创建java工程访问elasticsearch

导入pom

点击查看代码

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.6</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.fch</groupId>
    <artifactId>myelasticsearch</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>myelasticsearch</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
 
        <!-- mysql:MyBatis相关依赖 -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.0.0</version>
        </dependency>
 
        <!-- mysql:mysql驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
 
        <!-- mysql:阿里巴巴数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.12</version>
        </dependency>
        <!--Elasticsearch相关依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
        <!--支持自定义es方法-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!--低于提示版本-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
            </plugin>
        </plugins>
    </build>
 
</project>
 

配置yml

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server:
  port: 8080
spring:
  application:
    #应用名称
    name: service-sms
    #数据库连接配置
  datasource:
    #配置当前使用的数据源的操作类型
    type: com.alibaba.druid.pool.DruidDataSource
    #配置MySQL的驱动程序类
    driver-class-name: com.mysql.cj.jdbc.Driver
    #数据库连接地址
    url: jdbc:mysql://xxxxxx:3306/esdb?characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
    #数据库连接用户名
    username: root
    #数据库连接密码
    password: 1111
    #进行数据库连接池的配置
    dbcp2:
      #初始化提供的连接数
      initial-size: 5
      #数据库连接池的最小维持连接数
      min-idle: 5
      #最大的连接数
      max-total: 5
      #等待连接获取的最大超时时间
      max-wait-millis: 200
      validation-query: SELECT 1
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
  data:
    elasticsearch:
      repositories:
        enabled: true
  elasticsearch:
    rest:
      uris: http://xxxxx:9200
mybatis:
  mapper-locations:
    - classpath:mapper/*.xml

RestClientConfig

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package com.fch.myelasticsearch.config;
 
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.client.ClientConfiguration;
import org.springframework.data.elasticsearch.client.RestClients;
import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;
 
@Configuration
public class RestClientConfig extends AbstractElasticsearchConfiguration {
    @Override
    @Bean
    public RestHighLevelClient elasticsearchClient() {
        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
                .connectedTo("xxxxx:9200")
                .build();
 
        return RestClients.create(clientConfiguration).rest();
    }
}

EsController

点击查看代码

package com.fch.myelasticsearch.controller;
 
import com.alibaba.druid.support.json.JSONUtils;
import com.fch.myelasticsearch.dao.ElastRepository;
import com.fch.myelasticsearch.dao.EsDao;
import com.fch.myelasticsearch.entity.EsProduct;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
 
import java.util.List;
import java.util.Optional;
 
@Controller
public class EsController {
 
    @Autowired
    private EsDao esDao;
    @Autowired
    private ElastRepository elastRepository;
 
    @RequestMapping("/test")
    @ResponseBody
    public String start(){
        List<EsProduct> all = esDao.getAll();
        System.out.println(all);
        for(EsProduct esProduct:all){
            System.out.println("esProduct:"+esProduct);
            elastRepository.save(esProduct);
        }
        return "ok";
    }
    @RequestMapping("/test1")
    @ResponseBody
    public String start1(){
        List<EsProduct> zhangsan = elastRepository.findByName("name0");
        System.out.println(zhangsan);
        return "ok1";
    }
 
    @RequestMapping("/test2")
    @ResponseBody
    public String start2(){
 
        elastRepository.deleteById("1");
        return "ok2";
    }
}
 

EsProduct

点击查看代码

package com.fch.myelasticsearch.entity;
 
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;
 
import java.io.Serializable;
@Document(indexName = "myuser",shards = 1,replicas = 0)
public class EsProduct implements Serializable{
    private static final long serialVersionUID = -1L;
 
    @Id
    private Integer id;
    @Field(type = FieldType.Text)
    private String name;
    @Field(type = FieldType.Text)
    private String sex;
    @Field(type = FieldType.Text)
    private String address;
 
    public Integer getId() {
        return id;
    }
 
    public void setId(Integer id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getSex() {
        return sex;
    }
 
    public void setSex(String sex) {
        this.sex = sex;
    }
 
    public String getAddress() {
        return address;
    }
 
    public void setAddress(String address) {
        this.address = address;
    }
 
    @Override
    public String toString() {
        return "EsProduct{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
}
 

ElastRepository，导入jpa实现像sql一样的查询

点击查看代码

package com.fch.myelasticsearch.dao;
 
import com.fch.myelasticsearch.entity.EsProduct;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
 
import java.util.List;
 
public interface ElastRepository extends ElasticsearchRepository<EsProduct,String> {
    //1.根据姓名查询
    List<EsProduct> findByName(String name);
//
//    //2.根据年龄查询
//    List<EsProduct> findByAge(Integer age);
//
//    //3.根据姓名和年龄查询
//    List<EsProduct> findByUserNameAndAge(String userName,Integer age);
//
//    //4.根据姓名或年龄查询
//    List<EsProduct> findByUserNameOrAge(String userName,Integer age);
//
//    //5.查询年龄大于等于25
//    List<EsProduct> findByAgeGreaterThanEqual(Integer age);
 
}