mongotemplate mongodb的各种操作 模糊查询 精确查询

mongotemplate mongodb的各种操作 模糊查询 精确查询 等等

一. 常用查询:

1. 查询一条数据:(多用于保存时判断db中是否已有当前数据,这里 is 精确匹配,模糊匹配 使用 regex…)

      public PageUrl getByUrl(String url) {  
        return findOne(new Query(Criteria.where("url").is(url)),PageUrl.class);  
    }  
   

2. 查询多条数据:linkUrl.id 属于分级查询

     public List getPageUrlsByUrl(int begin, int end,String linkUrlid) {          
        Query query = new Query();  
        query.addCriteria(Criteria.where("linkUrl.id").is(linkUrlid));  
        return find(query.limit(end - begin).skip(begin), PageUrl.class);          
    }  
   

3. 模糊查询:

      public long getProcessLandLogsCount(List conditions)  
   		 {  
        Query query = new Query();  
        if (conditions != null && conditions.size() > 0) {  
            for (Condition condition : conditions) {  
                query.addCriteria(Criteria.where(condition.getKey()).regex(".*?\\" +condition.getValue().toString()+ ".*"));  
            }  
        }  
        return count(query, ProcessLandLog.class);  
    }  
   

4. gte: 大于等于,lte小于等于…注意查询的时候各个字段的类型要和mongodb中数据类型一致

   public List getProcessLandLogs(int begin,int end,List conditions,String 			orderField,Direction direction)  
        {  
            Query query = new Query();  
            if (conditions != null && conditions.size() > 0) {  
                for (Condition condition : conditions) {  
                    if(condition.getKey().equals("time")){  
                        query.addCriteria(Criteria.where("time").gte(condition.getValue())); //gte: 大于等于  
                    }else if(condition.getKey().equals("insertTime")){  
                        query.addCriteria(Criteria.where("insertTime").gte(condition.getValue()));  
                    }else{  
                        query.addCriteria(Criteria.where(condition.getKey()).is(condition.getValue()));  
                    }  
                }  
            }  
            return find(query.limit(end - begin).skip(begin).with(new Sort(new Sort.Order(direction, orderField))), ProcessLandLog.class);  
        }  
      
    public List getDpsLandsByTime(int begin, int end, Date beginDate,Date endDate) {  
      return find(new Query(Criteria.where("updateTime").gte(beginDate).lte(endDate)).limit(end - begin).skip(begin),  
        DpsLand.class);  
     }  
   

查询字段不存在的数据

    public List getGoodsDetails2(int begin, int end) {  
            Query query = new Query();  
            query.addCriteria(Criteria.where("goodsSummary").not());  
            return find(query.limit(end - begin).skip(begin),GoodsDetail.class);  
        }  

查询字段不为空的数据

Criteria.where("key1").ne("").ne(null)  

查询或语句：a || b

Criteria criteria = new Criteria();  
criteria.orOperator(Criteria.where("key1").is("0"),Criteria.where("key1").is(null));  

查询且语句：a && b

Criteria criteria = new Criteria();  
criteria.and("key1").is(false);  
criteria.and("key2").is(type);  
Query query = new Query(criteria);  
long totalCount = this.mongoTemplate.count(query, Xxx.class);  

查询一个属性的子属性，例如：查下面数据的key2.keyA的语句

   var s = {  
       key1: value1,  
       key2: {  
           keyA: valueA,  
           keyB: valueB  
       }  
   };  



@Query("{'key2.keyA':?0}")  
List findAllBykeyA(String keyA);  

5. 查询数量:

     public long getPageInfosCount(List conditions) {  
                Query query = new Query();  
                if (conditions != null && conditions.size() > 0) {  
                    for (Condition condition : conditions) {  
                        query.addCriteria(Criteria.where(condition.getKey()).is(condition.getValue()));  
                    }  
                }  
                return count(query, PageInfo.class);  
            }  
   

6. 更新一条数据的一个字段:

   public WriteResult updateTime(PageUrl pageUrl) {  
                String id = pageUrl.getId();  
                return updateFirst(new Query(Criteria.where("id").is(id)),Update.update("updateTime", 				pageUrl.getUpdateTime()), PageUrl.class);  
        }  
   

7. 更新一条数据的多个字段:

//调用更新

private void updateProcessLandLog(ProcessLandLog processLandLog,  
            int crawlResult) {  
        List fields = new ArrayList();  
        List