Elsaticsearch java基本操作

索引 基本操作
package com.orchids.elasticsearch.web.controller;import cn.hutool.core.collection.CollUtil;
import cn.hutool.json.JSONUtil;
import com.orchids.elasticsearch.web.po.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.client.indices.CreateIndexRequest;
import org.elasticsearch.client.indices.CreateIndexResponse;
import org.elasticsearch.client.indices.GetIndexRequest;
import org.elasticsearch.client.indices.GetIndexResponse;
import org.elasticsearch.cluster.metadata.MappingMetadata;
import org.elasticsearch.common.xcontent.XContentType;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;/*** @ Author qwh* @ Date 2024/7/12 19:18*/
@Slf4j
@Api(tags = "索引")
@RestController
@RequestMapping("/elastic/index")
@RequiredArgsConstructor
public class ElasticIndexController {private final RestHighLevelClient client;static final String MAPPING_TEMPLATE = "{\n" +"  \"mappings\": {\n" +"    \"properties\": {\n" +"      \"name\":{\n" +"        \"type\": \"text\",\n" +"        \"analyzer\": \"ik_max_word\"\n" +"      },\n" +"      \"age\":{\n" +"        \"type\": \"integer\"\n" +"      },\n" +"      \"sex\":{\n" +"        \"type\": \"text\"\n" +"      }\n" +"    }\n" +"  }\n" +"}";@ApiOperation("添加索引")@PostMapping("/add")public String CreateIndex(@RequestParam("index") String index) throws IOException {CreateIndexRequest request = new CreateIndexRequest(index);request.source(MAPPING_TEMPLATE, XContentType.JSON);CreateIndexResponse response = client.indices().create(request, RequestOptions.DEFAULT);log.error("response{}",response);if (response!=null){return "add index success";}else {return "add index fail";}}@ApiOperation("获取索引")@GetMapping("/get")public Map<String, Object> GetIndex(@RequestParam("index") String index) throws IOException {//创建请求对象GetIndexRequest request = new GetIndexRequest(index);//发送请求GetIndexResponse response = client.indices().get(request, RequestOptions.DEFAULT);// todo 健壮性if (client.indices().exists(request,RequestOptions.DEFAULT)){MappingMetadata data = response.getMappings().get(index);return data.getSourceAsMap();}else {return null;}}/*** 查看指定索引的映射信息。* <p>* 通过该接口，可以获取Elasticsearch中指定索引的映射设置。映射（Mapping）定义了字段的类型和分析器等配置，* 对于查询和分析数据至关重要。此方法接收一个索引名称作为参数，返回该索引的映射配置。** @param index 指定的索引名称，用于获取该索引的映射信息。* @return 包含指定索引映射配置的Map对象。* @throws IOException 如果获取映射信息时发生I/O错误。*/@ApiOperation("查看映射")@GetMapping("/mapper")public Map<String, Object> Index(@RequestParam("index") String index) throws IOException {// todo 健壮性// 创建GetIndexRequest对象，指定要获取映射信息的索引。GetIndexRequest request = new GetIndexRequest(index);// 执行请求，获取索引的映射响应。GetIndexResponse response = client.indices().get(request, RequestOptions.DEFAULT);// 从响应中提取映射配置。Map<String, MappingMetadata> mappings = response.getMappings();// 获取指定索引的映射元数据。MappingMetadata metadata = mappings.get(index);// 从映射元数据中提取源映射配置。Map<String, Object> source = metadata.getSourceAsMap();// 返回源映射配置。return source;}@ApiOperation("删除索引")@DeleteMapping("/del")public String  DeleteIndex(@RequestParam("index") String index) throws IOException {//创建请求对象DeleteIndexRequest request = new DeleteIndexRequest(index);//发送请求return client.indices().delete(request, RequestOptions.DEFAULT)!=null ? index+"删除成功" : index+"删除失败";}}
文档
package com.orchids.elasticsearch.web.controller;import cn.hutool.core.collection.CollUtil;
import cn.hutool.json.JSONUtil;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.orchids.elasticsearch.web.po.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.ElasticsearchStatusException;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetRequest;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.springframework.web.bind.annotation.*;import java.io.IOException;
import java.util.LinkedList;
import java.util.List;/*** @ Author qwh* @ Date 2024/7/12 21:31*/
@Slf4j
@Api(tags = "文档")
@RestController
@RequestMapping("/elastic/doc")
@RequiredArgsConstructor
public class ElasticDocumentController {private final RestHighLevelClient client;@ApiOperation("添加文档")@PostMapping("/add")public String addDocument(@RequestParam("index") String index, @RequestBody User user) throws IOException {if (user==null) {throw new RuntimeException("非法参数");}String jsonUser = JSONUtil.toJsonStr(user);System.out.println(jsonUser);//准备请求对象IndexRequest request = new IndexRequest(index).id(user.getName());//准备json文档request.source(jsonUser, XContentType.JSON);//发送请求 putIndexResponse response = client.index(request, RequestOptions.DEFAULT);if (response!=null){return "success";}else {return "fail";}}@ApiOperation("获取文档")@GetMapping("/get")public User getDocument(@RequestParam("id") String id,@RequestParam("index") String index) throws IOException {//准备请求对象 参数:索引库 文档idGetRequest request = new GetRequest(index).id(id);//发送请求 得到json格式响应GetResponse response = client.get(request, RequestOptions.DEFAULT);String jsonBean = response.getSourceAsString();log.error("响应response{}",jsonBean);User bean = JSONUtil.toBean(jsonBean, User.class);System.out.println(bean);return bean;}@ApiOperation("所有文档")@GetMapping("/all")public List<User> allDocument(@RequestParam String index) throws IOException {//准备请求对象 参数索引SearchRequest request = new SearchRequest(index);//请求参数request.source().query(QueryBuilders.matchAllQuery());//发送请求 并返回响应SearchResponse response = client.search(request, RequestOptions.DEFAULT);//解析响应return handleResponse(response);}private List<User> handleResponse(SearchResponse response) {SearchHits searchHits = response.getHits();//获取总条数long total = searchHits.getTotalHits().value;log.error("一共搜索到{}条数据",total);//遍历数组SearchHit[] hits = searchHits.getHits();List<User> users = new LinkedList<>();for (SearchHit hit : hits) {//得到每一个数组的_source 原始的json文档String source = hit.getSourceAsString();log.error("原始的json格式{}",source);//反序列化User user = JSONUtil.toBean(source, User.class);log.error("放序列化后json格式{}",user);users.add(user);}return users;}@ApiOperation("删除文档")@DeleteMapping("/del")public String updateDocument(@RequestParam("index") String index,@RequestParam("id")String id) throws IOException {//requestDeleteRequest request = new DeleteRequest(index,id);//修改内容DeleteResponse delete = client.delete(request, RequestOptions.DEFAULT);if (delete!=null){return "success";}else {return "fail";}}@ApiOperation("修改文档")@PostMapping("/update")public String updateDocument(@RequestParam("index") String index,@RequestBody User user) throws IOException {if (user.getName()==null) {return "id参数非法";}//requestUpdateRequest request = new UpdateRequest(index,user.getName());//修改内容request.doc("name",user.getName(),"age",user.getAge(),"sex",user.getSex());//发送请求//当es中没有对应的id 添加该idtry {//修改client.update(request, RequestOptions.DEFAULT);} catch (ElasticsearchStatusException e) {//添加String jsonUser = JSONUtil.toJsonStr(user);System.out.println(jsonUser);//准备请求对象IndexRequest req = new IndexRequest(index).id(user.getName());//准备json文档req.source(jsonUser, XContentType.JSON);//添加client.index(req,RequestOptions.DEFAULT);}return "修改成功";}@ApiOperation("批量添加")@PutMapping("/adds")public String LoadDocument() throws IOException {return "todo";
//        int current = 1;
//        int size = 100;
//        while (true){
//            Page<User> page = new Page<>(current, size);
//            List<User> users = page.getRecords();
//            if (CollUtil.isEmpty(users)) {
//                return null;
//            }
//            log.info("加载第{}页数据共{}条", current, users.size());
//            //创建request
//            BulkRequest request = new BulkRequest("user");
//            //准备参数
//            for (User user : users) {
//
//    /*            IndexRequest indexRequest = new IndexRequest().id(user.getName());
//                indexRequest.source(JSONUtil.toJsonStr(user),XContentType.JSON);
//                request.add(indexRequest);*/
//
//                request.add(new IndexRequest().id(user.getName()).source(JSONUtil.toJsonStr(user), XContentType.JSON));
//            }
//            client.bulk(request, RequestOptions.DEFAULT);
//            current++;
//        }}
}
Java client
package com.orchids.elasticsearch.web.controller;import cn.hutool.core.collection.CollUtil;
import cn.hutool.json.JSONUtil;
import com.orchids.elasticsearch.web.po.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregations;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.web.bind.annotation.*;import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;/*** @ Author qwh* @ Date 2024/7/12 21:48*/
@Slf4j
@Api(tags = "Restapi")
@RestController
@RequestMapping("/elastic/rest")
@RequiredArgsConstructor
public class ElasticRestController {private final RestHighLevelClient client;
//    @GetMapping()public void testAgg() throws IOException {// 1.创建RequestSearchRequest request = new SearchRequest("items");// 2.准备请求参数BoolQueryBuilder bool = QueryBuilders.boolQuery().filter(QueryBuilders.termQuery("category", "手机")).filter(QueryBuilders.rangeQuery("price").gte(300000));request.source().query(bool).size(0);// 3.聚合参数request.source().aggregation(AggregationBuilders.terms("brand_agg").field("brand").size(5));// 4.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 5.解析聚合结果Aggregations aggregations = response.getAggregations();// 5.1.获取品牌聚合Terms brandTerms = aggregations.get("brand_agg");// 5.2.获取聚合中的桶List<? extends Terms.Bucket> buckets = brandTerms.getBuckets();// 5.3.遍历桶内数据for (Terms.Bucket bucket : buckets) {// 5.4.获取桶内keyString brand = bucket.getKeyAsString();System.out.print("brand = " + brand);long count = bucket.getDocCount();System.out.println("; count = " + count);}}@ApiOperation("高亮查询")@GetMapping("/high") //high okpublic List<User> HighlightQuery(@ApiParam(name = "index",value = "索引",required = true) @RequestParam("index")String index,@ApiParam(name = "high",value = "高亮条件",required = true)@RequestParam("high") String high ) throws IOException {// 1.创建RequestSearchRequest request = new SearchRequest(index);// 2.组织请求参数// 2.1.query条件request.source().query(QueryBuilders.matchQuery("name", high));// 2.2.高亮条件request.source().highlighter(SearchSourceBuilder.highlight().field("name").preTags("<em>").postTags("</em>"));// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return hand(response);}private List<User> hand(SearchResponse response) {SearchHits searchHits = response.getHits();// 1.获取总条数long total = searchHits.getTotalHits().value;System.out.println("共搜索到" + total + "条数据");// 2.遍历结果数组SearchHit[] hits = searchHits.getHits();List<User> result = new LinkedList<>();for (SearchHit hit : hits) {// 3.得到_source，也就是原始json文档String source = hit.getSourceAsString();// 4.反序列化User user = JSONUtil.toBean(source, User.class);// 5.获取高亮结果Map<String, HighlightField> hfs = hit.getHighlightFields();if (CollUtil.isNotEmpty(hfs)) {// 5.1.有高亮结果，获取name的高亮结果HighlightField hf = hfs.get("name");if (hf != null) {// 5.2.获取第一个高亮结果片段，就是商品名称的高亮值String hfName = hf.getFragments()[0].string();user.setName(hfName);}}result.add(user);}return result;}@ApiOperation("分页查询")@GetMapping("/page")public List <User> pageQuery(@ApiParam(value = "索引",required = true)@RequestParam("index")String index,@ApiParam(value = "字段条件",required = true)@RequestParam("field") String field,@ApiParam(value = "当前页",required = true)@RequestParam("current")String current,@ApiParam(value = "页大小",required = true)@RequestParam("size")String size) throws IOException {// 1.创建RequestSearchRequest request = new SearchRequest(index);// 2.组织请求参数// 2.1.搜索条件参数request.source().query(QueryBuilders.matchQuery("name", field));// 2.2.排序参数request.source().sort("age", SortOrder.ASC);// 2.3.分页参数request.source().from((Integer.valueOf(current) - 1) * Integer.valueOf(size)).size(Integer.valueOf(size));// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return handleResponse(response);}private List <User> handleResponse(SearchResponse response) {SearchHits searchHits = response.getHits();// 1.获取总条数long total = searchHits.getTotalHits().value;System.out.println("共搜索到" + total + "条数据");// 2.遍历结果数组SearchHit[] hits = searchHits.getHits();List<User> result = new LinkedList<>();for (SearchHit hit : hits) {// 3.得到_source，也就是原始json文档String source = hit.getSourceAsString();// 4.反序列化并打印User user = JSONUtil.toBean(source, User.class);result.add(user);}return result;}@ApiOperation("复合条件")@GetMapping("/compare")public List<User> compareQuery(@ApiParam(value = "索引",required = true)@RequestParam("index") String index,@ApiParam(value = "名称",required = true)@RequestParam ("name")String name,@ApiParam(value = "性别",required = true)@RequestParam("sex") String sex,@ApiParam(value = "年龄",required = true)@RequestParam("age") String age)throws IOException {// 1.创建RequestSearchRequest request = new SearchRequest(index);// 2.组织请求参数// 2.1.准备bool查询BoolQueryBuilder bool = QueryBuilders.boolQuery();// 2.2.关键字搜索if (name!=null){bool.must(QueryBuilders.matchQuery("name", name));}if (sex!=null){// 2.3.品牌过滤bool.filter(QueryBuilders.termQuery("sex", sex));}// 2.4.价格过滤  gt >if (age!=null){bool.filter(QueryBuilders.rangeQuery("age").gt(age));}request.source().query(bool);// 3.发送请求SearchResponse response = client.search(request, RequestOptions.DEFAULT);// 4.解析响应return handleResponse(response);}@ApiOperation("区间查询")@GetMapping("/term")//termpublic List<User> rangeQuery(@ApiParam(value = "索引",required = true)@RequestParam String index,@ApiParam(value = "左区间",required = true)@RequestParam("gt") String gt,@ApiParam(value = "右区间",required = true)@RequestParam("lt") String lt,@ApiParam(value = "支持排序的字段",required = true)@RequestParam("field") String field) throws IOException {//创建requestSearchRequest request = new SearchRequest(index);//请求参数//todo 健壮性request.source().query(QueryBuilders.rangeQuery(field).gte(gt).lte(lt));//解析相应SearchResponse response = client.search(request, RequestOptions.DEFAULT);return handleResponse(response);}@ApiOperation("多条件查询")@GetMapping("/multi_match")//multi_match todo 待探讨public List<User> multi_matchQuery(@ApiParam(value = "包含条件1" ,required = true)@RequestParam("name1") String args1,@ApiParam(value = "包含条件2",required = true)@RequestParam("name2") String args2) throws IOException {//创建requestSearchRequest request = new SearchRequest("user");//请求参数request.source().query(QueryBuilders.multiMatchQuery("name",args1,args2));//解析相应SearchResponse response = client.search(request, RequestOptions.DEFAULT);return handleResponse(response);}@ApiOperation("match查询")@GetMapping("/match")//match okpublic List<User> matchQuery(@ApiParam(value = "索引",name = "index",required = true) @RequestParam("index")String index,@ApiParam(value ="匹配字段",name = "field",required = true)@RequestParam("field") String field) throws IOException {//创建requestSearchRequest request = new SearchRequest(index);//请求参数request.source().query(QueryBuilders.matchQuery("name",field));//解析相应SearchResponse response = client.search(request, RequestOptions.DEFAULT);return handleResponse(response);}@ApiOperation("match-all查询")@GetMapping("/match-all")//match-all okpublic List<User> SearchMatchAll(@ApiParam(value = "索引",name = "index",required = true) @RequestParam("index")String index) throws IOException {//创建requestSearchRequest request = new SearchRequest(index);//请求参数request.source().query(QueryBuilders.matchAllQuery());//解析相应SearchResponse response = client.search(request, RequestOptions.DEFAULT);return handleResponse(response);}
}
Bean
package com.orchids.elasticsearch.web.config;import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;/*** @ Author qwh* @ Date 2024/7/12 21:16*/
@Configuration
public class RestClientConfiguration {@Beanpublic RestHighLevelClient restHighLevelClient(){return new RestHighLevelClient(RestClient.builder(HttpHost.create("http://localhost:9200")));}
}
po
package com.orchids.elasticsearch.web.po;import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.*;import java.io.Serializable;/*** @ Author qwh* @ Date 2024/7/12 20:20*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@ToString
@ApiModel(description = "索引库实体")
public class User implements Serializable {@ApiModelProperty(value = "名字",name = "name",example = "二哈")
//    @NonNullprivate String name;
//    @NonNull@ApiModelProperty(value = "年龄",name = "age",example = "99")private Integer age;
//    @NonNull@ApiModelProperty(value = "性别",name = "sex",example = "男")private String sex;}
app
package com.orchids.elasticsearch;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
public class ElasticsearchApplication {public static void main(String[] args) {SpringApplication.run(ElasticsearchApplication.class, args);}}
配置类

server:port: 8080
logging:level:web: infopattern:dateformat: HH:mm:ss:SSSfile:path: "logs"
knife4j:enable: trueopenapi:title: 接口文档description: "接口文档"email: 123123i@123.cnconcat: erhaurl: https://www.orchids.loveversion: v1.0.0group:default:group-name: defaultapi-rule: packageapi-rule-resources: com.orchids.elasticsearch.web
依赖
<?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><groupId>com.orchids</groupId><artifactId>elasticsearch</artifactId><version>0.0.1-SNAPSHOT</version><name>elasticsearch</name><description>elasticsearch</description><properties><java.version>1.8</java.version><elasticsearch.version>7.12.1</elasticsearch.version><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><spring-boot.version>2.7.12</spring-boot.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.elasticsearch</groupId><artifactId>elasticsearch</artifactId><version>${elasticsearch.version}</version></dependency><dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-client</artifactId><version>${elasticsearch.version}</version></dependency><dependency><groupId>org.elasticsearch.client</groupId><artifactId>elasticsearch-rest-high-level-client</artifactId><version>${elasticsearch.version}</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>com.github.xiaoymin</groupId><artifactId>knife4j-openapi2-spring-boot-starter</artifactId><version>4.1.0</version></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-json</artifactId><version>5.8.28</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.6</version></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-dependencies</artifactId><version>${spring-boot.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.8.1</version><configuration><source>1.8</source><target>1.8</target><encoding>UTF-8</encoding></configuration></plugin><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>${spring-boot.version}</version><configuration><mainClass>com.orchids.elasticsearch.ElasticsearchApplication</mainClass><skip>true</skip></configuration><executions><execution><id>repackage</id><goals><goal>repackage</goal></goals></execution></executions></plugin></plugins></build></project>

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