错误:
jna not found. native methods will be disabled.
项目的配置文件application.yml中需要把es服务器地址配置对
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server:
port: 6325
spring:
elasticsearch:
jest:
uris:
- http: //113.209.119.170:9200 # es服务器的地址!
read-timeout: 5000
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代码组织
我的项目代码组织如下:
项目代码组织
各部分代码详解如下,注释都有:
entity.java
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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;
}
}
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testservice.java
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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);
}
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testserviceimpl.java
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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;
@service
public 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_name).type(entity.type).build();
try {
jestclient.execute(index);
logger.info( "es 插入完成" );
} catch (ioexception e) {
e.printstacktrace();
logger.error(e.getmessage());
}
}
/**
* 批量保存内容到es
*/
@override
public void saveentity(list<entity> entitylist) {
bulk.builder 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 插入完成" );
} catch (ioexception e) {
e.printstacktrace();
logger.error(e.getmessage());
}
}
/**
* 在es中搜索内容
*/
@override
public list<entity> searchentity(string searchcontent){
searchsourcebuilder 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(entity.type).build();
try {
jestresult result = jestclient.execute(search);
return result.getsourceasobjectlist(entity. class );
} catch (ioexception e) {
logger.error(e.getmessage());
e.printstacktrace();
}
return null ;
}
}
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entitycontroller.java
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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.println( "save 接口" );
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;
}
}
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实际实验
增加几条数据,可以使用postman工具,也可以直接在浏览器中输入,如增加以下5条数据:
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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
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数据插入效果如下(使用可视化插件elasticsearch-head观看):
数据插入效果
我们来做一下搜索的测试:例如我要搜索关键字“南京”
我们在浏览器中输入:
http://localhost:6325/entitycontroller/search?name=南京
搜索结果如下:
关键字“南京”的搜索结果
刚才插入的5条记录中包含关键字“南京”的四条记录均被搜索出来了!
当然这里用的是standard分词方式,将每个中文都作为了一个term,凡是包含“南”、“京”关键字的记录都被搜索了出来,只是评分不同而已,当然还有其他的一些分词方式,此时需要其他分词插件的支持,此处暂不涉及,后文中再做探索。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.jianshu.com/p/8f226206ca30