mongodb criteria查询

http://blog.csdn.net/ni_hao_ya/article/details/26384467

1. //is相当于等于  
2. //in相当于sql中的in  
3. //ne相当于不等于  
4. //orOperator接受多个条件，组成or逻辑  

1. query.addCriteria(Criteria.where("modelId").ne("").ne(null));  
2. query.with(new Sort(new Order(Direction.DESC, "ct")));  

1. Query query=new Query();  
2. Criteria criteria=Criteria.where("name").is("tom")
3.                            .and("studentNum").in(numberList);  
4. query.addCriteria(criteria);  

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1. 或new Query(criteria);  

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1. Criteria criteria=Criteria.where("indexWarnGrade").ne("0")
2.                            .orOperator(Criteria.where("resId")
3.                            .is(channelId),
4. Criteria.where("resBelongChannelId").is(channelId));  
5. query.addCriteria(criteria);  
6. query.with(new Sort(Direction.DESC, "indexWarnLatelyDate"));  

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1. //分页  
2. int currentPage = (initPagingBean.getStart()/initPagingBean.getPageSize())+1;  
3. Query query=new Query();  
4.         //查询通道和通道下属的设备告警信息  
5.         Criteria criteria=Criteria.where("indexWarnGrade").ne("0")
6.               .orOperator(Criteria.where("resId")
7.               .is(channelId)

1.   Criteria.where("resBelongChannelId").is(channelId));  
2.         query.addCriteria(criteria);  
3.         query.with(new Sort(Direction.DESC, "indexWarnLatelyDate"));  
4.         int total = (int) this.realMongodbServiceImpl.
5.               findCount(MonitorObject.class, query);  
6.         initPagingBean.setTotalItems(total);  
7.  //查询mo集合  
8.  List<MonitorObject> moList=this.realMongodbServiceImpl.
9. findList(MonitorObject.class, query, currentPage, initPagingBean.getPageSize());         
10.   
11. initPagingBean.setDataList(wvList);  
12. return  initPagingBean;  

多个字段排序：第一排序按照sort降序，第二排序按照ct降序

1. query.with(new Sort(new Order(Direction.DESC, "sort"))
2.              .and(new Sort(Direction.DESC,"ct")));                                
3. //query.sort().on("xxx", Order.DESCENDING);    
4. //query.sort().on("xxx", Order.ASCENDING);    
5.