ElasticSearch(二) SpringBoot集成es

ElasticSearch(二) SpringBoot集成es

1、集成SpringBoot

1.1、配置基本的项目

1、创建一个SpringBoot项目

环境搭建：project structure里面project环境配置成8（相对应的），module中source配置成8，setting里面javac编译配置成8，以及js配置6+；

自定义es版本依赖，保证和本地版本一致：

<elasticsearch.version>7.6.1</elasticsearch.version>

2、创建ElasticSearchClientConfig.java进行配置，注入对象

@Configuration
public class ElasticSearchClientConfig {
    
    
    
    @Bean
    public RestHighLevelClient restHighLevelClient(){
    
    
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(
                        new HttpHost("127.0.0.1", 9200, "http")
                )
        );
        return client;
    }
    
}

具体的Api测试

打开ElasticSearch和head。注入客户端：

@Autowired
private RestHighLevelClient restHighLevelClient;

1、创建索引

//测试索引的创建 Request
    @Test
    void testCreateIndex() throws IOException {
    
    
        // 1.创建索引请求
        CreateIndexRequest request = new CreateIndexRequest("heze_index");
        // 2.客户端执行请求,IndicesClient,请求后获得响应
        CreateIndexResponse createIndexResponse = restHighLevelClient.indices().create(request, RequestOptions.DEFAULT);
        System.out.println(createIndexResponse);
    }

2、判断索引是否存在

// 3.测试获取索引
@Test
void testExistIndex() throws IOException {
    
    
    GetIndexRequest request = new GetIndexRequest("heze_index");
    boolean exists = restHighLevelClient.indices().exists(request, RequestOptions.DEFAULT);
    System.out.println(exists);
}

3、删除索引

// 4.测试删除索引
    @Test
    void testDelIndex() throws IOException {
    
    
        DeleteIndexRequest request = new DeleteIndexRequest("heze_index");
        AcknowledgedResponse delete = restHighLevelClient.indices().delete(request, RequestOptions.DEFAULT);
        System.out.println(delete);
    }

4、创建文档

// 5.测试添加文档
    @Test
    void testAddDocument() throws IOException {
    
    
        // 创建对象
        User user = new User("玉环", 3);
        // 创建请求
        IndexRequest request = new IndexRequest("heze_index");
        
        // 规则 put /heze_index/_doc/1
        request.id("1");
        request.timeout(TimeValue.timeValueSeconds(1));
        // request.timeout("1s");
        
        // 将我们的数据放入请求 json
        request.source(JSON.toJSONString(user), XContentType.JSON);
        
        // 客户端发送请求, 获取响应的结果
        IndexResponse indexResponse = restHighLevelClient.index(request, RequestOptions.DEFAULT);

        System.out.println(indexResponse.toString());
        System.out.println(indexResponse.status());
    }

5、crud文档

// 5.测试添加文档
    @Test
    void testAddDocument() throws IOException {
    
    
        // 创建对象
        User user = new User("玉环", 3);
        // 创建请求
        IndexRequest request = new IndexRequest("heze_index");
        
        // 规则 put /heze_index/_doc/1
        request.id("1");
        request.timeout(TimeValue.timeValueSeconds(1));
        // request.timeout("1s");
        
        // 将我们的数据放入请求 json
        request.source(JSON.toJSONString(user), XContentType.JSON);
        
        // 客户端发送请求, 获取响应的结果
        IndexResponse indexResponse = restHighLevelClient.index(request, RequestOptions.DEFAULT);

        System.out.println(indexResponse.toString());
        System.out.println(indexResponse.status());
    }
    
    // 6.获取文档，判断是否存在, get /index/doc/1
    @Test
    void testIsExist() throws IOException {
    
    
        GetRequest getRequest = new GetRequest("heze_index", "1");
        // 不获取返回的_source 的上下文效率更高
        getRequest.fetchSourceContext(new FetchSourceContext(false));
        boolean exists = restHighLevelClient.exists(getRequest, RequestOptions.DEFAULT);
        System.out.println(exists);
    }
    
    // 7.获取文档信息
    @Test
    void testGetRequest() throws IOException {
    
    
        GetRequest getRequest = new GetRequest("heze_index", "1");
        GetResponse getResponse = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);
        System.out.println(getResponse.getSourceAsString()); //打印文档内容
        System.out.println(getResponse);    //返回全部内容和命令式一样的
    }

    // 8.更新文档信息
    @Test
    void testUpdateRequest() throws IOException {
    
    
        UpdateRequest updateRequest = new UpdateRequest("heze_index", "3");
        updateRequest.timeout("1s");
        User user = new User("zhangsan", 18);
        updateRequest.doc(JSON.toJSONString(user), XContentType.JSON);
        UpdateResponse update = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
        System.out.println(update.status());
    }
    
    // 9.删除文档记录
    @Test
    void testDeleteRequest() throws IOException {
    
    
        DeleteRequest deleteRequest = new DeleteRequest("heze_index", "1");
        deleteRequest.timeout("1s");
        DeleteResponse delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
        System.out.println(delete.status());
    }

	// 11.查询
    // SearchRequest 搜索请求
    // SearchSourceBuilder 条件构造
    // HighlightBuilder 构建高亮
    // TermQueryBuilder 精确查询
    // MatchAllQueryBuilder 匹配全部
    @Test
    void testSearch() throws IOException {
    
    
        SearchRequest searchRequest = new SearchRequest("heze_index");
        // 构建搜索条件
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        
        // 查询条件，我们可以使用 QueryBuilders 工具来实现
        // QueryBuilders.termQuery() 匹配精确
        // QueryBuilders.matchAllQuery() 匹配所有

        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "zhangsan");

        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        
        searchRequest.source(sourceBuilder);

        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
        System.out.println(JSON.toJSONString(searchResponse.getHits()));
        System.out.println("=========");
        for (SearchHit documentFields : searchResponse.getHits().getHits()) {
    
    
            System.out.println(documentFields.getSourceAsMap());
        }
        System.out.println("=========");
    }

6、批量操作

// 10.特殊的，真实的项目一般都会批量插入数据
    @Test
    void testBulkRequest() throws IOException {
    
    
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("10s");

        ArrayList<User> users = new ArrayList<>();
        users.add(new User("玉环", 3));
        users.add(new User("何泽", 18));
        users.add(new User("张三", 10));
        users.add(new User("李四", 11));

        // 批处理请求
        for (int i = 0; i < users.size(); i++) {
    
    
            // 批量更新和批量删除，就在这里修改对应的请求就可以了
            bulkRequest.add(
                    new IndexRequest("heze_index")
                            .id("" + (i + 1))
                            .source(JSON.toJSONString(users.get(i)), XContentType.JSON)
            );
        }

        BulkResponse bulkResponse = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        System.out.println(bulkResponse.hasFailures()); // 返回false为添加成功
    }

总结：这里是在idea中使用api进行es等一些基本的操作，与Kibana相似。简单记录基本的使用方法。下一篇实操实验。