Springboot整合ES

1.创建Springboot工程

(1)创建一个Springboot工程并加入相关的依赖

        
            com.alibaba
            fastjson
            1.2.75
        
        
            org.springframework.boot
            spring-boot-starter-data-elasticsearch
        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
            org.projectlombok
            lombok
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
    

(2) 创建一个配置，获取ES工具类对象

@Configuration
public class ESConfig {

    //该对象可以对我们的ES进行相关的操作
    @Bean
    public RestHighLevelClient restHighLevelClient(){
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("127.0.0.1",9200,"http")));
        return client;
    }
}

 

2.对ES进行相关操作

2.1操作索引--创建索引

 //创建索引
    @Test
    void contextLoads() throws Exception{
        //该类把创建索引的信息封装到该类中
        CreateIndexRequest createIndexRequest = new CreateIndexRequest("qy151-index");
        CreateIndexResponse createIndexResponse = client.indices().create(createIndexRequest, RequestOptions.DEFAULT);
        System.out.println(createIndexResponse.isAcknowledged());
    }

 

2.2操作索引--删除索引

@Test
    public void testDeleteIndex() throws Exception {
        DeleteIndexRequest deleteIndexRequest=new DeleteIndexRequest("qy151-index");
        AcknowledgedResponse delete = client.indices().delete(deleteIndexRequest, RequestOptions.DEFAULT);
        System.out.println(delete.isAcknowledged());
    }

 

2.3索引操作--判断索引是否存在

@Test
    public void testIndexExists() throws Exception{
        GetIndexRequest getIndexRequest=new GetIndexRequest("qy151-index");
        boolean exists = client.indices().exists(getIndexRequest, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

 

2.4操作文档---添加文档

创建一个实体类User

 添加文档

//添加文档--PUT /索引/1 {name:"",age:"",address:""}
    @Test
    public void testInsertDoc() throws Exception{
        IndexRequest indexRequest=new IndexRequest("qy151-index");
        indexRequest.id("1");//指定文档的id
        //指定文档的内容:String文档的json内容，XContentType xContentType：以什么格式
        indexRequest.source(JSON.toJSONString(new User("张三","北京",22)), XContentType.JSON);

        IndexResponse indexResponse = client.index(indexRequest, RequestOptions.DEFAULT);
        System.out.println(indexResponse.getResult());
    }

 

2.5查询文档--id

//获取文档 GET /索引/_doc/1
    @Test
    public void testGetDoc() throws Exception{
        GetRequest indexRequest=new GetRequest("qy151-index");
        indexRequest.id("1");
        GetResponse getResponse = client.get(indexRequest, RequestOptions.DEFAULT);
        String string = getResponse.getSourceAsString();
        User user = JSON.parseObject(string, User.class);

        Map map = getResponse.getSourceAsMap();
        System.out.println(map.get("address"));
    }

 

2.6判断文档是否存在

 //判断索引文档是否存在
    @Test
    public void testDocExist() throws Exception{
        GetRequest indexRequest=new GetRequest("qy151-index");
        indexRequest.id("2");
        boolean exists = client.exists(indexRequest, RequestOptions.DEFAULT);
        System.out.println(exists);
    }

 

2.7 删除文档

//文档操作---删除文档
    @Test
    public void testDeleteDoc() throws Exception{
        DeleteRequest deleteRequest=new DeleteRequest("qy151-index");
        deleteRequest.id("1");
        DeleteResponse delete = client.delete(deleteRequest,RequestOptions.DEFAULT);

        System.out.println(delete.getResult());
    }

 

2.8修改文档

//修改文档
    //POST /qy151-index/1
    //{ "doc":{
    //      "name":"刘德华"
    //  }
    // }
    @Test
    public void testUpdate() throws Exception{
        UpdateRequest updateRequest = new UpdateRequest("qy151-index","1");
        User user = new User();
        user.setName("刘德华");
        updateRequest.doc(JSON.toJSONString(user),XContentType.JSON);
        UpdateResponse update = client.update(updateRequest, RequestOptions.DEFAULT);
        System.out.println(update.getResult());
    }

2.9批量添加文档

    //批量添加文档
    @Test
    public void testBuck() throws Exception{
        BulkRequest bulkRequest = new BulkRequest("qy151-index");
        List list = new ArrayList<>();
        list.add(new User("4","喜羊羊","羊村",15));
        list.add(new User("5","美羊羊","羊村",15));
        list.add(new User("6","懒羊羊","羊村",15));
        list.add(new User("7","沸羊羊","羊村",16));
        list.add(new User("8","暖羊羊","羊村",16));

        list.stream().forEach(item->bulkRequest.add(new IndexRequest().id(item.getId()).source(JSON.toJSONString(item),XContentType.JSON)));

       /* for(User user:list){
            IndexRequest indexRequest=new IndexRequest();
            indexRequest.id(user.getId());
            indexRequest.source(JSON.toJSONString(user),XContentType.JSON);
            bulkRequest.add(indexRequest);
        }*/

        BulkResponse bulk = client.bulk(bulkRequest, RequestOptions.DEFAULT);
        System.out.println(bulk.hasFailures());
    }

 

3.复杂查询

//复杂查询
    //搜索查询---GET /索引/_search
    // {
    //     "query":{
    //         "":{}
//          },
    //  "from":
    //    "size":
    //     "_source":["",""],
    //     "sort":{}

    // }

    //1. 搜索请求对象SearchRequest
    //2. 构建一个条件对象SearchSourceBuilder
    //3. 把条件对象放入搜索请求对象中
    //4. 执行搜索功能
    @Test
    public void testSearch() throws Exception{
        SearchRequest searchRequest = new SearchRequest();

        //创建一个条件对象
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
        //条件对象的条件
        MatchQueryBuilder matchQueryBuilder = new MatchQueryBuilder("name","羊");
        searchSourceBuilder.query(matchQueryBuilder);


        //分页查询  从第零条开始  每页显示2条
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(2);

        //排序
        /*searchSourceBuilder.sort("age");*/


        //高亮
        HighlightBuilder highlightBuilder=new HighlightBuilder();
        highlightBuilder.field("name");
        highlightBuilder.preTags("");
        highlightBuilder.postTags("");
        searchSourceBuilder.highlighter(highlightBuilder);

        searchRequest.source(searchSourceBuilder);


        SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

        System.out.println("总条数:"+searchResponse.getHits().getTotalHits().value);

        SearchHit[] hits = searchResponse.getHits().getHits();
        /*Arrays.stream(hits).forEach(item-> System.out.println(item.getSourceAsString()));*/
        for (SearchHit array:hits
             ) {
            System.out.println(array.getSourceAsString());
        }

        Arrays.stream(hits).forEach(item-> System.out.println(item.getHighlightFields()));
        /*for (SearchHit aaa:hits
             ) {
            System.out.println(aaa.getHighlightFields());
        }*/

    }