今天给大家简单的介绍一下SpringBoot如何集成Elasticsearch，并简单的介绍一下基于SpringBoot模式下怎么进行简单的增删改查操作，这边增删改查操作有点类似于JPA的模式。（什么是JPA模式，大家可以自行搜索答案）
废话不多说，现在马上开始我们今天的内容。如何新建Springboot项目我这边就不废话了，不会的同学可以看我以前写的教程。
文章地址：https://blog.csdn.net/linzhiqiang0316/article/details/79177132
1.首先是引入相关的依赖，下面是我的pom文件。
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>ElasticSearch</name> <description>ElasticSearch project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.2.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson --> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.0</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-elasticsearch --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-elasticsearch</artifactId> <version>2.0.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
pom.xml文件中最重要的其实就是引入ES（Elasticsearch的简称后面我都这么叫），也就是spring-boot-starter-data-elasticsearch 依赖。
2.接下来就是对应的配置文件了，具体配置文件如下所示：
# elasticsearch集群名称，默认的是elasticsearch spring.data.elasticsearch.cluster-name=my-application #节点的地址 注意api模式下端口号是9300，千万不要写成9200 spring.data.elasticsearch.cluster-nodes=192.168.11.24:9300 #是否开启本地存储 spring.data.elasticsearch.repositories.enable=true
3.索引对应的实体类如下所示：
package com.elasticsearch.entity;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
/**
* @author linzhiqiang
* @date 2018/5/16
*/
@Document(indexName = "company",type = "employee", shards = 1,replicas = 0, refreshInterval = "-1")
public class Employee {
@Id
private String id;
@Field
private String firstName;
@Field
private String lastName;
@Field
private Integer age = 0;
@Field
private String about;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getAbout() {
return about;
}
public void setAbout(String about) {
this.about = about;
}
}
4.实体类对应的dao接口如下所示：
package com.elasticsearch.dao;
/**
* Created by 19130 on 2018/5/16.
*/
import com.elasticsearch.entity.Employee;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Component;
/**
* @author linzhiqiang
*/
@Component
public interface EmployeeRepository extends ElasticsearchRepository<Employee,String>{
/**
* 查询雇员信息
* @param id
* @return
*/
Employee queryEmployeeById(String id);
}
5.实体类对应的控制类如下所示：
package com.elasticsearch.controller;
import com.elasticsearch.dao.EmployeeRepository;
import com.elasticsearch.entity.Employee;
import com.google.gson.Gson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author linzhiqiang
*/
@RestController
@RequestMapping("es")
public class EmployeeController {
@Autowired
private EmployeeRepository employeeRepository;
/**
* 添加
* @return
*/
@RequestMapping("add")
public String add() {
Employee employee = new Employee();
employee.setId("1");
employee.setFirstName("xuxu");
employee.setLastName("zh");
employee.setAge(26);
employee.setAbout("i am in peking");
employeeRepository.save(employee);
System.err.println("add a obj");
return "success";
}
/**
* 删除
* @return
*/
@RequestMapping("delete")
public String delete() {
Employee employee = employeeRepository.queryEmployeeById("1");
employeeRepository.delete(employee);
return "success";
}
/**
* 局部更新
* @return
*/
@RequestMapping("update")
public String update() {
Employee employee = employeeRepository.queryEmployeeById("1");
employee.setFirstName("哈哈");
employeeRepository.save(employee);
System.err.println("update a obj");
return "success";
}
/**
* 查询
* @return
*/
@RequestMapping("query")
public Employee query() {
Employee accountInfo = employeeRepository.queryEmployeeById("1");
System.err.println(new Gson().toJson(accountInfo));
return accountInfo;
}
}
以上所有的增删改查操作都要基于搭建好的ES系统（关于Linux上面如何搭建ES系统大家可以自行google）
关于我踩过的坑：
1.ES中API的端口号是9300而不是9200。
2.ES系统中Elasticsearch.yml配置文件中要加入network.host: 0.0.0.0，否则外网地址访问不了。
3.最新的资料一定要去官网上面查看，博客上面好多都是过时的。官网地址：https://www.elastic.co
4.注意JDK、ES、Springboot三者之间的版本，很多时候错误都是版本冲突引起的。
下一节课程将会给大家介绍一下，Java是如何通过ES提供的API进行索引的增删改查操作。（和今天的模式不一样哦）
对文章有什么疑问或者想要看更多文章可以加我订阅号，欢迎大家的踩踩~
