elasticsearch jestclient api

1、es search sroll 可以遍历索引下所有数据

public class TestDemo {
    
    @Test
    public void searchSroll() {
        JestClientFactory factory = new JestClientFactory();
        factory.setHttpClientConfig(new HttpClientConfig.Builder("http://192.168.1.100:9200").multiThreaded(true).readTimeout(300000).build());
        JestClient client = factory.getObject();
        String query = "{" +
                "    "query":{" +
                "        "match_all":{}" +
                "    }" +
                "}";
        try {
            Search search = new Search.Builder(query).addIndex("my_index").addType("my_type").setParameter(Parameters.SIZE, 5000).setParameter(Parameters.SCROLL, "1m").build();
            JestResult result = client.execute(search);
            String scrollId = result.getJsonObject().get("_scroll_id").getAsString();
            System.out.println(scrollId);
            for (int i = 1; i < 10; i++) {
                SearchScroll scroll = new SearchScroll.Builder(scrollId, "1m").build();
                result = client.execute(scroll);
                List<Map> list = result.getSourceAsObjectList(Map.class);
                if (list != null) {
                    System.out.println(list.get(0));
                    System.out.println(list.size());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

2、es search sroll 可以遍历索引下所有数据。与上面差别是利用SearchSourceBuilder构造查询条件。

public class TestDemo {

    //搜索测试
    @Test
    public void JestSearchTest() throws Exception {
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        searchSourceBuilder.query(QueryBuilders.matchQuery("content", "搜索"));
        Search search = new Search.Builder(searchSourceBuilder.toString())
                // multiple index or types can be added.
                .addIndex("indexdata")
                .build();
        JestClient client = getClient();
        SearchResult result = client.execute(search);
//          List> hits = result.getHits(Klarticle.class);
        Listarticles = result.getSourceAsObjectList(Klarticle.class);
        for (Klarticle k : articles) {
            System.out.println("------->：" + k.getTitle());
        }
    }
}