dbobject精品文章

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  scrapy入門：豆瓣電影top250爬取

  ... DoubanPipeline(object): def process_item(self, item, spider): dbObject = dbHandle() cursor = dbObject.cursor() sql = insert into db_info(ranking,title,director,movie_de...

  xialong 2019-07-31 11:16 評論0 收藏0
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  spring data mongo比較兩個字段查詢

  ...teria criteria = new Criteria() { @Override public DBObject getCriteriaObject() { DBObject obj = new BasicDBObject(); obj.put($where, this.la...

  wall2flower 2019-06-26 17:04 評論0 收藏0
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  雙刃劍MongoDB的學(xué)習(xí)和避坑

  ... import org.springframework.stereotype.Repository; import com.mongodb.BasicDBObject; import com.mongodb.DBCollection; import com.mongodb.DBObject; @Repository @SuppressWarnings({unchecked, rawtype...

  everfight 2019-06-26 17:35 評論0 收藏0
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  MongoDB導(dǎo)出場景查詢優(yōu)化

  ...r = collection.find(query).batchSize(8000); while (dbCursor.hasNext()) { DBObject nextItem = dbCursor.next(); //業(yè)務(wù)代碼 ... // } 那么我們再看看hasNext內(nèi)部的邏輯好嗎？好的. @Override public boolean has...

  seal_de 2019-06-26 17:18 評論0 收藏0
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  Spring Boot 中使用 MongoDB 增刪改查

  ...據(jù)庫取出的數(shù)據(jù)實例化為對象。該構(gòu)造函數(shù)傳入的值為從DBObject中取出的數(shù)據(jù) package io.ymq.example.mongodb; @Document(collection = demo_collection) public class DemoEntity implements Serializable { @Id private Long id; ...

  ranwu 2019-06-26 17:34 評論0 收藏0