ElasticSearch Java IPA

初学ElasticSearch，记录下代码

package com.lucas;


import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.transport.client.PreBuiltTransportClient;

import java.io.IOException;
import java.net.InetAddress;

public class ElasticSearchJavaApi {
    public static void main(String[] args) throws IOException {
        Settings settings = Settings.builder().put("cluster.name", "my-application").build();

        TransportClient client = new PreBuiltTransportClient(settings)
                .addTransportAddress(new TransportAddress(InetAddress.getByName("127.0.0.1"), 9300));

        // 查
        GetResponse response = client.prepareGet("aaa", "vvv", "5").execute().actionGet();
        System.out.println(response.getSourceAsString());

        // 增
        String json = "{" +
                "\"id\":\"1\"," +
                "\"title\":\"Java设计模式之装饰模式\"," +
                "\"content\":\"在不必改变原类文件和使用继承的情况下，动态地扩展一个对象的功能。\"," +
                "\"postdate\":\"2018-02-03 14:38:00\"," +
                "\"url\":\"csdn.net/79239072\"" +
                "}";
        IndexResponse response1 = client.prepareIndex("first_api", "java_api", "1")
                .setSource(json, XContentType.JSON).get();
        System.out.println(response1.status());

        // 改
        XContentBuilder jsonBuilder = XContentFactory.jsonBuilder();
        UpdateRequest updateRequest = new UpdateRequest();

        updateRequest.index("first_api").type("java_api").id("1")
                .doc(jsonBuilder.startObject().
                        field("url").value("https://www.elastic.co/guide/en/elasticsearch/client/java-api/current/transport-client.html")
                        .endObject());
        client.update(updateRequest).actionGet();

        // 删
        DeleteResponse deleteResponse = client
                .prepareDelete("first_api", "java_api", "1")
                .execute().actionGet();
        System.out.println(deleteResponse.status());

        client.close();
    }
}

原文链接：https://blog.csdn.net/gavin5033/article/details/82775868

package com.lucas;

import org.elasticsearch.action.bulk.BulkRequestBuilder;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.get.GetResponse;
import org.elasticsearch.action.get.MultiGetItemResponse;
import org.elasticsearch.action.get.MultiGetResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateRequestBuilder;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.transport.client.PreBuiltTransportClient;

import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class ElasticSeearchUtil {

    private static Settings settings = Settings.builder().put("cluster.name", "my-application").build();

    private static TransportClient transportClient;

    static {
        try {
            transportClient = new PreBuiltTransportClient(settings)
                    .addTransportAddress(new TransportAddress(InetAddress.getByName("127.0.0.1"), 9300));
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }

    /**
     * 新增 document
     *
     * @param indexName index
     * @param indexType type
     * @param data      json data
     * @return RestStatus
     */
    public static RestStatus addDocument(String indexName, String indexType, Map<String, Object> data) {
        IndexResponse actionGet = transportClient
                .prepareIndex(indexName, indexType)
                .setSource(data)
                //.setId("1") //自己设置了id，也可以使用ES自带的，但是看文档说，ES的会因为删除id发生变动。
                .execute().actionGet();
        return actionGet.status();
    }

    /**
     * 修改 document
     *
     * @param indexName index
     * @param indexType type
     * @param id        id
     * @param data      修改的字段map集合
     */
    public static void update(String indexName, String indexType, String id, Map<String, Object> data) {
        UpdateRequest updateRequest = new UpdateRequest();
        updateRequest.index(indexName)
                .type(indexType)
                .id(id)
                .doc(data);

        transportClient.update(updateRequest).actionGet();

        //或者使用下面方式（效果一样）
        /*XContentBuilder jsonBuilder =XContentFactory.jsonBuilder();

        UpdateRequest updateRequest = new UpdateRequest();
        updateRequest.index(indexName)
        .type(indexType)
        .id(id)
        .doc(jsonBuilder
                .startObject()
                    .field("title").value("XContentBuilder")
                .endObject());

        transportClient.update(updateRequest).actionGet();*/
    }

    /**
     * 修改 document
     *
     * @param indexName index
     * @param indexType type
     * @param id        id
     * @param data      修改的字段map集合
     */
    public static void update1(String indexName, String indexType, String id, Map<String, Object> data) {

  /*      UpdateRequestBuilder prepareUpdate = transportClient.prepareUpdate(indexName, indexType, id);
        prepareUpdate
                .setDoc(data)
                //.setId("")
                //.setScript("")
                .get();*/

        //或者
        try {
            XContentBuilder jsonBuilder = XContentFactory.jsonBuilder();
            UpdateRequestBuilder prepareUpdate1 = transportClient.prepareUpdate(indexName, indexType, id);
            prepareUpdate1.setDoc(jsonBuilder.startObject()
                    .field("title").value("XContentBuilder")
                    .endObject())
                    .get();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void delDocument(String indexName, String indexType, String id) {
        DeleteResponse deleteResponse = transportClient
                .prepareDelete(indexName, indexType, id)
                .execute().actionGet();
        deleteResponse.status();
    }

    /**
     * 批量操作
     *
     * @param indexName index
     * @param indexType type
     * @param data      json data
     * @return boolean
     */
    public static boolean bulk(String indexName, String indexType, List<Map<String, Object>> data) {
        BulkRequestBuilder bulkRequestBuilder = transportClient.prepareBulk();

        bulkRequestBuilder.add(transportClient.prepareIndex(indexName, indexType).setSource(data.get(0)));
        bulkRequestBuilder.add(transportClient.prepareDelete(indexName, indexType, "id"));
        bulkRequestBuilder.add(transportClient.prepareUpdate(indexName, indexType, "id").setDoc(data.get(1)));
        BulkResponse bulkResponse = bulkRequestBuilder.execute().actionGet();

        return bulkResponse.hasFailures();
    }

    /**
     * get 操作
     *
     * @param indexName index
     * @param indexType type
     * @param id        id
     * @return map
     */
    public static Map<String, Object> get(String indexName, String indexType, String id) {
        GetResponse getResponse = transportClient
                .prepareGet(indexName, indexType, id)
                .execute().actionGet();

        return getResponse.getSource();
    }

    /**
     * MultiGet
     *
     * @param indexName index
     * @param indexType type
     * @param ids       id
     * @return list
     */
    public static List<Map<String, Object>> multiGet(String indexName, String indexType, String... ids) {
        List<Map<String, Object>> list = new ArrayList<>();
        MultiGetResponse response = transportClient.prepareMultiGet()
                .add(indexName, indexType, ids)
                //另一个index、indextype和ids
                .add("liu1", "liu1_type", "AV8-YHAr6f3B-qEudDab")
                .execute().actionGet();
        for (MultiGetItemResponse itemResponse : response) {
            GetResponse getResponse = itemResponse.getResponse();
            if (getResponse.isExists()) {
                list.add(getResponse.getSource());
                System.out.println(getResponse.getSourceAsString());
            }
        }

        return list;
    }
}