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SpringBoot整合Elasticsearch7.2.0的实现方法

2019-08-26 09:52 951 查看

Spring boot 2.1.X整合Elasticsearch最新版的一处问题

新版本的Spring boot 2的spring-boot-starter-data-elasticsearch中支持的Elasticsearch版本是2.X，但Elasticsearch实际上已经发展到7.2.X版本了，为了更好的使用Elasticsearch的新特性，所以弃用了spring-boot-starter-data-elasticsearch依赖，而改为直接使用Spring-data-elasticsearch，以便启用对新版本支持，目前的版本对应关系如下

Elasticsearch(ES)有两种连接方式：transport、rest。transport通过TCP方式访问ES(只支持java),rest方式通过http API 访问ES(没有语言限制)。
ES官方建议使用rest方式, transport 在7.0版本中不建议使用，在8.X的版本中废弃。

引入依赖：

<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>

application.yml配置：

elasticsearch:
ip: 192.168.52.132:9200

客户端连接配置类

package com.dc.elastic.configuration;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpHost;
import org.apache.http.client.config.RequestConfig;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Arrays;
import java.util.Objects;

/**
* 描述: 连接客户端
*
* @author leo
* @create 2019-08-25 13:22
*/
@Configuration
public class ElasticsearchRestClient
{
/**
* 超时时间设为5分钟
*/
private static final int TIME_OUT = 5 * 60 * 1000;
private static final int ADDRESS_LENGTH = 2;
private static final String HTTP_SCHEME = "http";

@Value("${elasticsearch.ip}")
String[] ipAddress;

@Bean
public RestClientBuilder restClientBuilder() {
System.err.println(ipAddress);
HttpHost[] hosts = Arrays.stream(ipAddress)
.map(this::makeHttpHost)
.filter(Objects::nonNull)
.toArray(HttpHost[]::new);
return RestClient.builder(hosts);
}

@Bean(name = "highLevelClient")
public RestHighLevelClient highLevelClient(@Autowired RestClientBuilder restClientBuilder) {
restClientBuilder.setRequestConfigCallback(
new RestClientBuilder.RequestConfigCallback() {
@Override
public RequestConfig.Builder customizeRequestConfig(
RequestConfig.Builder requestConfigBuilder) {
return requestConfigBuilder.setSocketTimeout(TIME_OUT);
}
});
//TODO 此处可以进行其它操作
return new RestHighLevelClient(restClientBuilder);
}

private HttpHost makeHttpHost(String s) {
assert StringUtils.isNotEmpty(s);
String[] address = s.split(":");
if (address.length == ADDRESS_LENGTH) {
String ip = address[0];
int port = Integer.parseInt(address[1]);
System.err.println(ip+"+"+port);
return new HttpHost(ip, port, HTTP_SCHEME);
} else {
return null;
}
}
}

测试controller

@RequestMapping("/test")
public void test(@RequestParam String keyword) {
Integer pageIndex = 1;
Integer pageSize = 5;
String indexName = "vw_ods";
Map<String, Object> data = new HashMap<>();
data.put("clearacctname", keyword);

List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
SearchRequest searchRequest = new SearchRequest(indexName);
// searchRequest.types(indexName);
queryBuilder(pageIndex, pageSize, data, indexName, searchRequest);
try {
SearchResponse response = highLevelClient.search(searchRequest, RequestOptions.DEFAULT);
for (SearchHit hit : response.getHits().getHits()) {
Map<String, Object> map = hit.getSourceAsMap();
map.put("id", hit.getId());
result.add(map);

// 取高亮结果
Map<String, HighlightField> highlightFields = hit.getHighlightFields();
HighlightField highlight = highlightFields.get("clearacctname");
Text[] fragments = highlight.fragments(); // 多值的字段会有多个值
String fragmentString = fragments[0].string();
System.out.println("高亮：" + fragmentString);
}
System.out.println("pageIndex:" + pageIndex);
System.out.println("pageSize:" + pageSize);
System.out.println(response.getHits().getTotalHits());
System.out.println(result.size());
for (Map<String, Object> map : result) {
System.out.println(map.get("clearacctname"));
}
} catch (IOException e) {
e.printStackTrace();
}
}

private void queryBuilder(Integer pageIndex, Integer pageSize, Map<String, Object> query, String indexName,
SearchRequest searchRequest) {
if (query != null && !query.keySet().isEmpty()) {
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
if (pageIndex != null && pageSize != null) {
searchSourceBuilder.size(pageSize);
if (pageIndex <= 0) {
pageIndex = 0;
}
searchSourceBuilder.from((pageIndex - 1) * pageSize);
}
BoolQueryBuilder boolBuilder = QueryBuilders.boolQuery();
query.keySet().forEach(key -> {
boolBuilder.must(QueryBuilders.matchQuery(key, query.get(key)));

});
searchSourceBuilder.query(boolBuilder);

HighlightBuilder highlightBuilder = new HighlightBuilder();
HighlightBuilder.Field highlightTitle =
new HighlightBuilder.Field("title").preTags("<strong>").postTags("</strong>");
highlightTitle.highlighterType("unified");
highlightBuilder.field(highlightTitle);
searchSourceBuilder.highlighter(highlightBuilder);

SearchRequest source = searchRequest.source(searchSourceBuilder);
}
}

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