RestClient实现Elasticsearch的简单操作

最新推荐文章于 2025-05-18 17:27:39 发布

原创最新推荐文章于 2025-05-18 17:27:39 发布 · 1.4k 阅读

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文章标签：

#java #elasticsearch

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本文提供了一系列Elasticsearch操作的示例代码，包括创建索引、查询索引信息、删除索引等，并展示了如何使用Java进行REST API调用。

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    @Test
    public void createIndex() throws IOException {
        Request getRequest = new Request("put", "/20220327001/");
        getRequest.setJsonEntity("{\n" + "   \"settings\":{\n" + "       \"number_of_shards\":5,\n" + "       \"number_of_replicas\":3\n" + "   },\n" + "   \"mappings\":{\n" + "\n" + "           \"properties\":{\n" + "               \"name\":{\n" + "                   \"type\":\"keyword\"\n" + "               }\n" + "\n" + "       }\n" + "   }\n" + "}");

        RestClient client = EsConfig.initClient();
        Response response = client.performRequest(getRequest);
        client.close();

        System.out.println(EntityUtils.toString(response.getEntity()));

    }

    /**
     * 查询所有的索引信息
     */
    @Test
    public void searchIndices() {
        RestClient client = EsConfig.initClient();

        Request request = new Request("GET", "/_cat/indices?v");

        try {
            Response response = client.performRequest(request);
            System.out.println(EntityUtils.toString(response.getEntity()));
        } catch (IOException exception) {
            LOGGER.info(exception.getMessage());
        } finally {
            try {
                client.close();
            } catch (IOException exception) {
                LOGGER.info(exception.getMessage());
            }
        }
    }

    /**
     * 根据索引id查询索引信息
     */
    @Test
    public void searchIndexById() {
        RestClient client = EsConfig.initClient();
        Request request = new Request("Get", "/20220325001/");
        try {
            Response response = client.performRequest(request);
            System.out.println(EntityUtils.toString(response.getEntity()));
        } catch (IOException exception) {
            LOGGER.info(exception.getMessage());
        } finally {
            try {
                client.close();
            } catch (IOException exception) {
                LOGGER.info(exception.getMessage());
            }
        }

    }

    /**
     * 删除索引
     */
    @Test
    public void deleteIndex() {
        RestClient client = EsConfig.initClient();
        Request request = new Request("delete", "/20220325003");

        Cancellable cancellable = client.performRequestAsync(request, new ResponseListener() {
            @Override
            public void onSuccess(Response response) {
                try {
                    LOGGER.info(EntityUtils.toString(response.getEntity()));
                } catch (IOException e) {
                    LOGGER.info(e.getMessage());
                }
            }

            @Override
            public void onFailure(Exception e) {
                System.out.println(e.getMessage());
            }
        });
    }

    @Test
    public void query() throws IOException {
        RestClient client = EsConfig.initClient();
        Request request = new Request("GET", "20220325001/_doc/20220326001");
//        StringBuilder body = new StringBuilder();
        Response response = client.performRequest(request);
        System.out.println(EntityUtils.toString(response.getEntity()));
    }

    @Test
    public void queryMatch() throws IOException {
        RestClient client = EsConfig.initClient();
        Request request = new Request("POST", "/20220325001/_search?filter_path=hits");
        request.setJsonEntity(" {\n" +
                "    \"query\":{\n" +
                "        \"match_all\":{\n" +
                "            \n" +
                "        }\n" +
                "    }\n" +
                "}");
        Response response = client.performRequest(request);
        System.out.println(EntityUtils.toString(response.getEntity()));
        client.close();
    }
}