ELASTICSEARCH JAVA的增删改查
ELASTICSEARCH JAVA的增删改查
arthur666 发表于3个月前
ELASTICSEARCH JAVA的增删改查
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摘要: 使用TransportClient对象操作,

操作ES的对象 :TransportClient

<!--elasticsear使用的jar -->
     <dependency>
         <groupId>org.elasticsearch.client</groupId>
         <artifactId>transport</artifactId>
         <version>${elasticsearch.client.version}</version>
     </dependency>
     <!--elasticsear使用的jar -->

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:

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(List<Family> list) {
    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

  1. 通过指定id删除方法
    @Override
    public void batchUndercarriageFamilies(List<String> publishIds) {
       BulkRequestBuilder builder=transportClient.prepareBulk();
       for(String publishId:publishIds){
          builder.add(transportClient.prepareDelete(FAMILY, FAMILY_MARKETFAMILY, publishId).request());
       }
       builder.get();
    }
  2. 通过deleteByQuery删除
  3. @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(List<Related4MyZuValue> list) {
   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();
}

我是使用java操作es的,大家可以在扣扣群互相交流

要下班了,暂时更新到这里

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