ElasticSeacher 基本查詢方法一

分組後排序

  QueryBuilder bool = QueryBuilders.boolQuery().must(QueryBuilders.termQuery("IsPresent",0));
               //true升序   false是降序
        TermsAggregationBuilder teamAgg = AggregationBuilders.terms("pos_count").field("NewsId").order(Terms.Order.count(true)).size(Integer.MAX_VALUE);
        SearchRequestBuilder builder = client.prepareSearch 
(esIndexConfig.getIndex()).setTypes(esIndexConfig.getType());
        SearchResponse response = builder.setQuery(bool).addAggregation(teamAgg).execute().actionGet();
        // SearchResponse response= builder.setQuery(bool).setSize(0).execute().actionGet();
        System.out.println(response.getHits().totalHits 
);
        Terms terms = response.getAggregations().get("pos_count");
        /**得到的是分組數*/
        System.out.println(terms.getBuckets().size());
        Iterator<?> classBucketIt = terms.getBuckets().iterator();
        SearchHits searchHit=response.getHits();
        while(classBucketIt.hasNext 
())

        {
            Terms.Bucket classBucket =(Terms.Bucket) classBucketIt.next();
            System.out.println(  "NewId: " + classBucket.getDocCount() +"調結果。");

        }

多重組合排序並取得排序後的資料集

先經過VendorId欄位排序後經過NewsId排序 top是用來取得結果集，沒有top只能得到

這種結果
17088791年級17088791班有30個學生。
17088816年級17088816班有10個學生。
17086707年級17086707班有9個學生。
17089274年級17089274班有9個學生。
17089275年級17089275班有8個學生。
17089270年級17089270班有4個學生。
17089198年級17089198班有2個學生。
17089199年級17089199班有2個學生。
17089200年級17089200班有2個學生。
17089265年級17089265班有2個學生。
17089267年級17089267班有2個學生。
17088796年級17088796班有1個學生。
17088798年級17088798班有1個學生。
17088799年級17088799班有1個學生。
17089266年級17089266班有1個學生。





 QueryBuilder bool = QueryBuilders.boolQuery().must(QueryBuilders.termQuery("IsPresent", 0));
        TermsAggregationBuilder teamAgg = AggregationBuilders.terms("VendorId").field("VendorId").order(Terms.Order.count(false)).size(Integer.MAX_VALUE);

         TermsAggregationBuilder team = AggregationBuilders.terms("NewsId").field("NewsId").order(Terms.Order.count(false)).size(Integer.MAX_VALUE);
         team.subAggregation(AggregationBuilders.topHits("top").size(Integer.MAX_VALUE));
         teamAgg.subAggregation(team);

        SearchRequestBuilder builder = client.prepareSearch(esIndexConfig.getIndex()).setTypes(esIndexConfig.getType());
        SearchResponse response = builder.setQuery(bool).addAggregation(teamAgg).setSize(100).execute().actionGet();
        // SearchResponse response= builder.setQuery(bool).setSize(0).execute().actionGet();
        System.out.println(response.getHits().totalHits);
        Terms terms = response.getAggregations().get("VendorId");
        /**得到的是分組數*/
        System.out.println("分組 +VendorId"+terms.getBuckets().size());


        Iterator<?> classBucketIt = terms.getBuckets().iterator();
        SearchHits searchHit = response.getHits();


        for(Terms.Bucket entry:terms.getBuckets()){

            Terms terTwo=entry.getAggregations().get("NewsId");
            System.out.println("分組 +NewsId"+terms.getBuckets().size());


            for(Terms.Bucket bucket:terTwo.getBuckets()){

                 System.out.println(entry.getKeyAsString()+"____"+bucket.getKeyAsString()+"有"+bucket.getDocCount());
                 System.out.println(bucket.getAggregations().asList().size());
                 TopHits topHits = bucket.getAggregations().get("top");

                 for(SearchHit hit:topHits.getHits()){

                     System.out.println(hit.getSourceAsString());

                 }
            }



        }



    }

結果如下

{"VendorId":50002218,"NewsId":17086707,"CarId":103302,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":6.00,"FavorablePrice":1.00,"CarReferPrice":16.9800,"SalePrice":15.9800,"NId":17086707,"VendorPrice":15.5000,"StoreState":1,"NewCarID":103302,"CarName":"2.0L 手動 兩驅 時尚型","CarTransmissionType":"手動","CarYearType":2013,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0588928150765606595995288575,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116436,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":5.00,"FavorablePrice":1.00,"CarReferPrice":19.6900,"SalePrice":18.6900,"NId":17086707,"VendorPrice":20.0000,"StoreState":1,"NewCarID":116436,"CarName":"1.6T 雙離合 領先型 兩驅","CarTransmissionType":"雙離合","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0507872016251904520060944642,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116446,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":6.00,"FavorablePrice":1.00,"CarReferPrice":17.9900,"SalePrice":16.9900,"NId":17086707,"VendorPrice":18.0000,"StoreState":1,"NewCarID":116446,"CarName":"1.6T 雙離合 智慧型 兩驅","CarTransmissionType":"雙離合","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0555864369093941078376876042,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116451,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":6.00,"FavorablePrice":1.00,"CarReferPrice":16.4900,"SalePrice":15.4900,"NId":17086707,"VendorPrice":16.0000,"StoreState":1,"NewCarID":116451,"CarName":"2.0L 自動 舒適型 兩驅","CarTransmissionType":"手自一體","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.06064281382656155245603396,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116452,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":6.00,"FavorablePrice":1.00,"CarReferPrice":15.9900,"SalePrice":14.9900,"NId":17086707,"VendorPrice":15.9900,"StoreState":1,"NewCarID":116452,"CarName":"2.0L 手動 舒適型 兩驅","CarTransmissionType":"手動","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0625390869293308317698561601,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116091,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":4.00,"FavorablePrice":1.00,"CarReferPrice":23.9900,"SalePrice":22.9900,"NId":17086707,"VendorPrice":24.0000,"StoreState":1,"NewCarID":116091,"CarName":"1.6T 雙離合 旗艦型 四驅","CarTransmissionType":"雙離合","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0416840350145894122551062943,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116449,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":6.00,"FavorablePrice":1.00,"CarReferPrice":17.4900,"SalePrice":16.4900,"NId":17086707,"VendorPrice":17.4900,"StoreState":1,"NewCarID":116449,"CarName":"2.0L 自動 智慧型 兩驅","CarTransmissionType":"手自一體","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0571755288736420811892510006,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
{"VendorId":50002218,"NewsId":17086707,"CarId":116433,"CarImage":"http://img1.bitautoimg.com/autoalbum/files/20150810/534/21252753412596_4198300_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":5.00,"FavorablePrice":1.00,"CarReferPrice":21.5900,"SalePrice":20.5900,"NId":17086707,"VendorPrice":22.0000,"StoreState":1,"NewCarID":116433,"CarName":"1.6T 雙離合 尊貴型 四驅","CarTransmissionType":"雙離合","CarYearType":2015,"CsId":1574,"CsShowName":"全新途勝","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0463177396943029180176007411,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-02-11T10:26:00+08:00","StartDateTime":"2018-02-11T00:00:00+08:00","EndDateTime":"2018-03-12T00:00:00+08:00","LastModifyTime":"2018-02-11T10:26:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8177881+08:00"}
50002218____17089274有9
1
{"VendorId":50002218,"NewsId":17089274,"CarId":115717,"CarImage":"https://img1.bitautoimg.com/autoalbum/files/20130109/519/17291451996479_2435044_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":0.00,"FavorablePrice":0.00,"CarReferPrice":24.9800,"SalePrice":24.9800,"NId":17089274,"VendorPrice":25.5000,"StoreState":1,"NewCarID":115717,"CarName":"2.0T 四驅 自動 智慧型 5座","CarTransmissionType":"手自一體","CarYearType":2015,"CsId":3821,"CsShowName":"全新勝達","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-08-15T10:22:00+08:00","StartDateTime":"2018-08-15T00:00:00+08:00","EndDateTime":"2018-09-13T00:00:00+08:00","LastModifyTime":"2018-08-15T10:22:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8237884+08:00"}
{"VendorId":50002218,"NewsId":17089274,"CarId":115718,"CarImage":"https://img1.bitautoimg.com/autoalbum/files/20130109/519/17291451996479_2435044_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201,"CityName":"北京","SaleRegionType":9999,"Discount":0.00,"FavorablePrice":0.00,"CarReferPrice":23.9800,"SalePrice":23.9800,"NId":17089274,"VendorPrice":23.7700,"StoreState":1,"NewCarID":115718,"CarName":"2.0T 兩驅 自動 智慧型 5座","CarTransmissionType":"手自一體","CarYearType":2015,"CsId":3821,"CsShowName":"全新勝達","CsLevelId":64,"CpCountry":1,"CbName":"北京現代","CbId":10062,"CMBName":"現代","CMBID":13,"CarColor":"","AreaId":110108,"AreaName":"海淀區","JiangFu":0.0,"MobileDimWeightSort":60001,"PCDimWeightSort":64001,"MediaIds":"1,2,3,4,5,11,16,17,18,20,22","MediaIdsArr":[1,2,3,4,5,11,16,17,18,20,22],"CityNameList":"","ProvinceSpell":"beijing","CitySpell":"beijing","NewsPubTime":"2018-08-15T10:22:00+08:00","StartDateTime":"2018-08-15T00:00:00+08:00","EndDateTime":"2018-09-13T00:00:00+08:00","LastModifyTime":"2018-08-15T10:22:00+08:00","DealerLastmodifyTime":"2017-04-25T18:03:00+08:00","TimeStamp":"2018-08-16T14:39:07.8237884+08:00"}
{"VendorId":50002218,"NewsId":17089274,"CarId":114034,"CarImage":"https://img1.bitautoimg.com/autoalbum/files/20130109/519/17291451996479_2435044_3.jpg","IsPresent":0,"PresentPrice":0.00,"DealerId":50002218,"DealerName":"易車互聯公司","BusinessModelId":2,"VendorTel":"18001353123$010-65432123$010-65432124","PId":2,"PName":"北京","CityId":201, 
 
              
           
              
              
            
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本文希望通過簡單的總結，把常用的查詢方法予以總結，希望能夠明確在心。
場景：學生信息系統 

  
 

    

    
    MySQl 進階一 基本查詢及練習
      ssi   rom   esc   part   轉換成   code   全部   round   別名   知識點及練習

USE myemployees;
#1.查詢表中的單個字段
SELECT last_name FROM employees;

#2.查詢表中多個字段

#3.查詢全 

  
 

    

    
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 該篇文章介紹了資料庫連線池獲取資料庫連線以及資料庫操作的基本使用，然後主要提供了java專案案例中dao層的一種設計，利用反射的原理定義了通用的查詢方法可以對應所有的表和例項。文章中的每段程式碼都提供了詳細的註釋及邏輯步驟 
 首先匯入資料庫連線的所需要的jar包： 
      

  
 

    

    
    SQL總結一：基本查詢
       
 
     sql查詢的事情很簡單，但是常常因為簡單的事情而出錯。遇到一些比較複雜的查詢我們更是忘記了sql查詢的基本語法。本文希望通過簡單的總結，把常用的查詢方法予以總結，希望能夠明確在心。 
 場景：學生資訊系統，包括學生資訊、教師資訊、專業資訊和選課資訊。 
  
 --學生資 

  
 

    

    
    Oracle資料庫，當前時間轉為星期的語句和查詢某一欄位轉為星期顯示的一種方法。
       
 
 
 1、當前時間的星期 
  select to_char(sysdate,'day') from  dual  ; 
   
 2、指定欄位的星期 
  select decode (substr(to_char(t.欄位,'d','NLS_DATE_LANGUAGE 

  
 

    

    
    Oracle筆記之資料的基本查詢(一)
      
                上週在面試的時候 考到SQL語句的查詢時有點懵，回來後就開始複習oracle的相關知識。本來在筆記本上記筆記，可奈何字寫得不是很好看，考慮到以後方便查閱的問題，就來了部落格，一起復習複習。雖然在SQL語言的規範中關鍵字都是大寫，但是為了方便書寫和查閱，這裡全用小寫。

一、簡 

  
 

    

    
    [Xcode10 實際操作]一、博主領進門-(6)Xcode的iOS模擬器的基本使用方法
      本文將演示Xcode的iOS模擬器的基本使用方法。 
在專案導航區，滑鼠右鍵【Assets.xcassets】資原始檔夾。 
隔壁右側區域左下角點選【+】，開啟資原始檔管理選單->【Import】 
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    LaTeX基本使用方法（一）
      
                
	TeX studio快捷鍵
	
執行 F5

註釋 ctrl+T

去註釋 ctrl+U


	LaTeX基本用法
	
Latex屬於標記式排版語言，命令以\開頭。

中文article類（能夠顯示中文）：\documentclass[UTF8]{ctexart}

註釋 

  
 

    

    
    基於深度學的目標檢測方法一之基本思想概念
       
 
 
   
 目前在研究基於深度學的目標檢測方法，現在就目標檢測涉及的一些基本概念總結如下： 
   
 一、基於圖的影象分割（Graph  Based Image Segmentagion） 該方法是基於圖論中的最優樹的思想，利用貪心演算法對影象的區域進行聚類以達到對一 

  
 

    

    
    easyui dialog 一文讀懂dialog基本使用方法
       
 
  
  
 easyui dialog 是easyui中的彈出框元件，使用該元件可以做出彈出框效果，方便使用。 
 1.建立方式：
（1）html方式：
只需要在div中加入class名easyui-dialog.
 
 <div class='easyui-dialog' data-opti 

  
 

    

    
    Unity IOC容器通過配置實現型別對映的一種基本使用方法（個人比較喜歡）
      
							
							
							什麼是Unity？
Unity是一個輕量級的可擴充套件的依賴注入容器，支援建構函式，屬性和方法呼叫注入。Unity可以處理那些從事基於元件的軟體工程的開發人員所面對的問題。構建一個成功應用程式的關鍵是實現非常鬆散的耦合設計。鬆散耦合的應用程式更靈活，更易於維護。 

  
 

    

    
    一個數據庫查詢方法（可以動態設定查詢引數，設定查詢條件），很巧妙的組合sql語句
      
                public <T> QueryResult<T> getScrollData(Class<T> entityClass,String wherejpql,Object[] queryParams,   int firstindex, in 

  
 

    

    
    靜默獲取使用者基本資訊的一種方法
      
							
							
							首先我們需要獲取openid,



1.獲取code





下面是PHP語言，寫在getcode這個頁面裡



$code = $_GET['code'];//獲取code
$weixin =  file_get_contents("https://ap 

  
 

    

    
    TensorFlow數據集（一）——數據集的基本使用方法
      cor   mark   get-data   註意   輸入輸出   create   amp   lose   urn   參考書
《TensorFlow：實戰Google深度學習框架》（第2版）

例子：從一個張量創建一個數據集，遍歷這個數據集，並對每個輸入輸出y = x^2 的值。


#!/usr/ 

  
 

    

    
    MyBatis實現連結查詢的一種方法
      
							
							
							現象： 
在mybatis查詢中有時候需要查詢一張表，然後在通過這個查詢出來的欄位去連結另外一張表進行查詢！

解決辦法： 
這裡通過sql查詢了一個物件，在通過這個物件中的id去查詢了另外一張表與這個id對應的資料集合！實現了物件中有集合的一種查詢！

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JDBC資料庫連線池連線資料庫及資料庫操作DAO層設計通用更新及查詢方法（一）

SQL總結一：基本查詢

Oracle資料庫，當前時間轉為星期的語句和查詢某一欄位轉為星期顯示的一種方法。

Oracle筆記之資料的基本查詢(一)

[Xcode10 實際操作]一、博主領進門-(6)Xcode的iOS模擬器的基本使用方法

LaTeX基本使用方法（一）

基於深度學的目標檢測方法一之基本思想概念

easyui dialog 一文讀懂dialog基本使用方法

Unity IOC容器通過配置實現型別對映的一種基本使用方法（個人比較喜歡）

一個數據庫查詢方法（可以動態設定查詢引數，設定查詢條件），很巧妙的組合sql語句

靜默獲取使用者基本資訊的一種方法

TensorFlow數據集（一）——數據集的基本使用方法

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