ElasticSearch6.x 基於SpringBoot 實現ElasticSearch之分組統計查詢

AggregationUtil.java中添加如下方法，

 /**
	     * 分組統計
	     * @param index 索引
	     * @param field 文檔屬性
	     * @return
	     */
	    public Terms terms(String index,String field){
	    	String name = "terms";
	        AggregationBuilder agg=AggregationBuilders.terms(name).field(field);
	        SearchResponse response=client.prepareSearch(index).addAggregation(agg).execute().actionGet();
	        return response.getAggregations().get(name);
	    }
	    
	    /**
	     * 過濾器統計
	     * @param index 索引
	     * @param field 文檔屬性
	     * @return
	     */
	    public Filter filter(String index, String field, String key){
	        QueryBuilder query=QueryBuilders.termQuery(field,key);
	        String name ="filter";
	        AggregationBuilder agg=AggregationBuilders.filter(name,query);
	        SearchResponse response=client.prepareSearch(index).addAggregation(agg).execute().actionGet();
	        return response.getAggregations().get(name);
	    }
	    
	    /**
	     * 多過濾器統計
	     * @param index 索引
	     * @param list  過濾條件隊列
	     * @return
	     */
	    public Filters filters(String index, List<TermQueryBuilder> list){
	    	String name = "filters";
	    	
	    	FiltersAggregator.KeyedFilter[] filters = new FiltersAggregator.KeyedFilter[list.size()];
	    	for(int i=0; i <list.size(); i++){
	    		TermQueryBuilder obj = list.get(i);
	    		FiltersAggregator.KeyedFilter item = new FiltersAggregator.KeyedFilter(obj.fieldName(),obj);
	    		filters[i] = item;
	    	}
	    	
	        AggregationBuilder agg=AggregationBuilders.filters(name, filters);
	        SearchResponse response=client.prepareSearch(index).addAggregation(agg).execute().actionGet();
	        return response.getAggregations().get(name);
	    }
	    
	    /**
	     * 區間統計
	     * @param index 索引
	     * @param field 文檔屬性
	     * @return
	     */
	    public Range range(String index, String field, double to, double from){
	    	String name ="range";
	        AggregationBuilder agg=AggregationBuilders
	                .range(name)
	                .field(field)
	                .addUnboundedTo(to)//第1個範圍 ( ,to)
	                .addRange(to,from)//第2個範圍[to,from)
	                .addUnboundedFrom(from);//第3個範圍[from,)
	        SearchResponse response=client.prepareSearch(index).addAggregation(agg).execute().actionGet();
	        return response.getAggregations().get(name);
	    }

	

	    /**
	     * 日期區間統計
	     * @param index 索引
	     * @param field 文檔屬性
	     * @return
	     */
	    public Range dateRange(String index, String field,String to,String from, String formated){
	    	String name ="dateRange";
	        AggregationBuilder agg=AggregationBuilders
	                .dateRange(name)
	                .field(field)
	                .format(formated)
	                .addUnboundedTo(to)
	                .addUnboundedFrom(from);
	        SearchResponse response=client.prepareSearch(index).addAggregation(agg).execute().actionGet();
	        return response.getAggregations().get(name);
	    }
	    
	    /**
	     * Missing統計
	     * @param field
	     * @return
	     */
	    public Missing missing(String index, String field){
	    	String name ="missing";
	        AggregationBuilder agg=AggregationBuilders.missing(name).field(field);
	        SearchResponse response=client.prepareSearch(index).addAggregation(agg).execute().actionGet();
	        return response.getAggregations().get(name);
	    }