Elasticsearch 入门（一）

添加 Maven 依赖初始化客户端配置查询数据

	
	    org.elasticsearch.client
	    elasticsearch-rest-high-level-client
	    7.7.1
	    
	        
	            org.elasticsearch
	            elasticsearch
	        
	    
	
	
	
	    org.elasticsearch
	    elasticsearch
	    7.7.1
	

	@Bean
	public RestHighLevelClient restHighLevelClient() {
	    RestClientBuilder builder = RestClient.builder(this.getHosts());
	    return new RestHighLevelClient(builder);
	}
	
	private HttpHost[] getHosts() {
	    String[] httpHosts = uris.split(",");
	    return Arrays.stream(httpHosts).map(item -> {
	        String[] nodes = item.split(":");
	        return new HttpHost(nodes[0], Integer.parseInt(nodes[1]));
	    }).toArray(HttpHost[]::new);
	}

spring.elasticsearch.uris=150.158.148.77:9200,150.158.148.78:9200,150.158.148.79:9200

    @Autowired
    private RestHighLevelClient client;

    @Test
    void searchTest() throws IOException {
        SearchRequest searchRequest = new SearchRequest("index-test");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.query(QueryBuilders.termQuery("username", "tommy"));
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        // 请求状态
        RestStatus status = searchResponse.status();
        // 执行时间
        Timevalue took = searchResponse.getTook();
        // 搜索结果
        SearchHit[] searchHits = searchResponse.getHits().getHits();
        for (SearchHit searchHit : searchHits) {
            String sourceAsString = searchHit.getSourceAsString();
            System.out.println(sourceAsString);
        }
    }