elasticsearch学习四：es基本操作命令

1. elasticSearch配置类

@Bean
    public RestHighLevelClient restHighLevelClient(){
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("127.0.0.1",9200,"http")
                )
        );
        return client;
    }

2. 测试es基本操作命令

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    /**
     * 创建索引
     * @throws IOException
     */
    @Test
    void testCreateIndex() throws IOException {
        //1、创建索引请求
        CreateIndexRequest request = new CreateIndexRequest("test_index");
        // 2、客户端执行请求
        CreateIndexResponse createIndexResponse = client.indices().create(request, RequestOptions.DEFAULT);
        System.out.println(createIndexResponse);
    }

    /**
     * 获取索引
     * @throws IOException
     */
    @Test
    void testExistIndex() throws IOException {
        GetIndexRequest request = new GetIndexRequest("test_index");
        boolean exists = client.indices().exists(request, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

    /**
     * 删除索引
     * @throws IOException
     */
    @Test
    void testDeleteIndex() throws IOException {
        DeleteIndexRequest request = new DeleteIndexRequest("test_index");
        AcknowledgedResponse response = client.indices().delete(request, RequestOptions.DEFAULT);
        System.out.println(response);
    }

    /**
     * 添加文档
     * @throws IOException
     */
    @Test
    void testAddDocument() throws IOException {
        UserEntity userEntity = new UserEntity("小米",3);
        //创建请求
        IndexRequest request = new IndexRequest("test_index");
        // 规则 put /kuang_index/_doc/1
        request.id("1");
        request.timeout(TimeValue.timeValueSeconds(1));
        request.timeout("1s");
        //添加数据
        request.source(JSON.toJSONString(userEntity), XContentType.JSON);
        //客户端发送请求
        IndexResponse response = client.index(request, RequestOptions.DEFAULT);
        System.out.println(response);
    }

    /**
     * 获取文档
     */
    @Test
    public void indexGetDocument() throws IOException {
        GetRequest getRequest = new GetRequest("test_index","1");
        GetResponse getResponse = client.get(getRequest, RequestOptions.DEFAULT);
        System.out.println(getResponse.getSourceAsString());
    }

    /**
     * 更新文档
     */
    @Test
    public void indexUpdateDocument() throws IOException {
        UpdateRequest updateRequest = new UpdateRequest("test_index","1");
        updateRequest.timeout("1s");
        UserEntity userEntity = new UserEntity("小仓",20);
        updateRequest.doc(JSON.toJSONString(userEntity),XContentType.JSON);
        UpdateResponse updateResponse = client.update(updateRequest, RequestOptions.DEFAULT);
        System.out.println(updateResponse.status());
    }

    /**
     * 删除文档
     */
    @Test
    public void indexDeleteDocument() throws IOException {
        DeleteRequest deleteRequest = new DeleteRequest("test_index", "1");
        DeleteResponse deleteResponse = client.delete(deleteRequest, RequestOptions.DEFAULT);
        System.out.println(deleteResponse.status());
    }

    /**
     * 批量插入数据
     */
    @Test
    public void addList() throws IOException {
        BulkRequest bulkRequest = new BulkRequest();
        ArrayList<UserEntity> list = new ArrayList<>();
        list.add(new UserEntity("xiaoming",19));
        list.add(new UserEntity("xiaoming2",16));
        list.add(new UserEntity("xiaoming3",12));
        list.add(new UserEntity("xiaoming4",29));
        list.add(new UserEntity("xiaoming5",14));
        list.add(new UserEntity("xiaoming6",17));
        //批量请求
        for (int i = 0; i < list.size(); i++) {
            bulkRequest.add(
                    new IndexRequest("test1")
                            .id(""+(i+1))
                            .source(JSON.toJSONString(list.get(i)),XContentType.JSON)
            );
            BulkResponse bulk = client.bulk(bulkRequest, RequestOptions.DEFAULT);
        }
    }

    /**
     * 查询数据
     */
    @Test
    public void searchList() throws IOException {
        SearchRequest searchRequest = new SearchRequest("test1");
        //构建搜索条件
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        sourceBuilder.highlighter();
        //查询条件
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "xiaoming");
        sourceBuilder.query(termQueryBuilder);
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
        System.out.println(JSON.toJSONString(searchResponse.getHits()));
        System.out.println("===========================");
        for (SearchHit documentFields : searchResponse.getHits().getHits()) {
            System.out.println(documentFields.getSourceAsString());
        }
    }

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