Elastic Stack：es JavaApi搜索入门

一.入门API

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@SpringBootTest(classes = SearchApplication.class) @RunWith(SpringRunner.class) public class TestSearch {     @Qualifier("restHighLevelClient")     @Autowired     RestHighLevelClient client;       @Test     public void testSearchAll() throws IOException {         //构建搜索请求         SearchRequest request = new SearchRequest("book");         //构建搜索请求体         SearchSourceBuilder builder = new SearchSourceBuilder();         builder.query(QueryBuilders.matchAllQuery());         //第一个参数：包含哪些字段  第二个参数：排除哪些字段         builder.fetchSource(new String[]{},new String[]{"pic","timestamp"});         request.source(builder);         //执行搜索请求         SearchResponse response = client.search(request, RequestOptions.DEFAULT);         //获取结果         SearchHits hits = response.getHits();         SearchHit[] hits1 = hits.getHits();         Arrays.asList(hits1).forEach(hit->{             System.out.println(hit.getId());             System.out.println(hit.getScore());             Map<String, Object> map = hit.getSourceAsMap();             map.forEach((x,y)-> System.out.println(x+":"+y));             System.out.println("==========");         });     } }

 二.常用方法

分页：

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1 2	builder.from(0); builder.size(2);

 ids查询：

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1	builder.query(QueryBuilders.idsQuery().addIds("1","3","5"));

match搜索：

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1	builder.query(QueryBuilders.matchQuery("name","java编程"));

multi_match搜索：

第一个参数：查询的关键字

后面的参数：查询的字段

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1	builder.query(QueryBuilders.multiMatchQuery("java","name","description"));

三.bool query查询 　

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@Test public void testSearchBool() throws IOException {     //构建搜索请求     SearchRequest request = new SearchRequest("book");     //构建搜索请求体     SearchSourceBuilder builder = new SearchSourceBuilder();     //构建bool     BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();     boolQueryBuilder.must(QueryBuilders.matchQuery("description","java"));     boolQueryBuilder.should(QueryBuilders.matchQuery("name","开发"));       builder.query(boolQueryBuilder);     //第一个参数：包含哪些字段  第二个参数：排除哪些字段     builder.fetchSource(new String[]{},new String[]{"pic","timestamp"});     request.source(builder);     //执行搜索请求     SearchResponse response = client.search(request, RequestOptions.DEFAULT);     //获取结果     SearchHits hits = response.getHits();     SearchHit[] hits1 = hits.getHits();     Arrays.asList(hits1).forEach(hit->{         System.out.println(hit.getId());         System.out.println(hit.getScore());         Map<String, Object> map = hit.getSourceAsMap();         map.forEach((x,y)-> System.out.println(x+":"+y));         System.out.println("==========");     }); }

　filter:

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1	boolQueryBuilder.filter(QueryBuilders.rangeQuery("price").gte("50").lte("90"));

 四.sort排序

　按照价格降序

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@Test public void testSearchSort() throws IOException {     //构建搜索请求     SearchRequest request = new SearchRequest("book");     //构建搜索请求体     SearchSourceBuilder builder = new SearchSourceBuilder();     builder.query(QueryBuilders.matchAllQuery());     //第一个参数：包含哪些字段  第二个参数：排除哪些字段     builder.fetchSource(new String[]{},new String[]{"pic","timestamp"});     //排序     builder.sort("price", SortOrder.DESC);     request.source(builder);     //执行搜索请求     SearchResponse response = client.search(request, RequestOptions.DEFAULT);     //获取结果     SearchHits hits = response.getHits();     SearchHit[] hits1 = hits.getHits();     Arrays.asList(hits1).forEach(hit->{         System.out.println(hit.getId());         System.out.println(hit.getScore());         Map<String, Object> map = hit.getSourceAsMap();         map.forEach((x,y)-> System.out.println(x+":"+y));         System.out.println("==========");     }); }