ElasticSearch 7.X的基础教程三（整合springboot）
一、如何学习
1.1学会查看官方文档
https://www.elastic.co/guide/index.html
查看Java REST Client
点开一看，里面会有各种API
点进去Java High Level REST Client一看
大概讲了啥，英文不好，去百度翻译一下
可以看一下仓库依赖
依赖
org.elasticsearch.client
elasticsearch-rest-high-level-client
7.6.1
二、构建项目
2.1使用脚手架，新建项目
2.2填写项目名
3.3添加相关依赖
3.4目录结构
3.5修改配置
添加版本
1.8
7.6.1
给出代码
ElasticSearchConfig代码/**
* @program: es7-mo
* @description: 高级客户端注入
* @author: WEN
* @create: 2020-07-24 17:27
**/
//spring 三步骤，
// 1.找对象
// 2.放在sprig中待用
// 3.如果是springboot，先分析源码
@Configuration //创建启动配置 启动时 创建RestHighLevelClient
public class ElasticSearchConfig {
@Bean
public RestHighLevelClient restHighLevelClient(){
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("127.0.0.1", 9200, "http")));
return client;
}
}
User实体类/**
* @program: es7-mo
* @description: 用户实体类
* @author: WEN
* @create: 2020-07-24 17:28
**/
@Data
@AllArgsConstructor
@NoArgsConstructor
@Component
public class User {
private String name;
private int age;
}Es7MoApplicationTests测试类@SpringBootTest
class Es7MoApplicationTests {
// 面向对象来操作
@Autowired
@Qualifier("restHighLevelClient")
private RestHighLevelClient client;
//创建索引 PUT mo1_index
@Test
public void createIndex() throws Exception {
// 1、创建索引请求
CreateIndexRequest request = new CreateIndexRequest("mo1_index");
// 2、客户端执行请求 IndicesClient,请求后获得响应
//CreateIndexResponse createIndexResponse =client.indices().create(request, RequestOptions.DEFAULT);
CreateIndexResponse createIndexResponse = client.indices().create(request,RequestOptions.DEFAULT);
System.out.println(createIndexResponse);
}
//测试删除索引
@Test
void deleteIndex() throws IOException {
DeleteIndexRequest bnz_index = new DeleteIndexRequest("mo1_index");
AcknowledgedResponse delete = client.indices().delete(bnz_index,RequestOptions.DEFAULT);
System.out.println(delete.isAcknowledged());
}
//添加文档测试
/** 添加 依赖
* com.alibaba
* fastjson
* 1.2.62
*/
@Test
void addDocument() throws IOException {
//1.创建对象
User user = new User("赵敏", 18);
//2创建请求
IndexRequest request = new IndexRequest("mo1_index");
//3.规则 PUT /mo1_index/_doc/1
request.id("1");
request.timeout(TimeValue.timeValueSeconds(1));
request.timeout("1s");
//将数据放入请求 json
request.source(JSON.toJSONString(user), XContentType.JSON);
//客户端发送请求,获取响应的结果
IndexResponse indexResponse = client.index(request, RequestOptions.DEFAULT);
System.out.println(indexResponse.toString());
//对应我们命令返回状态created
System.out.println(indexResponse.status());
}
//获取文档 判断是否存在 GET /mo1_index/_doc/1
@Test
void testExists() throws IOException {
GetRequest getRequest = new GetRequest("mo1_index", "1");
//不获取返回_sources上下文
getRequest.fetchSourceContext(new FetchSourceContext(false));
getRequest.storedFields("_none_");
boolean exists = client.exists(getRequest, RequestOptions.DEFAULT);
System.out.println(exists);
}
// 更新文档的信息
@Test
void testUpdateRequest() throws IOException{
UpdateRequest updateRequest = new UpdateRequest("mo1_index","1");
updateRequest.timeout("1s");
User user = new User("赵敏", 8);
updateRequest.doc(JSON.toJSONString(user),XContentType.JSON);
UpdateResponse updateResponse = client.update(updateRequest,RequestOptions.DEFAULT);
System.out.println(updateResponse);
}
// 删除文档记录
@Test
void testDeleteRequest() throws IOException {
DeleteRequest request = new DeleteRequest("mo1_index","1");
request.timeout("1s");
DeleteResponse deleteResponse = client.delete(request,RequestOptions.DEFAULT);
System.out.println(deleteResponse.status());
}
//批量插入数据
@Test
void bulkRequest() throws IOException {
BulkRequest bulkRequest = new BulkRequest();
bulkRequest.timeout("10s");
ArrayList userList = new ArrayList<>();
userList.add(new User("赵敏1",17));
userList.add(new User("赵敏2",18));
userList.add(new User("赵敏3",19));
userList.add(new User("张无忌1",27));
userList.add(new User("张无忌2",28));
userList.add(new User("张无忌3",29));
//批处理请求
for (int i = 0; i 给出pom.xml代码
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.3.1.RELEASE
cn.es7.mo
es7-mo
0.0.1-SNAPSHOT
es7-mo
Demo project for Spring Boot
1.8
7.6.1
org.springframework.boot
spring-boot-starter-data-elasticsearch
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-devtools
runtime
true
org.springframework.boot
spring-boot-configuration-processor
true
org.projectlombok
lombok
true
org.springframework.boot
spring-boot-starter-test
test
org.junit.vintage
junit-vintage-engine
org.elasticsearch.client
elasticsearch-rest-high-level-client
7.6.1
com.alibaba
fastjson
1.2.68
org.springframework.boot
spring-boot-maven-plugin
测试批量删除
浏览查看
参考：https://www.bilibili.com/video/BV17a4y1x7zq?from=search&seid=16093692789696550128