elasticsearch-5.6.1版本Java API

ES版本更新迭代速度较快,版本相差不多可能JAVA API就会相差很多,以下是elasticsearch-5.6.1版本对应的JAVA API

首先导入pom文件


        
            junit
            junit
            3.8.1
            test
        
        
            org.elasticsearch
            elasticsearch
            5.6.1
        

        
            org.elasticsearch.client
            transport
            5.6.1
        

        
            org.apache.logging.log4j
            log4j-core
            2.9.0
        
        
            junit
            junit
            4.12
            compile
        
        
            org.junit.jupiter
            junit-jupiter-api
            RELEASE
            compile
        
    

以下是elasticsearch-5.6.1版本Java API

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.IndexRequest;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.action.update.UpdateRequest;
import org.elasticsearch.action.update.UpdateResponse;
import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.junit.Before;
import org.junit.Test;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

//9100 head    9200  es     9300  Java API

public class ESTestAPI {
    private TransportClient client;
    @SuppressWarnings("unchecked")
    @Before
   public void testClient() throws Exception{
    Settings settings = Settings.builder().put("cluster.name", "my-application").build();
        client = new PreBuiltTransportClient(settings);
        client.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("mini03"),9300));
        System.out.println(client.toString());
}
    @Test
    public void createIndex(){
// 1 创建索引
    client.admin().indices().prepareCreate("blog").get();
    // 2 关闭连接
    client.close();
}
    @Test
    public void deleteIndex(){
        // 1 删除索引
        client.admin().indices().prepareDelete("blog").get();
        // 2 关闭连接
        client.close();
    }
    // 新建文档(源数据json串)
    @Test
    public void createIndexByJson() throws UnknownHostException {

        // 1 文档数据准备
        String json = "{" + "\"id\":\"1\"," + "\"title\":\"基于Lucene的搜索服务器\","
                + "\"content\":\"它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口\"" + "}";

        // 2 创建文档  下面这行id和上面的id是不一样的 下面的是_id
        IndexResponse indexResponse = client.prepareIndex("blog", "article", "1").setSource(json).execute().actionGet();

        // 3 打印返回的结果
        System.out.println("index:" + indexResponse.getIndex());
        System.out.println("type:" + indexResponse.getType());
        System.out.println("id:" + indexResponse.getId());
        System.out.println("version:" + indexResponse.getVersion());
        System.out.println("result:" + indexResponse.getResult());

        // 4 关闭连接
        client.close();
    }
    //新建文档(源数据map方式添加json)
    @Test
    public void createIndexByMap() {

        // 1 文档数据准备
        Map json = new HashMap();
        json.put("id", "2");
        json.put("title", "基于Lucene的搜索服务器,覆盖以前的值(update)");
        json.put("content", "它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口");

        // 2 创建文档
        IndexResponse indexResponse = client.prepareIndex("blog", "article", "2").setSource(json).execute().actionGet();

        // 3 打印返回的结果
        System.out.println("index:" + indexResponse.getIndex());
        System.out.println("type:" + indexResponse.getType());
        System.out.println("id:" + indexResponse.getId());
        System.out.println("version:" + indexResponse.getVersion());
        System.out.println("result:" + indexResponse.getResult());

        // 4 关闭连接
        client.close();
    }
    //新建文档(源数据es构建器添加json)
    @Test
    public void createIndex3() throws Exception {

        // 1 通过es自带的帮助类,构建json数据
        XContentBuilder builder = XContentFactory.jsonBuilder().startObject().field("id", 3)
                .field("title", "基于Lucene的搜索服务器_id=3覆盖以前的值").field("content", "它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口。")
                .endObject();

        // 2 创建文档
        IndexResponse indexResponse = client.prepareIndex("blog", "article", "3").setSource(builder).get();

        // 3 打印返回的结果
        System.out.println("index:" + indexResponse.getIndex());
        System.out.println("type:" + indexResponse.getType());
        System.out.println("id:" + indexResponse.getId());
        System.out.println("version:" + indexResponse.getVersion());
        System.out.println("result:" + indexResponse.getResult());

        // 4 关闭连接
        client.close();
    }
    //搜索文档数据(单个索引)
    @Test
    public void getData() throws Exception {

        // 1 查询文档
        GetResponse response = client.prepareGet("blog", "article", "2").get();

        // 2 打印搜索的结果
        System.out.println(response.getSourceAsString());

        // 3 关闭连接
        client.close();
    }
    //搜索文档数据(多个索引)
    @Test
    public void getMultiData() {

        // 1 查询多个文档  会打印两次_id=2的值  因为在下面添加了两次
        MultiGetResponse response = client.prepareMultiGet().add("blog", "article", "1").add("blog", "article", "2", "3")
                .add("blog", "article", "2").get();

        // 2 遍历返回的结果
        for(MultiGetItemResponse itemResponse:response){
            GetResponse getResponse = itemResponse.getResponse();
            // 如果获取到查询结果
            if (getResponse.isExists()) {
                String sourceAsString = getResponse.getSourceAsString();
                System.out.println(sourceAsString);
            }
        }

        // 3 关闭资源
        client.close();
    }
    //更新文档数据(update)
    @Test
    public void updateData() throws Throwable {

        // 1 创建更新数据的请求对象
        UpdateRequest updateRequest = new UpdateRequest();
        updateRequest.index("blog");
        updateRequest.type("article");
        updateRequest.id("3");

        updateRequest.doc(XContentFactory.jsonBuilder().startObject()
                // 对没有的字段添加, 对已有的字段替换 !!!
                .field("title", "基于Lucene的搜索服务器")
                .field("content",
                        "它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口。大数据前景无限")
                .field("createDate", "2018-8-22").endObject());

        // 2 获取更新后的值
        UpdateResponse indexResponse = client.update(updateRequest).get();

        // 3 打印返回的结果
        System.out.println("index:" + indexResponse.getIndex());
        System.out.println("type:" + indexResponse.getType());
        System.out.println("id:" + indexResponse.getId());
        System.out.println("version:" + indexResponse.getVersion());
        System.out.println("create:" + indexResponse.getResult());

        // 4 关闭连接
        client.close();
    }
    //更新文档数据(upsert) 设置查询条件, 查找不到则添加IndexRequest内容,查找到则按照UpdateRequest更新。
    @Test
    public void testUpsert() throws Exception {

        // 设置查询条件, 查找不到则添加
        IndexRequest indexRequest = new IndexRequest("blog", "article", "8")
                .source(XContentFactory.jsonBuilder()
                        .startObject()
                        .field("title", "搜索6666")
                        .field("content","它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口。Elasticsearch是用Java开发的,并作为Apache许可条款下的开放源码发布,是当前流行的企业级搜索引擎。设计用于云计算中,能够达到实时搜索,稳定,可靠,快速,安装使用方便。")
                        .endObject());

        // 设置更新, 查找到更新下面的设置
        UpdateRequest upsert = new UpdateRequest("blog", "article", "8")
                .doc(XContentFactory.jsonBuilder()
                        .startObject().field("user", "张三")
                        .endObject())
                        .upsert(indexRequest);

        client.update(upsert).get();
        client.close();
    }
    //删除文档数据(prepareDelete)
    @Test
    public void deleteData() {

        // 1 删除文档数据
        DeleteResponse indexResponse = client.prepareDelete("blog", "article", "5").get();

        // 2 打印返回的结果
        System.out.println("index:" + indexResponse.getIndex());
        System.out.println("type:" + indexResponse.getType());
        System.out.println("id:" + indexResponse.getId());
        System.out.println("version:" + indexResponse.getVersion());
        System.out.println("found:" + indexResponse.getResult());

        // 3 关闭连接
        client.close();
    }
   // 查询所有(matchAllQuery)
    @Test
   public void matchAllQuery() {

       // 1 执行查询
       SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
               .setQuery(QueryBuilders.matchAllQuery()).get();

       // 2 打印查询结果
       SearchHits hits = searchResponse.getHits(); // 获取命中次数,查询结果有多少对象
       System.out.println("查询结果有:" + hits.getTotalHits() + "条");

       Iterator iterator = hits.iterator();

       while (iterator.hasNext()) {
           SearchHit searchHit = iterator.next(); // 每个查询对象

           System.out.println(searchHit.getSourceAsString()); // 获取字符串格式打印
       }

       // 3 关闭连接
       client.close();
   }
    //对所有字段分词查询(queryStringQuery)
    @Test
    public void query() {
        // 1 条件查询
        SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
                .setQuery(QueryBuilders.queryStringQuery("全文")).get();

        // 2 打印查询结果
        SearchHits hits = searchResponse.getHits(); // 获取命中次数,查询结果有多少对象
        System.out.println("查询结果有:" + hits.getTotalHits() + "条");

        Iterator iterator = hits.iterator();
        while (iterator.hasNext()) {
            SearchHit searchHit = iterator.next(); // 每个查询对象

            System.out.println(searchHit.getSourceAsString()); // 获取字符串格式打印
        }

        // 3 关闭连接
        client.close();
    }
    //通配符查询(wildcardQuery)
    @Test
    public void wildcardQuery() {

        // 1 通配符查询
        SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
                .setQuery(QueryBuilders.wildcardQuery("content", "*全*")).get();

        // 2 打印查询结果
        SearchHits hits = searchResponse.getHits(); // 获取命中次数,查询结果有多少对象
        System.out.println("查询结果有:" + hits.getTotalHits() + "条");

        Iterator iterator = hits.iterator();

        while (iterator.hasNext()) {
            SearchHit searchHit = iterator.next(); // 每个查询对象

            System.out.println(searchHit.getSourceAsString()); // 获取字符串格式打印
        }

        // 3 关闭连接
        client.close();
    }
    //词条查询(TermQuery)
    @Test
    public void termQuery() {

        // 1 第一field查询
        SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
                .setQuery(QueryBuilders.termQuery("content", "全")).get();

        // 2 打印查询结果
        SearchHits hits = searchResponse.getHits(); // 获取命中次数,查询结果有多少对象
        System.out.println("查询结果有:" + hits.getTotalHits() + "条");

        Iterator iterator = hits.iterator();

        while (iterator.hasNext()) {
            SearchHit searchHit = iterator.next(); // 每个查询对象

            System.out.println(searchHit.getSourceAsString()); // 获取字符串格式打印
        }

        // 3 关闭连接
        client.close();
    }
    //模糊查询(fuzzy)
    @Test
    public void fuzzy() {

        // 1 模糊查询
        SearchResponse searchResponse = client.prepareSearch("blog").setTypes("article")
                .setQuery(QueryBuilders.fuzzyQuery("title", "lucene")).get();

        // 2 打印查询结果
        SearchHits hits = searchResponse.getHits(); // 获取命中次数,查询结果有多少对象
        System.out.println("查询结果有:" + hits.getTotalHits() + "条");

        Iterator iterator = hits.iterator();

        while (iterator.hasNext()) {
            SearchHit searchHit = iterator.next(); // 每个查询对象

            System.out.println(searchHit.getSourceAsString()); // 获取字符串格式打印
        }

        // 3 关闭连接
        client.close();
    }

}

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