Elasticsearch（七）使用java代码实现es 分页 高亮 排序 查询功能
在es api中我们可以看到，其查询条件主要封在QueryBuilder中；
分页、排序、字段过滤、高亮主要封装在SourceBuilder中；
测试代码如下：
package com.xiaohui;
import org.apache.http.HttpHost;
import org.elasticsearch.action.search.MultiSearchRequest;
import org.elasticsearch.action.search.MultiSearchResponse;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.fetch.subphase.highlight.Highlighter;
import org.elasticsearch.search.sort.SortOrder;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import java.io.IOException;
import java.util.Map;
public class ESTest3 {
private RestHighLevelClient client;
@BeforeEach
public void getClient(){
client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("192.168.0.122", 9200, "http")));
}
@Test
public void matchDoc(){
QueryBuilder queryBuilder = QueryBuilders.matchQuery("title", "小米");
commonSearch(queryBuilder);
}
@Test
public void matchAllDoc(){
QueryBuilder queryBuilder = QueryBuilders.matchAllQuery();
commonSearch(queryBuilder);
}
/**
* 含 分页 排序逻辑
* @param queryBuilder
*/
private void commonSearch(QueryBuilder queryBuilder) {
//1，构建SearchRequest请求对象，指定索引库
SearchRequest searchRequest = new SearchRequest("huizi");
//2,构建SearchSourceBuilder查询对象
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
//3，构建QueryBuilder对象指定查询方式和查询条件
//4,将QuseryBuilder对象设置到SearchSourceBuilder对象中
sourceBuilder.query(queryBuilder);
//字段过滤
sourceBuilder.fetchSource(new String[]{"title","price","band","category","id"},new String[]{"images"});
//排序
sourceBuilder.sort("price", SortOrder.DESC);
//分页
sourceBuilder.from(0);
sourceBuilder.size(2);
//5，将SearchSourceBuilder设置到SearchRequest中
searchRequest.source(sourceBuilder);
try {
//6,调用方法查询数据
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
//7,解析返回结果
SearchHit[] hits = searchResponse.getHits().getHits();
for (int i = 0; i < hits.length; i++) {
System.out.println("返回的结果： " + hits[i].getSourceAsString());
}
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 高亮的处理以及解析
*/
@Test
public void hightLight() {
QueryBuilder queryBuilder = QueryBuilders.matchQuery("title", "小米");
//1，构建SearchRequest请求对象，指定索引库
SearchRequest searchRequest = new SearchRequest("huizi");
//2,构建SearchSourceBuilder查询对象
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
//高亮
HighlightBuilder highlightBuilder = new HighlightBuilder();
highlightBuilder.preTags("");
highlightBuilder.postTags(" ");
highlightBuilder.field("title");
sourceBuilder.highlighter(highlightBuilder);
//4,将QuseryBuilder对象设置到SearchSourceBuilder对象中
sourceBuilder.query(queryBuilder);
//5，将SearchSourceBuilder设置到SearchRequest中
searchRequest.source(sourceBuilder);
try {
//6,调用方法查询数据
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
//7,解析返回结果
SearchHit[] hits = searchResponse.getHits().getHits();
for (int i = 0; i < hits.length; i++) {
SearchHit hit = hits[i];
System.out.println("返回的结果： " + hit.getSourceAsString());
Map highlightFields = hit.getHighlightFields();
HighlightField highlightField = highlightFields.get("title");
Text[] fragments = highlightField.getFragments();
for (Text fragment : fragments) {
System.out.println("高亮的信息： "+fragment);
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
//多索引查询
@Test
public void mulitIndexSearch(){
SearchRequest searchRequest = new SearchRequest(new String[]{"huizi","huizi2"});
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("title", "手机");
matchQueryBuilder.minimumShouldMatch("80%");
sourceBuilder.query(matchQueryBuilder);
searchRequest.source(sourceBuilder);
try {
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
//7,解析返回结果
SearchHit[] hits = searchResponse.getHits().getHits();
for (int i = 0; i < hits.length; i++) {
System.out.println("返回的结果： " + hits[i].getSourceAsString());
}
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 批量查询
*/
@Test
public void mulitIndexSearch2(){
MultiSearchRequest request = new MultiSearchRequest();
SearchRequest firstSearchRequest = new SearchRequest(new String[]{"huizi","huizi2"});
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchQuery("title", "小米"));
firstSearchRequest.source(searchSourceBuilder);
request.add(firstSearchRequest);
SearchRequest secondSearchRequest = new SearchRequest(new String[]{"huizi","huizi2"});
searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(QueryBuilders.matchQuery("band", "大米"));
secondSearchRequest.source(searchSourceBuilder);
request.add(secondSearchRequest);
try {
MultiSearchResponse multiSearchResponse = client.msearch(request, RequestOptions.DEFAULT);
MultiSearchResponse.Item[] responses = multiSearchResponse.getResponses();
for (MultiSearchResponse.Item respons : responses) {
SearchHit[] hits = respons.getResponse().getHits().getHits();
for (int i = 0; i < hits.length; i++) {
System.out.println("返回的结果： " + hits[i].getSourceAsString());
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 布尔组合查询
*/
@Test
public void mulitIndexSearch3(){
SearchRequest searchRequest = new SearchRequest("huizi");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
BoolQueryBuilder boolQueryBuilder = new BoolQueryBuilder();
//名字-小米
MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("title", "小米").minimumShouldMatch("80%");
//品牌-小米
MatchQueryBuilder matchQueryBuilder2 = QueryBuilders.matchQuery("band", "小米").operator(Operator.AND);
//分类-化妆品
MatchQueryBuilder matchQueryBuilder3 = QueryBuilders.matchQuery("category", "化妆品");
//图片路径- jjj模糊
FuzzyQueryBuilder fuzzyQueryBuilder = QueryBuilders.fuzzyQuery("title", "小米");
//价格 必须 2699
TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("price", "2699");
boolQueryBuilder.must(matchQueryBuilder);//必须
boolQueryBuilder.must(termQueryBuilder);//必须
// boolQueryBuilder.mustNot(matchQueryBuilder2);//不能
boolQueryBuilder.should(matchQueryBuilder3);//可以
// boolQueryBuilder.filter(fuzzyQueryBuilder);//结果中过滤
sourceBuilder.query(boolQueryBuilder);
searchRequest.source(sourceBuilder);
try {
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
SearchHit[] hits = searchResponse.getHits().getHits();
for (int i = 0; i < hits.length; i++) {
System.out.println("返回的结果： " + hits[i].getSourceAsString());
}
} catch (IOException e) {
e.printStackTrace();
}
}
@AfterEach
public void close(){
if(null!= client){
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}