SpringBoot集成Elasticsearch 7.x | spring-boot-starter-data-elasticsearch 方式
SpringBoot集成Elasticsearch(spring-boot-starter-data-elasticsearch 方式)
SpringBoot集成Elasticsearch 7.x | spring-boot-starter-data-elasticsearch 方式
前言
- 由 Spring 提供,是 Spring 在 ES 官方接口基础之上的二次封装,使用简单,易于上手;
- 缺点是更新太慢,SpringBoot 2.2.x 才提供对 es7.x 的支持,版本关联性很大,不易维护;
不过在此还是讲一下 starter 启动器下的 集成步骤,万一官方更新速度加快了呢。
Java High Level Rest Client方式 去集成 Elasticsearch(这个是目前公司常用的方式)
添加maven依赖
<!--spring boot 整合 elasticsearch -->
<!--不用填写具体版本,spring boot 会自动找与之适配的 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
配置application.properties
旧版本
server.port=8091
spring.elasticsearch.rest.uris=http://127.0.0.1:9200
spring.elasticsearch.rest.username=elastic
spring.elasticsearch.rest.password=1234567
新版本(去掉了rest)
server.port=8091
spring.elasticsearch.uris=http://127.0.0.1:9200
spring.elasticsearch.username=elastic
spring.elasticsearch.password=1234567
测试实体类
创建一个员工的实体类
关键注解 @Document、@Id、@Field
package com.example.springbootfull.elasticsearch.bean;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.DateFormat;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import java.math.BigDecimal;
import java.util.Date;
/**
* 员工实体类
* @Document:作用在类上,标记实体类为文档对象。 indexName(索引名称,相当于数据库的表名称)
* @Id:作用在成员变量上,标记一个字段作为id主键。 在Elasticsearch中,文档ID是唯一的,用于标识文档。
* @Field:定义Java对象属性与Elasticsearch文档字段之间的映射关系。
* @author
*/
@Document(indexName = "employee_info")
public class EmployeeInfo {
@Id
private Long id;
/**
* 工号
*/
@Field(name = "job_no")
private String jobNo;
/**
* 姓名
*/
@Field(name = "name")
private String name;
/**
* 英文名
*/
@Field(name = "english_name")
private String englishName;
/**
* 工作岗位
*/
private String job;
/**
* 性别
*/
private Integer sex;
/**
* 年龄
*/
private Integer age;
/**
* 薪资
*/
private BigDecimal salary;
/**
* 入职时间
*/
@Field(name = "job_day", format = DateFormat.date_time)
private Date jobDay;
/**
* 备注
*/
private String remark;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getJobNo() {
return jobNo;
}
public void setJobNo(String jobNo) {
this.jobNo = jobNo;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEnglishName() {
return englishName;
}
public void setEnglishName(String englishName) {
this.englishName = englishName;
}
public String getJob() {
return job;
}
public void setJob(String job) {
this.job = job;
}
public Integer getSex() {
return sex;
}
public void setSex(Integer sex) {
this.sex = sex;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public BigDecimal getSalary() {
return salary;
}
public void setSalary(BigDecimal salary) {
this.salary = salary;
}
public Date getJobDay() {
return jobDay;
}
public void setJobDay(Date jobDay) {
this.jobDay = jobDay;
}
public String getRemark() {
return remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
public EmployeeInfo() {
}
public EmployeeInfo(Long id, String jobNo, String name, String englishName, String job, Integer sex, Integer age, BigDecimal salary, Date jobDay, String remark) {
this.id = id;
this.jobNo = jobNo;
this.name = name;
this.englishName = englishName;
this.job = job;
this.sex = sex;
this.age = age;
this.salary = salary;
this.jobDay = jobDay;
this.remark = remark;
}
@Override
public String toString() {
return "EmployeeInfo{" +
"id=" + id +
", jobNo='" + jobNo + '\'' +
", name='" + name + '\'' +
", englishName='" + englishName + '\'' +
", job='" + job + '\'' +
", sex=" + sex +
", age=" + age +
", salary=" + salary +
", jobDay=" + jobDay +
", remark='" + remark + '\'' +
'}';
}
}
方式一:继承 ElasticsearchRepository(适合简单查询)
ElasticsearchRepository 提供了一个高级的抽象,使得你可以在不编写任何实现代码的情况下,直接使用预定义的CRUD方法和查询方法。
业务层接口继承 ElasticsearchRepository 类
泛型的参数分别是实体类型和主键类型
例如:
public interface EmployeeInfoRepository extends ElasticsearchRepository<EmployeeInfo, Long> {
}
然后就可以直接使用了
直接使用
添加单个文档
package com.example.springbootfull.elasticsearch.controller;
import com.example.springbootfull.elasticsearch.bean.EmployeeInfo;
import com.example.springbootfull.elasticsearch.service.EmployeeInfoRepository;
import com.example.springbootfull.elasticsearch.service.EmployeeInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
@RestController
@RequestMapping("/employeeInfo")
public class EmployeeElasticController {
@Autowired
private EmployeeInfoRepository elasticRepository;
@RequestMapping("/save")
public String save() throws Exception {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
EmployeeInfo employeeInfo = new EmployeeInfo(6001L, "2001", "张三", "zhangsan", "Java", 1, 19, new BigDecimal("12500.01"), simpleDateFormat.parse("2019-09-10"), "备注");
elasticRepository.save(employeeInfo);
return "success";
}
}
执行后,es上面新增成功了。
想自定义自己的Repository接口
就要遵守 自定义方法命名规范
【自定义方法命名约定】:
例如:我们来按照年龄区间查询,定义这样的一个方法findByAgeBetween:
/**
* 需要继承ElasticsearchRepository接口
* 由于Item实体类中id为Long类型
*/
public interface EmployeeInfoRepository extends ElasticsearchRepository<EmployeeInfo, Long>
/**
* 方法名必须遵守SpringData的规范
* 年龄区间查询
*/
List<EmployeeInfo> findByAgeBetween(int age1, int age2);
}
然后,再通过saveAll新增多些数据,再进行自定义的方法进行查询
package com.example.springbootfull.elasticsearch.controller;
import com.example.springbootfull.elasticsearch.bean.EmployeeInfo;
import com.example.springbootfull.elasticsearch.service.EmployeeInfoRepository;
import com.example.springbootfull.elasticsearch.service.EmployeeInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
@RestController
@RequestMapping("/employeeInfo")
public class EmployeeElasticController {
@Autowired
private EmployeeInfoRepository elasticRepository;
@RequestMapping("/saveAll")
public String saveAll() throws Exception {
List<EmployeeInfo> list = new ArrayList<>();
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
list.add(new EmployeeInfo(1001L, "2001", "张三", "zhangsan", "Java", 1, 19, new BigDecimal("12500.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1002L, "2002", "李四", "lisi", "PHP", 1, 18, new BigDecimal("11600.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1003L, "2003", "王五", "wangwu", "C++", 1, 20, new BigDecimal("9900.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1004L, "2004", "赵六", "zhaoliu", "Java Leader", 1, 20, new BigDecimal("20000.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1005L, "2005", "小五", "xiaowu", "H5", 1, 17, new BigDecimal("10600.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1006L, "2006", "小六", "xaioliu", "web", 1, 20, new BigDecimal("12600.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1007L, "2007", "小七", "xiaoqi", "app", 1, 22, new BigDecimal("20000.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1008L, "2008", "小八", "xaioba", "Java", 1, 21, new BigDecimal("11000.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1009L, "2009", "小九", "xiaojiu", "Java", 1, 20, new BigDecimal("14000.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
list.add(new EmployeeInfo(1010L, "2010", "大十", "dashi", "Java", 1, 20, new BigDecimal("13000.01"), simpleDateFormat.parse("2019-09-10"), "备注"));
elasticRepository.saveAll(list);
return "success -> " + list.size();
}
@RequestMapping("/findByAgeBetween")
public String findByAgeBetween(){
elasticRepository.findByAgeBetween(10,20);
return "success";
}
}
使用 findByAgeBetween 查询后的效果
方式二:使用ElasticsearchRestTemplate(更适合用于复杂查询)
与 ElasticsearchRepository 相比,ElasticsearchRestTemplate 更适合用于复杂查询 。
比如 多个条件组合、范围查询、模糊查询、聚合查询等复杂场景
还支持分页、排序、过滤等高级功能
添加单个文档
@RestController
@RequestMapping("/employeeInfo")
public class EmployeeElasticController {
@Autowired
private ElasticsearchRestTemplate elasticsearchRestTemplate;
@RequestMapping("/template/save")
public String templateSave() throws Exception {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
EmployeeInfo employeeInfo = new EmployeeInfo(8888L, "2001", "张八", "zhangsan", "Java", 1, 19, new BigDecimal("12500.01"), simpleDateFormat.parse("2019-09-10"), "备注");
elasticsearchRestTemplate.save(employeeInfo);
return "success";
}
简单查询-通过id
@RestController
@RequestMapping("/employeeInfo")
public class EmployeeElasticController {
@Autowired
private ElasticsearchRestTemplate elasticsearchRestTemplate;
@RequestMapping("/getEmployeeInfo")
public EmployeeInfo getEmployeeInfo() {
return elasticsearchRestTemplate.get("6001", EmployeeInfo.class);
}
查询结果如下
批量添加、删除、复杂的查询 等等 其余的我就不多说了
【参考文章】
【1】SpringBoot-starter-data整合Elasticsearch
【2】SpringBoot之ElasticsearchRestTemplate常用示例
【3】Spring Data Elasticsearch篇(3):ElasticsearchRepository文档操作
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