ELASTICSEARCH如何实现JAVA的增删改查
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操作ES的对象 :TransportClient
org.elasticsearch.client transport ${elasticsearch.client.version}
我的版本是5.4.0
创建 TransportClient对象
我是使用spring的bean注入的
@SuppressWarnings("resource") @Bean(name="transportClient") @Lazy public TransportClient getTransportClient(){ TransportClient client =null; try{ Settings settings= Settings.builder().put("cluster.name", "elasticsearch").build(); client=new PreBuiltTransportClient(settings).addTransportAddress( new InetSocketTransportAddress(InetAddress.getByName("192.168.0.11"),9300)); log.info("创建es客户端对象成功"); }catch(Exception e){ log.error("创建es客户端对象失败"); log.error("失败原因:"+e.getMessage()); System.exit(-1); } return client; }
创建对象那个成功后,就可以用来操作es库了,他的作用跟spring-jdbctemplate,spring-jdbctemplate一样,提供了对数据库增删改查的功能,
spring也提供了对es操作的对象叫Spring Data Elasticsearch
参考文档:
http://www.ibm.com/developerworks/cn/opensource/os-cn-spring-jpa
我用的就是es自己提供的对象 TransportClient
添加数据
es的添加数据提供了多种方法,跟hql语言有点相似,都是面向对象的。
es支持批量操作的方法,为了提供效率都是用批量的对象
BulkRequestBuilder builder=transportClient.prepareBulk();
BulkRequestBuilder 对象有一个地方需要注意,因为是批量操作,es忽略了数据的不正确性,就算你的数据不对,builder也不会报错,所以在调试阶段需要先确保数据的准确性再用该对象进行操作。
插入数据,其实只需要把你的对象转成json,然后批量插入即可
@Override public void batchAddMyZu(Listlist) { BulkRequestBuilder builder=transportClient.prepareBulk(); for(Family family:list){ String objstr= JSON.toJSONString(family); builder.add(client.prepareIndex("family","myfamily",family.getPrimaryKey()).setSource(objstr, XContentType.JSON)); } builder.execute().actionGet(); System.out.println("此次插入数据的个数是 "+list.size()); }
setSource方法里面可以指定各种插入类型,我一般都是用json格式。
删除操作
es可以通过指定index,type,id删除数据,也支持搜索删除deleteByQuery
通过指定id删除方法
@Override public void batchUndercarriageFamilies(List
publishIds) { BulkRequestBuilder builder=transportClient.prepareBulk(); for(String publishId:publishIds){ builder.add(transportClient.prepareDelete(FAMILY, FAMILY_MARKETFAMILY, publishId).request()); } builder.get(); } 通过deleteByQuery删除
@Override public void delMyZu(String guid, String userId) { DeleteByQueryAction.INSTANCE.newRequestBuilder(transportClient) .source(FAMILY) .filter(QueryBuilders.boolQuery().must(QueryBuilders.termQuery("zuGUID", guid)).must(QueryBuilders.termQuery("userId", userId)).must(QueryBuilders.typeQuery(FAMILY_MYFAMILY))) .get(); }
QueryBuilder对象可以做任何查询
修改操作
我现在修改是根据指定索引后然后修改指定字段酱样的
@Override public void updateMyZu_Related4MyZuValue(Listlist) { BulkRequestBuilder builder=transportClient.prepareBulk(); for(Related4MyZuValue value:list){ try { XContentBuilder source=XContentFactory.jsonBuilder().startObject() .field("related4ZuValue",value.getRelated4ZuValue()) .field("zuSalePrice",value.getZuSalePrice()) .endObject(); builder.add(transportClient.prepareUpdate(FAMILY, FAMILY_MYFAMILY, value.getPrimaryKey()).setDoc(source)); } catch (IOException e) { continue; } } builder.get(); }
我这种操作是执行id后修改该数据的related4ZuValue的值和zuSalePrice的值
查询操作
es最主要功能就是查询
QueryBuilder就是设置查询条件的对象,你可以通过他设置各种条件
随便贴几个,自己感受吧。。。。
BoolQueryBuilder boolQueryBuilder=QueryBuilders.boolQuery(); if(keyword!=null&&!keyword.equals("")){ QueryBuilder nameBuilder=QueryBuilders.matchQuery("zuName", keyword).analyzer("ik_max_word").boost(10); QueryBuilder labelBuilder=QueryBuilders.matchQuery("zuLabelName", keyword).analyzer("ik_max_word").boost(10); QueryBuilder categoryBuilder=QueryBuilders.matchQuery("categoryName", keyword).analyzer("ik_max_word").boost(10); boolQueryBuilder.should(nameBuilder).should(labelBuilder).should(categoryBuilder); }else{ boolQueryBuilder.must(QueryBuilders.matchAllQuery()); } SearchResponse response=transportClient.prepareSearch(FAMILY).setTypes(FAMILY_MARKETFAMILY) .setQuery(boolQueryBuilder) .setFrom((page-1)*pageSize).setSize(pageSize) .setExplain(true) .get(); SearchHits hits=response.getHits();
BoolQueryBuilder builders=new BoolQueryBuilder(); //加上条件 builders.must(QueryBuilders.termQuery("userId", userId)); if(relatedValue==RelatedValue.MyBuyerZu.value()){ builders.must(QueryBuilders.nestedQuery("related4ZuValue", QueryBuilders.boolQuery() .must(QueryBuilders.termQuery("related4ZuValue.nameValue", UserReltatedValueUtil.getUserRelatedValue(relatedValue))) //.must(QueryBuilders.rangeQuery("endTime").lte(LongformStringDate(System.currentTimeMillis()))) ,ScoreMode.None)); }else{ builders.must(QueryBuilders.nestedQuery("related4ZuValue", QueryBuilders.termQuery("related4ZuValue.nameValue", UserReltatedValueUtil.getUserRelatedValue(relatedValue)), ScoreMode.None)); } SearchResponse response=transportClient.prepareSearch(FAMILY).setTypes(FAMILY_MYFAMILY) .setQuery(builders).setFrom((page-1)*pageSize) .setSize(pageSize) .get(); SearchHits hits=response.getHits();
@Override public MarketFamily getMarketFamily(String guid) { MarketFamily marketFamily=new MarketFamily(); SearchResponse response=transportClient.prepareSearch(FAMILY) .setTypes(FAMILY_MYFAMILY).setQuery(QueryBuilders.termQuery("zuGUID", guid)) .setSize(1) .get(); SearchHits hits=response.getHits(); for(SearchHit hit:hits.getHits()){ marketFamily=JSON.parseObject(hit.getSourceAsString(),MarketFamily.class); } return marketFamily; }
取查询结果总和count
@Override public long countMyAllZu(String userId, int relatedValue) { BoolQueryBuilder builders=new BoolQueryBuilder(); builders.must(QueryBuilders.termQuery("userId", userId)); if(relatedValue==RelatedValue.MyBuyerZu.value()){ builders.must(QueryBuilders.nestedQuery("related4ZuValue", QueryBuilders.boolQuery() .must(QueryBuilders.termQuery("related4ZuValue.nameValue", UserReltatedValueUtil.getUserRelatedValue(relatedValue))) .must(QueryBuilders.rangeQuery("endTime").lte(LongformStringDate(System.currentTimeMillis()))) ,ScoreMode.None)); }else{ builders.must(QueryBuilders.nestedQuery("related4ZuValue", QueryBuilders.termQuery("related4ZuValue.nameValue", UserReltatedValueUtil.getUserRelatedValue(relatedValue)), ScoreMode.None)); } SearchResponse response=transportClient.prepareSearch(FAMILY).setTypes(FAMILY_MYFAMILY) .setQuery(builders) .setSize(1) .get(); SearchHits hits=response.getHits(); return hits.getTotalHits(); }
聚合求和sum
@Override public long getPlatformZuOrdersTotalAmount(String keyword,String startTime,String endTime) { BoolQueryBuilder boolQueryBuilder=QueryBuilders.boolQuery(); if(keyword==null||keyword.equals("")){ QueryBuilder queryBuilder=QueryBuilders.matchAllQuery(); boolQueryBuilder.must(queryBuilder); }else{ QueryBuilder zuNameBuilder=QueryBuilders.matchQuery("zuName", keyword); QueryBuilder buyerNameBuilder=QueryBuilders.matchQuery("buyerName", keyword); QueryBuilder sellerNameBuilder=QueryBuilders.matchQuery("sellerName", keyword); boolQueryBuilder.should(zuNameBuilder).should(buyerNameBuilder).should(sellerNameBuilder); } if(!startTime.equals("")){ QueryBuilder addTimeBuilder=QueryBuilders.rangeQuery("addTime").from(startTime).to(endTime); boolQueryBuilder.must(addTimeBuilder); } SearchResponse response=transportClient.prepareSearch(FAMILY).setTypes(FAMILY_FAMILYORDER) .setQuery(boolQueryBuilder) .addAggregation(AggregationBuilders.sum("price").field("price")) .get(); Sum sum=response.getAggregations().get("price"); return (long) sum.getValue(); }
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本文标题:ELASTICSEARCH如何实现JAVA的增删改查
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