elasticsearch 5.1 java开发用例
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1.pom文件配置
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>5.1.1</version>
</dependency>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>5.1.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.8.1</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.8.2</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.8.2</version>
</dependency>
2.获取client方法
String clusterName="backgroup_services_ES";
String transportAddress="127.168.*.*,192.168.*.*,192.168.*.*";//填写正确的es服务器ip地址
String transportPort="9300";//默认为9300
String indexName="index1";//索引名称
//获取client
public TransportClient getTransportClient() {
// TODO Auto-generated method stub
// 设置集群名称
Settings settings = Settings.builder().put("cluster.name", clusterName).build();
// 创建client
try {
TransportClient client = new PreBuiltTransportClient(settings);
String[] addrs = transportAddress.split(",");
for (String addr : addrs) {
client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(addr), Integer.parseInt(transportPort)));
}
return client;
} catch (UnknownHostException e) {
e.printStackTrace();
}
return null;
}
3.查询示例
BoolQueryBuilder matchQuery = QueryBuilders.boolQuery();
//关键字查询
matchQuery.must(QueryBuilders.matchPhraseQuery("article_json.title", keyWorld.toLowerCase()));
//取要查询的字段
SearchSourceBuilder ssb = new SearchSourceBuilder();
ssb.fetchSource(new String[]{"article_json.title"
, "article_json.source"
, "article_json.extension_tags"
, "article_json.browsing_appraise"
, "article_json.browsing_count"
, "article_json.url_schema"
, "article_json.publish_time"
, "article_json.publish_time_2"
, "article_json.brand_info"
, "article_json.analysis_info"
}, null);
SearchRequestBuilder searchRequestBuilder = transportClient.prepareSearch(indexName)
.setSource(ssb)
.addSort("publish_time", SortOrder.DESC)
.setQuery(matchQuery)
.setFrom(100)
.setSize(10);
SearchResponse response = searchRequestBuilder.execute().actionGet();
//获取查询结果集
SearchHits searchHits = response.getHits();
//遍历结果
IndustryAnalysisOutPutBean beans = new IndustryAnalysisOutPutBean();
beans.setCount(searchHits.getTotalHits());//读取到的条数
beans.setBeans(new ArrayList<>());
for (SearchHit hit : searchHits) {
Map<String, Object> source = hit.getSource();
Map<String, Object> o = (Map<String, Object>) source.get("article_json");
if (o != null) {
IndustryAnalysisBean bean = new IndustryAnalysisBean();
bean.setTitle(o.get("title") );//标题
bean.setSource(o.get("source") );//来源
bean.setExtension_tags(o.get("extension_tags") );//位置
bean.setBrowsing_appraise(o.get("browsing_appraise") );//评论数
bean.setBrowsing_count(o.get("browsing_count") );//浏览量
bean.setUrl_schema(o.get("url_schema") );//网页地址
Date d = new Date(Long.parseLong(o.get("publish_time") ));
bean.setPublish_time_2(DateUtils.format(d, "yyyy-MM-dd HH:mm:ss"));//发布时间
beans.getBeans().add(bean);
}
}
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