SpringBoot -- 集成Elasticsearch

前置工作

• 当前服务器为CentOS6.5+ 64bit

• 新建 elasticsearch用户，ES无法用root启动

• useradd -d /usr/elasticsearch -g elastic -m elasticsearch

获取elasticsearch，本文用的v2.3.4 找到要获取的版本

• ES已经有5.x版本,然而Spring data目前还只支持ES2.x版本，Springdata支持ES版本说明

了解ES与mysql的对应关系 

• index –> DB 
  
• type –> Table 
  
• Document –> row

安装Elasticsearch

用wget命令 获取elasticsearch后，直接解压到对应的目录中

修改 config下的elasticsearch.yml 
配置 cluster.name、network.host

cluster.name:nininetwork.host 0.0.0.0 #为任意都可连接
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启动ES,bin目录下

sh elasticsearch
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Springboot集成ES

新建ES module，引入 spring-boot-starter-data-elasticsearch、spring-data-elasticsearch

build.gradle

apply plugin: 'org.springframework.boot'dependencyManagement{    imports {        mavenBom "org.springframework.cloud:spring-cloud-dependencies:" + springCloudVersion        mavenBom "org.springframework.boot:spring-boot-starter:"+ springBootVersion    }}repositories {    mavenCentral()}dependencies {    compile ('org.springframework.data:spring-data-redis')    compile ('org.springframework.boot:spring-boot-starter-data-mongodb:'+springBootVersion)    compile ('org.springframework.boot:spring-boot-starter-web:'+springBootVersion)    compile('org.springframework.cloud:spring-cloud-starter-eureka')    compile ('mysql:mysql-connector-java:'+mysqlVersion)    compile ('com.alibaba:druid:'+druidVersion)    compile ('org.mybatis:mybatis-spring:'+mybatisSpringBootVersion)    compile ('org.mybatis:mybatis:'+mybatisVersion)    compile('org.springframework.boot:spring-boot-starter-log4j2')    compile ('org.springframework.boot:spring-boot-starter-thymeleaf')    compile ('net.sourceforge.nekohtml:nekohtml:'+nekoHtmlVersion)    compile('org.apache.logging.log4j:log4j-1.2-api:'+ log4jAPIVersion)    compile('org.springframework.boot:spring-boot-starter-jdbc')    compile('org.springframework.boot:spring-boot-starter-aop')    compile ('com.alibaba:fastjson:'+fastjsonVersion)    compile ('redis.clients:jedis')    compile ('org.springframework.boot:spring-boot-starter-data-elasticsearch:'+springBootVersion)    compile ('org.springframework.data:spring-data-elasticsearch')    testCompile ('org.springframework.boot:spring-boot-starter-test')    testCompile group: 'junit', name: 'junit', version: '4.11'}configurations {    all*.exclude module: 'spring-boot-starter-logging'    all*.exclude module: 'logback-classic'    all*.exclude module: 'log4j-over-slf4j'    all*.exclude module: 'snappy-java'}jar {    baseName = 'es-server-bootcwenao'}
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在application.yml中配置ES信息

application.yml

spring:    data:        elasticsearch:            cluster-name: nini            cluster-nodes: 192.168.21.1:9300            local: false            repositories:                enable: true
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创建 ES bean

用来查询获取对象，与mybatis差不多，唯独多了@Document与@Id 注解

AccountInfo.java

/** * @author cwenao * @version $Id AccountInfo.java, v 0.1 2017-02-06 10:28 cwenao Exp $$ */@Document(indexName = "cwenao",type = "accountinfo", shards = 1,replicas = 0, refreshInterval = "-1")public class AccountInfo {    @Id    private String id;    @Field    private String accountName;    @Field    private String nickName;    //getter setter ...}
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创建 Repository

用于数据查询，需要extends ElasticsearchRepository

ElasticAccountInfoRepository.java

/** * @author cwenao * @version $Id ElasticAccountInfoRepository.java, v 0.1 2017-02-06 10:26 cwenao Exp $$ */@Component("elasticAccountInfoRepository")public interface ElasticAccountInfoRepository extends ElasticsearchRepository<AccountInfo,String> {    //TODO define the search    AccountInfo findByAccountName(String accountName);}
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创建 service

ESAccountInfoService.java

/** * @author cwenao * @version $Id ESAccountInfoService.java, v 0.1 2017-02-06 10:36 cwenao Exp $$ */public interface ESAccountInfoService {    AccountInfo queryAccountInfoById(String id);    AccountInfo queryAccountInfoByName(String accountName);}
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ESAccountInfoServiceImpl.java

/** * @author cwenao * @version $Id ESAccountInfoServiceImpl.java, v 0.1 2017-02-06 10:38 cwenao Exp $$ */@Service("esAccountInfoServiceImpl")public class ESAccountInfoServiceImpl implements ESAccountInfoService {    @Autowired    private ElasticAccountInfoRepository elasticAccountInfoRepository;    public AccountInfo queryAccountInfoById(String id) {        return elasticAccountInfoRepository.findOne(id);    }    @Override    public AccountInfo queryAccountInfoByName(String accountName) {        return elasticAccountInfoRepository.findByAccountName(accountName);    }}
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创建controller

ESController.java

/** * @author cwenao * @version $Id ESController.java, v 0.1 2017-02-06 10:44 cwenao Exp $$ */@Controllerpublic class ESController {    @Autowired    private ESAccountInfoService esAccountInfoServiceImpl;    @RequestMapping("/esAccountInfo")    public String queryAccountInfo(String id, ModelMap modelMap){        AccountInfo accountInfo = esAccountInfoServiceImpl.queryAccountInfoById(id);        modelMap.addAttribute("esAccountInfo",accountInfo);        modelMap.addAttribute("test_elastic","Test the elasticsearch");        return "accountInfo";    }    @RequestMapping("/esAccountInfoName")    public String queryAccountInfoByAccountName(String accountName, ModelMap modelMap){        AccountInfo accountInfo = esAccountInfoServiceImpl.queryAccountInfoByName(accountName);        modelMap.addAttribute("esAccountInfo",accountInfo);        modelMap.addAttribute("test_elastic","Test the elasticsearch");        return "accountInfo";    }}
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在apigateway工程配置path

bootstrap.yml

zuul:  routes:    esserver:      path: /esserver/**      serviceId: ESSERVER
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apigateway/mybatis 等集成参考前面文章

测试

• 依次启动 discovery、configserver、apigateway、esserver
• 访问 http://localhost:10002/esserver/esAccountInfo?id=a63126d074f04db587cd76a48c817510

更多的查询方式

• ElasticsearchRepository提供了很有用的查询构造器
• 比如查询 去重distinct ： findDistinctAccountInfoById(String id)
• 比如条件组合 **AND/OR : findAccountInfoByIdAndAccountname(String id,accountname)
• 查询构造器会忽略 find..By 等前缀

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代码

代码请移步 Github参考地址

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