前言
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种一棵树最好的时间是十年前，其次是现在
絮叨
昨天把简单的crud 给干完了，本来想讲讲原理的东西,但是我一想，大家都是才入门。就讲那写不好，所以我这边接着昨天的crud,把单机的搜索讲完，今天我们先讲讲Java的客户端HighLevelClient，其实我觉得应该很少人用它，但是我们公司用，所以我就写一下，明天再把JPA的方式也写一遍 下面是前面的系列文章
项目结构
pom 文件
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com</groupId> <artifactId>es</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>es</name> <url>http://maven.apache.org</url> <properties> <java.version>1.8</java.version> <elasticsearch.version>6.4.3</elasticsearch.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <!-- Spring boot 父引用 --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version> </parent> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.54</version> </dependency> <dependency> <groupId>org.elasticsearch</groupId> <artifactId>elasticsearch</artifactId> </dependency> <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-rest-high-level-client</artifactId> <version>6.4.3</version> </dependency> </dependencies> </project> 复制代码
这里主要是设置项目的最基本的东西springboot环境 high level client 版本
config 连接es的配置
package com.es.config; import java.util.ArrayList; import org.apache.http.HttpHost; import org.apache.http.client.config.RequestConfig.Builder; import org.apache.http.impl.nio.client.HttpAsyncClientBuilder; import org.elasticsearch.client.RestClient; import org.elasticsearch.client.RestClientBuilder; import org.elasticsearch.client.RestClientBuilder.HttpClientConfigCallback; import org.elasticsearch.client.RestClientBuilder.RequestConfigCallback; import org.elasticsearch.client.RestHighLevelClient; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; @Configuration public class EsConfiguration { private static String hosts = "192.168.62.145"; // 集群地址，多个用,隔开 private static int port = 9200; // 使用的端口号 private static String schema = "http"; // 使用的协议 private static ArrayList<HttpHost> hostList = null; private static int connectTimeOut = 1000; // 连接超时时间 private static int socketTimeOut = 30000; // 连接超时时间 private static int connectionRequestTimeOut = 500; // 获取连接的超时时间 private static int maxConnectNum = 100; // 最大连接数 private static int maxConnectPerRoute = 100; // 最大路由连接数 private RestClientBuilder builder; static { hostList = new ArrayList<>(); String[] hostStrs = hosts.split(","); for (String host : hostStrs) { hostList.add(new HttpHost(host, port, schema)); } } @Bean public RestHighLevelClient client() { builder = RestClient.builder(hostList.toArray(new HttpHost[0])); setConnectTimeOutConfig(); setMutiConnectConfig(); RestHighLevelClient client = new RestHighLevelClient(builder); return client; } // 异步httpclient的连接延时配置 public void setConnectTimeOutConfig() { builder.setRequestConfigCallback(new RequestConfigCallback() { @Override public Builder customizeRequestConfig(Builder requestConfigBuilder) { requestConfigBuilder.setConnectTimeout(connectTimeOut); requestConfigBuilder.setSocketTimeout(socketTimeOut); requestConfigBuilder.setConnectionRequestTimeout(connectionRequestTimeOut); return requestConfigBuilder; } }); } // 异步httpclient的连接数配置 public void setMutiConnectConfig() { builder.setHttpClientConfigCallback(new HttpClientConfigCallback() { @Override public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) { httpClientBuilder.setMaxConnTotal(maxConnectNum); httpClientBuilder.setMaxConnPerRoute(maxConnectPerRoute); return httpClientBuilder; } }); } } 复制代码
创建一个启动类EsApp
package com.es; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class EsApp { public static void main(String[] args) { SpringApplication.run(EsApp.class, args); } } 复制代码
创建一个bean
package com.es.bean; public class Tests { private Long id; private String name; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "Tests [id=" + id + ", name=" + name + "]"; } } 复制代码
测试方法
创建一个索引
@Autowired private RestHighLevelClient client; /** * 创建索引 * @param * @throws IOException */ @Test public void createIndex() throws IOException { CreateIndexRequest request = new CreateIndexRequest("六脉神剑"); CreateIndexResponse createIndexResponse = client.indices().create(request, RequestOptions.DEFAULT); System.out.println("createIndex: " + JSON.toJSONString(createIndexResponse)); } 复制代码
判断索引是否存在
@Test public void existsIndex() throws IOException { GetIndexRequest request = new GetIndexRequest(); request.indices("六脉神剑"); boolean exists = client.indices().exists(request, RequestOptions.DEFAULT); System.out.println("existsIndex: " + exists); } 复制代码
往索引里面添加一个数据，也就是一个文档
@BeforeClass public static void before() { INDEX_TEST = "index_test"; TYPE_TEST = "type_test"; testsList = new ArrayList<>(); for (int i = 0; i < 100; i++) { tests = new Tests(); tests.setId(Long.valueOf(i)); tests.setName("this is the test " + i); testsList.add(tests); } } @Test public void add() throws IOException { IndexRequest indexRequest = new IndexRequest("六脉神剑", "六脉神剑", tests.getId().toString()); indexRequest.source(JSON.toJSONString(tests), XContentType.JSON); IndexResponse indexResponse = client.index(indexRequest, RequestOptions.DEFAULT); System.out.println("add: " + JSON.toJSONString(indexResponse)); } 复制代码
这个beforeClass 是再测试方法之前把对象创建出来
查询一个文档
public void get() throws IOException { GetRequest getRequest = new GetRequest("六脉神剑", "六脉神剑", "99"); GetResponse getResponse = client.get(getRequest, RequestOptions.DEFAULT); System.out.println("get: " + JSON.toJSONString(getResponse)); } 复制代码
更新记录信息
@Test public void update() throws IOException { tests.setName(tests.getName() + "updated"); UpdateRequest request = new UpdateRequest("六脉神剑", "六脉神剑", tests.getId().toString()); request.doc(JSON.toJSONString(tests), XContentType.JSON); UpdateResponse updateResponse = client.update(request, RequestOptions.DEFAULT); System.out.println("update: " + JSON.toJSONString(updateResponse)); } 复制代码
搜索
@Test public void search() throws IOException { BoolQueryBuilder boolBuilder = QueryBuilders.boolQuery(); boolBuilder.must(QueryBuilders.matchQuery("name", "is")); // boolBuilder.must(QueryBuilders.matchQuery("id", tests.getId().toString())); SearchSourceBuilder sourceBuilder = new SearchSourceBuilder(); sourceBuilder.query(boolBuilder); sourceBuilder.from(0); sourceBuilder.size(100); // 获取记录数，默认10 sourceBuilder.fetchSource(new String[] { "id", "name" }, new String[] {}); // 第一个是获取字段，第二个是过滤的字段，默认获取全部 SearchRequest searchRequest = new SearchRequest("六脉神剑"); searchRequest.types("六脉神剑"); searchRequest.source(sourceBuilder); SearchResponse response = client.search(searchRequest, RequestOptions.DEFAULT); System.out.println("search: " + JSON.toJSONString(response)); SearchHits hits = response.getHits(); SearchHit[] searchHits = hits.getHits(); for (SearchHit hit : searchHits) { System.out.println("search -> " + hit.getSourceAsString()); } } 复制代码
批量操作
@Test public void bulk() throws IOException { // 批量增加 BulkRequest bulkAddRequest = new BulkRequest(); for (int i = 0; i < testsList.size(); i++) { tests = testsList.get(i); IndexRequest indexRequest = new IndexRequest(INDEX_TEST, TYPE_TEST, tests.getId().toString()); indexRequest.source(JSON.toJSONString(tests), XContentType.JSON); bulkAddRequest.add(indexRequest); } BulkResponse bulkAddResponse = client.bulk(bulkAddRequest, RequestOptions.DEFAULT); System.out.println("bulkAdd: " + JSON.toJSONString(bulkAddResponse)); search(INDEX_TEST, TYPE_TEST, "this"); // 批量更新 BulkRequest bulkUpdateRequest = new BulkRequest(); for (int i = 0; i < testsList.size(); i++) { tests = testsList.get(i); tests.setName(tests.getName() + " updated"); UpdateRequest updateRequest = new UpdateRequest(INDEX_TEST, TYPE_TEST, tests.getId().toString()); updateRequest.doc(JSON.toJSONString(tests), XContentType.JSON); bulkUpdateRequest.add(updateRequest); } BulkResponse bulkUpdateResponse = client.bulk(bulkUpdateRequest, RequestOptions.DEFAULT); System.out.println("bulkUpdate: " + JSON.toJSONString(bulkUpdateResponse)); search(INDEX_TEST, TYPE_TEST, "updated"); // 批量删除 BulkRequest bulkDeleteRequest = new BulkRequest(); for (int i = 0; i < testsList.size(); i++) { tests = testsList.get(i); DeleteRequest deleteRequest = new DeleteRequest(INDEX_TEST, TYPE_TEST, tests.getId().toString()); bulkDeleteRequest.add(deleteRequest); } BulkResponse bulkDeleteResponse = client.bulk(bulkDeleteRequest, RequestOptions.DEFAULT); System.out.println("bulkDelete: " + JSON.toJSONString(bulkDeleteResponse)); search(INDEX_TEST, TYPE_TEST, "this"); } 复制代码
结尾
今天就稍微讲了下这个的增删改查，只能说带大家入个门，后面的学习还是要靠自己了.
