java elasticsearch index

es版本6.8.*及以下，7.9.*不适用。

直接贴代码

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ExecutionException;

import org.elasticsearch.action.ActionFuture;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexRequest;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexResponse;
import org.elasticsearch.action.admin.indices.stats.IndexStats;
import org.elasticsearch.action.admin.indices.stats.IndicesStatsRequest;
import org.elasticsearch.action.admin.indices.stats.IndicesStatsResponse;
import org.elasticsearch.client.IndicesAdminClient;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

/**
 * 定义es index格式
 * 
 * @author zhanchaohan
 * @see https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/java-docs-index.html
 */
public class index {
    private TransportClient client;

    @Before
    public void init() throws FileNotFoundException, IOException {
        ElasticConfig ec = new ElasticConfig();
        client = ec.init();
    }

    @After
    public void destroy() {
        if (client != null) {
            client.close();
        }
    }

    @Test
    public void testIndex() throws IOException {
        // json
        String json = "{" + "\"user\":\"kimchy\"," + "\"postDate\":\"2013-01-30\","
                + "\"message\":\"trying out Elasticsearch\"" + "}";
        // 通过Map
        Map<String, Object> mapJson = new HashMap<String, Object>();
        mapJson.put("user", "kimchy");
        mapJson.put("postDate", new Date());
        mapJson.put("message", "trying out Elasticsearch");
        // Jackson实现
//        ObjectMapper mapper = new ObjectMapper(); // create once, reuse
//        byte[] json = mapper.writeValueAsBytes(yourbeaninstance);

        // 官方给出的对象实现
        XContentBuilder builder = jsonBuilder();
        String builderJson = Strings.toString(builder);
        System.out.println(builderJson);
    }

    private XContentBuilder jsonBuilder() throws IOException {
        XContentBuilder builder = XContentFactory.jsonBuilder().startObject().startObject("properties")
                .startObject("user").field("type", "string").field("index", "not_analyzed").endObject()
                .startObject("postDate").field("type", "date").endObject().startObject("message")
                .field("type", "string").field("index", "not_analyzed").endObject().startObject("address")
                .field("type", "string").endObject().startObject("carPsc").field("type", "string").field("index", "ik")
                .endObject().endObject().endObject();
        return builder;
    }

    /***
     * 获取全部节点
     */
    @Test
    public void discoveryNode() {
        List<DiscoveryNode> dnList = client.listedNodes();
        for (DiscoveryNode discoveryNode : dnList) {
            System.out.println(discoveryNode.getHostName());
        }
    }

    /***
     * 获取索引
     */
    @Test
    public void getIndex() {
        ActionFuture<IndicesStatsResponse> isr = client.admin().indices().stats(new IndicesStatsRequest().all());
        IndicesAdminClient indicesAdminClient = client.admin().indices();
        Map<String, IndexStats> indexStatsMap = isr.actionGet().getIndices();
        Set<String> set = isr.actionGet().getIndices().keySet();

        for (String key : set) {
            System.out.println("索引名称:" + key);
        }
    }

    /***
     * 删除全部索引
     * @throws ExecutionException 
     * @throws InterruptedException 
     */
    @Test
    public void deleteAllIndex() throws InterruptedException, ExecutionException {
        ActionFuture<IndicesStatsResponse> isr = client.admin().indices().stats(new IndicesStatsRequest().all());
        Set<String> set = isr.actionGet().getIndices().keySet();

        for (String key : set) {
            DeleteIndexResponse deleteIndexResponse= client.admin().indices().prepareDelete(key).execute().get();
        
            System.out.println(key+":\t"+deleteIndexResponse.isAcknowledged());
        }

    }

    /***
     * 删除指定索引
     */
    @Test
    public void deleteIndex() {
        ActionFuture<DeleteIndexResponse> dResponse = client.admin().indices()
                .delete(new DeleteIndexRequest("ui_template"));
        DeleteIndexResponse deleteIndexResponse = dResponse.actionGet();

        System.out.println(deleteIndexResponse.isAcknowledged());
    }
}