RestHighLevelClient方式操作

Rest操作通常是在Kibana编写语句，然后将json格式的参数放入到java代码中。

创建索引映射

@Test
public void testCreateIndex() throws IOException {
    CreateIndexRequest createIndexRequest = new CreateIndexRequest("fruit");
    createIndexRequest.mapping("{\n" +
                               "    \"properties\": {\n" +
                               "      \"title\":{\n" +
                               "        \"type\": \"keyword\"\n" +
                               "      },\n" +
                               "      \"price\":{\n" +
                               "        \"type\": \"double\"\n" +
                               "      },\n" +
                               "      \"created_at\":{\n" +
                               "        \"type\": \"date\"\n" +
                               "      },\n" +
                               "      \"description\":{\n" +
                               "        \"type\": \"text\"\n" +
                               "      }\n" +
                               "    }\n" +
                               "  }\n" , XContentType.JSON);
    // restHighLevelClient.indices()代表操作索引，create代表创建
    // 参数1是指定映射json结构，参数2是指定数据类型
    CreateIndexResponse createIndexResponse = restHighLevelClient.indices().create(createIndexRequest, RequestOptions.DEFAULT);
    System.out.println("创建状态："+createIndexResponse.isAcknowledged());
    restHighLevelClient.close();
}

索引文档

@Test
public void testIndex() throws IOException {
  IndexRequest indexRequest = new IndexRequest("fruit");
  indexRequest.source("{\n" +
                      "          \"id\" : 1,\n" +
                      "          \"title\" : \"蓝月亮\",\n" +
                      "          \"price\" : 123.23,\n" +
                      "          \"description\" : \"这个洗衣液非常不错哦！\"\n" +
                      "        }",XContentType.JSON);
  IndexResponse index = restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
  System.out.println(index.status());
}

更新文档

@Test
public void testUpdate() throws IOException {
  UpdateRequest updateRequest = new UpdateRequest("fruit","qJ0R9XwBD3J1IW494-Om");
  updateRequest.doc("{\"title\":\"好月亮\"}",XContentType.JSON);
  UpdateResponse update = restHighLevelClient.update(updateRequest, RequestOptions.DEFAULT);
  System.out.println(update.status());
}

删除文档

@Test
public void testDelete() throws IOException {
  DeleteRequest deleteRequest = new DeleteRequest("fruit","1");
  DeleteResponse delete = restHighLevelClient.delete(deleteRequest, RequestOptions.DEFAULT);
  System.out.println(delete.status());
}

基于 id 查询文档

@Test
public void testGet() throws IOException {
  GetRequest getRequest = new GetRequest("fruit","1");
  GetResponse getResponse = restHighLevelClient.get(getRequest, RequestOptions.DEFAULT);
  System.out.println(getResponse.getSourceAsString());
}

查询所有

 @Test
public void testSearch() throws IOException {
  SearchRequest searchRequest = new SearchRequest("fruit");
  SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
  sourceBuilder.query(QueryBuilders.matchAllQuery());
  searchRequest.source(sourceBuilder);
  SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
  //System.out.println(searchResponse.getHits().getTotalHits().value);
  SearchHit[] hits = searchResponse.getHits().getHits();
  for (SearchHit hit : hits) {
    System.out.println(hit.getSourceAsString());
  }
}

综合查询

 @Test
public void testSearch() throws IOException {
  SearchRequest searchRequest = new SearchRequest("fruit");
  SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
  sourceBuilder
    .from(0)
    .size(2)
    .sort("price", SortOrder.DESC)
    .fetchSource(new String[]{"title"},new String[]{})
    .highlighter(new HighlightBuilder().field("description").requireFieldMatch(false).preTags("<span style='color:red;'>").postTags("</span>"))
    .query(QueryBuilders.termQuery("description","错"));
  searchRequest.source(sourceBuilder);
  SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);
  System.out.println("总条数: "+searchResponse.getHits().getTotalHits().value);
  SearchHit[] hits = searchResponse.getHits().getHits();
  for (SearchHit hit : hits) {
    System.out.println(hit.getSourceAsString());
    Map<String, HighlightField> highlightFields = hit.getHighlightFields();
    highlightFields.forEach((k,v)-> System.out.println("key: "+k + " value: "+v.fragments()[0]));
  }
}