26-RestHighLevelClient----高亮&分页&排序&指定返回字段
作者:互联网
@SpringBootTest
public class RestHighLevelClientOpsTest {
private RestHighLevelClient restHighLevelClient;
@Autowired
public RestHighLevelClientOpsTest(RestHighLevelClient restHighLevelClient) {
this.restHighLevelClient = restHighLevelClient;
}
/**
* 查询所有 分页查询 form 起始位置 size 每页展示记录的条数
*/
@Test
public void testSearch() throws IOException {
SearchRequest searchRequest = new SearchRequest("products");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.matchAllQuery())
.from(0) //起始位置:start=(page-1)*size
.size(1); //每页显示条数
searchRequest.source(sourceBuilder);
SearchResponse search = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
System.out.println("总条数:" + search.getHits().getTotalHits().value);
System.out.println("获取文档最大得分:" + search.getHits().getMaxScore());
SearchHit[] hits = search.getHits().getHits();
for (SearchHit hit : hits) {
System.out.println(hit.getSourceAsString());
}
}
/**
* 查询结果默认是按分数排序,我们可以手动指定排序规则
* 排序:按价格排序
*/
@Test
public void testSort() throws IOException {
SearchRequest searchRequest = new SearchRequest("products");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.matchAllQuery()).sort("price", SortOrder.ASC);
searchRequest.source(sourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
System.out.println("总条数:" + searchResponse.getHits().getTotalHits().value);
System.out.println("最大得分:" + searchResponse.getHits().getMaxScore());
SearchHit[] hits = searchResponse.getHits().getHits();
for (SearchHit hit : hits) {
System.out.println(hit.getSourceAsString());
}
}
/**
* 指定返回的字段
*/
@Test
public void testReturn() throws IOException {
SearchRequest searchRequest = new SearchRequest("products");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
//之所以设置两个数组,是因为如果我们字段很多的时候,我们业务需求只希望查询/排除很少一部分的字段,则只需要在查询/排除数组里面写那仅有的几个字段即可,省时省力
sourceBuilder.query(QueryBuilders.matchAllQuery()).fetchSource(new String[]{"title"}, new String[]{});//参数1:包含的字段数组 参数2:排除的字段数组
searchRequest.source(sourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
System.out.println("总条数:" + searchResponse.getHits().getTotalHits().value);
System.out.println("最大得分:" + searchResponse.getHits().getMaxScore());
SearchHit[] hits = searchResponse.getHits().getHits();
for (SearchHit hit : hits) {
System.out.println(hit.getSourceAsString());
}
}
/**
* 高亮查询
*/
@Test
public void testHighlight() throws IOException {
SearchRequest searchRequest = new SearchRequest("products");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
//高亮器
HighlightBuilder highlightBuilder = new HighlightBuilder();
highlightBuilder.requireFieldMatch(false)//因为高亮查询默认是对查询字段即description就行高亮,可以关闭字段匹配,这样就可以对查询到的多个字段(前提是有关键词并且改字段可以分词)进行高亮显示
.field("description")//若有关键字切可以分词,则可以高亮,写*可以匹配所有字段
.field("title")//若有关键字切可以分词,则可以高亮,写*可以匹配所有字段
.preTags("<span style='color:red;'>")//手动前缀标签
.postTags("</span>");
sourceBuilder.query(QueryBuilders.termQuery("description", "好吃")).highlighter(highlightBuilder);///高亮搜索
searchRequest.source(sourceBuilder);
SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
SearchHit[] hits = searchResponse.getHits().getHits();
for (SearchHit hit : hits) {
//获取高亮字段
Map<String, HighlightField> highlightFields = hit.getHighlightFields();
//如果高亮字段包含在description中
if (highlightFields.containsKey("description")){
System.out.println("description中有这个字段");
Text[] fragments = highlightFields.get("description").getFragments();
for (Text fragment : fragments) {
System.out.println(fragment);
}
}
//如果高亮字段包含在title中
if (highlightFields.containsKey("title")){
System.out.println("title中有这个字段");
Text[] fragments = highlightFields.get("title").getFragments();
for (Text fragment : fragments) {
System.out.println(fragment);
}
}
}
}
}
标签:26,getHits,searchRequest,System,sourceBuilder,----,println,RestHighLevelClient,o 来源: https://www.cnblogs.com/morehair/p/15823879.html