文章目录
介绍
ElasticSearch环境搭建
拉取elasticsearch镜像
启动单个节点的
为ElasticSearch创建docker网络
启动ElasticSearch
初次启动生成密码重置
从docker镜像容器中复制安全证书到本地机器
连接测试
设置虚拟机参数
postman测试
创建索引
查看所有的索引
查看单个索引
删除索引
添加数据
查询所有的文档
springboot整合data-elasticsearch
依赖
yml配置
config配置类
dao层
服务类
服务实现类
controller类
介绍
很容易理解，search名字，顾名思义就是搜索的意思，搜索的场景很多，我们在填写表单的时候搜索地图地点，购买商品的时候筛选商品等。这种匹配需要模糊匹配，根据权重进行匹配达到我们搜索的目的，传统的访问关系型数据库没法满足,于是出现了新的技术ElasticSearch。
ElasticSearch环境搭建
环境搭建的话，我们还是在docker中进行安装。
拉取elasticsearch镜像
docker pull docker.elastic.co/elasticsearch/elasticsearch:8.4.1
启动单个节点的
为ElasticSearch创建docker网络
docker network create elastic
## bddc04060de42a369112000bec26954c1404c1c163af163620eb949af5f254e9
启动ElasticSearch
-e “discovery.type=single-node”
docker run --name elasticsearch --net elastic -p 9200:9200 -p 9300:9300 -it -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:8.4.1
初次启动生成密码重置
-u表示需要修改的用户名
-i 表示交互式，可以自己指定密码，默认的是系统自动分配。
docker exec -it elasticsearch /usr/share/elasticsearch/bin/elasticsearch-reset-password -u -i
改成功之后，启动成功，可以浏览器端进行访问，输入用户名和密码
从docker镜像容器中复制安全证书到本地机器
docker cp elasticsearch:/usr/share/elasticsearch/config/certs/http_ca.crt .
连接测试
curl --cacert http_ca.crt -u elastic https://localhost:9200
设置虚拟机参数
docker run -e CLI_JAVA_OPTS="-Xms1g -Xmx1g" -e ENROLLMENT_TOKEN="<token>" --name es02 -p 9201:9200 --net elastic -it docker.elastic.co/elasticsearch/elasticsearch:docker.elastic.co/elasticsearch/elasticsearch:8.4.1
postman测试
创建索引
Put请求
http://192.168.5.130:9200/city
成功返回结果
{
"acknowledged": true,
"shards_acknowledged": true,
"index": "product"
}
查看所有的索引
Get请求
http://192.168.5.130:9200/_cat/indices?v
返回所有的索引health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
yellow open product txt1I7pbQG2RkSV86kyfAQ 1 1 0 0 225b 225b
yellow open city t6roDc9BQ2iG7Ls4Yuw-ZQ 1 1 0 0 225b 225b
查看单个索引
地址后边加上索引的名字
http://192.168.5.130:9200/product
{
"product": {
"aliases": {},
"mappings": {},
"settings": {
"index": {
"routing": {
"allocation": {
"include": {
"_tier_preference": "data_content"
}
}
},
"number_of_shards": "1",
"provided_name": "product",
"creation_date": "1662106626639",
"number_of_replicas": "1",
"uuid": "txt1I7pbQG2RkSV86kyfAQ",
"version": {
"created": "8040199"
}
}
}
}
}
删除索引
delete 请求
http://192.168.5.130:9200/city
{
"acknowledged": true
}
删除再次查看会
{
"error": {
"root_cause": [
{
"type": "index_not_found_exception",
"reason": "no such index [city]",
"resource.type": "index_or_alias",
"resource.id": "city",
"index_uuid": "_na_",
"index": "city"
}
],
"type": "index_not_found_exception",
"reason": "no such index [city]",
"resource.type": "index_or_alias",
"resource.id": "city",
"index_uuid": "_na_",
"index": "city"
},
"status": 404
}
添加数据
post请求
http://192.168.5.130:9200/product/_doc
body中存放json
{
"title": "联想拯救者",
"category": "电脑",
"desc": "拯救者带你起飞",
"price": 8999.0
}
返回结果：
{
"_index": "product",
"_id": "DcVT_YIBztDygxIIGOjO",
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 0,
"_primary_term": 1
}
查询所有的文档
Get请求：http://192.168.5.130:9200/product/_search
输入参数：
{
"query":{
"match_all":{}
}
}
{
"took": 7,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 2,
"relation": "eq"
},
"max_score": 1,
"hits": [
{
"_index": "product",
"_id": "DcVT_YIBztDygxIIGOjO",
"_score": 1,
"_source": {
"title": "联想拯救者",
"category": "电脑",
"desc": "拯救者带你起飞",
"price": 8999
}
},
{
"_index": "product",
"_id": "DsVV_YIBztDygxIIleg1",
"_score": 1,
"_source": {
"title": "DELL",
"category": "电脑",
"desc": "DELL全新技术",
"price": 7999
}
}
]
}
}
其他操作在这里不在讲解，详细的可以看看官网的。
springboot整合data-elasticsearch
依赖
<!-- SpringBootElasticsearch依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
yml配置
##配置es ip和端口
elasticsearch:
host: 192.168.5.130
port: 9200
config配置类
/**
* 配置类
*/
@ConfigurationProperties(prefix = "elasticsearch")
@Configuration
@Data
public class EsConfig extends AbstractElasticsearchConfiguration {
private String host;
private Integer port;
@Override
public RestHighLevelClient elasticsearchClient() {
RestClientBuilder restClientBuilder = RestClient.builder(new HttpHost(host,port));
RestHighLevelClient restHighLevelClient = new RestHighLevelClient(restClientBuilder);
return restHighLevelClient;
}
}
dao层
/**
* 持久化类
* 操作文档
*/
public interface ProductDao extends ElasticsearchRepository<Product,Long> {
}
服务类
/**
* 服务接口类
*/
public interface IProductService {
//保存
void saveProduct(Product product);
//更新
void updateProduct(Product product);
//根据
Product getProductById(Long id);
//获取商品列表
List<Product> getProductList();
//删除商品
void deleteProductById(Long id);
}
服务实现类
/**
* 接口服务实现类
*/
@Service
public class IProductServiceImpl implements IProductService {
@Autowired
ProductDao productDao;
/**
* 保存商品
* @param product
*/
@Override
public void saveProduct(Product product) {
productDao.save(product);
}
/**
* 更新商品
* @param product
*/
@Override
public void updateProduct(Product product) {
productDao.save(product);
}
/**
* 根据ID获取
* @param id
* @return
*/
@Override
public Product getProductById(Long id) {
return productDao.findById(id).get();
}
/**
* 获取商品列表
* @return
*/
@Override
public List<Product> getProductList() {
Iterable<Product> products = productDao.findAll();
List<Product> productList = new ArrayList<>();
for(Product product:products){
productList.add(product);
}
return productList;
}
/**
* 删除商品
* @param id
*/
@Override
public void deleteProductById(Long id) {
productDao.deleteById(id);
}
}
controller类
/**
* es 控制类
*/
@RestController
public class ESController {
@Autowired
IProductService productService;
@GetMapping("/welcome")
public String test(){
return "hello,welcome to es world!";
}
/**
* 保存
* @param product
* @return
*/
@PostMapping("/saveProduct")
public String saveProduct(@RequestBody Product product){
productService.saveProduct(product);
return "save success";
}
/**
* 更新商品
* @param product
* @return
*/
@PutMapping("/updateProduct")
public String updateProduct(@RequestBody Product product){
productService.saveProduct(product);
return "update success";
}
/**
* 获取单个商品
* @param id
* @return
*/
@GetMapping("/getProductById/{ProductId}")
public Product getProductById(@PathVariable("ProductId") Long id){
Product product = productService.getProductById(id);
return product;
}
/**
* 获取商品列表
* @return
*/
@GetMapping("/getProductList")
public List<Product> getProductList(){
return productService.getProductList();
}
/**
* 删除商品
*/
@DeleteMapping("/deleteProductById/{productId}")
public String deleteProductById(@PathVariable("productId") Long id){
productService.deleteProductById(id);
return "delete success";
}
}
