mongotemplate mongodb的各种操作 模糊查询 精确查询

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<PageUrl> 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<Condition> 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);  
    } 

最下面，我在代码亲自实践过的模糊查询，只支持字段属性是字符串的查询，你要是查字段属性是int的模糊查询，还真没辙。

 

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<ProcessLandLog> getProcessLandLogs(int begin,int end,List<Condition> 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<DpsLand> 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<GoodsDetail> 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<Asset> findAllBykeyA(String keyA);  

5. 查询数量:

public long getPageInfosCount(List<Condition> 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<String> fields = new ArrayList<String>();  
        List<Object> values = new ArrayList<Object>();  
        fields.add("state");  
        fields.add("result");  
        fields.add("time");  
        values.add("1");  
        values.add(crawlResult);  
        values.add(Calendar.getInstance().getTime());  
        processLandLogReposity.updateProcessLandLog(processLandLog, fields,  
                values);  
    }  
//更新  
public void updateProcessLandLog(ProcessLandLog land, List<String> fields,List<Object> values) {  
        Update update = new Update();  
        int size = fields.size();  
        for(int i = 0 ; i < size; i++){  
            String field = fields.get(i);  
            Object value = values.get(i);  
            update.set(field, value);  
        }  
        updateFirst(new Query(Criteria.where("id").is(land.getId())), update,ProcessLandLog.class);  
    }

8. 删除数据:

public void deleteObject(Class<T> clazz,String id) {  
        remove(new Query(Criteria.where("id").is(id)),clazz);  
    }  

9.保存数据:

//插入一条数据  
public void saveObject(Object obj) {  
        insert(obj);  
    }  
  
//插入多条数据      
public void saveObjects(List<T> objects) {  
        for(T t:objects){  
            insert(t);  
        }  
    } 

我自己使用的例子：

public Map<String, Object> getAppPortDetailByPage(int pageNo, int pageSize, String order, String sortBy, String appPortType, String appPortSeacherName) {  
    Criteria criteria = new Criteria();  
    if (!appPortType.equals("")) {  
        if (!appPortType.equals("all")) {  
            //DB表里的字段----appmanageType  
            //下同 port protocol 也是DB表的字段  
            criteria.and("appmanageType").is(appPortType);  
        }  
    }  
    if (!appPortSeacherName.equals("")) {  
        try {  
            criteria.orOperator(Criteria.where("port").is(Integer.parseInt(appPortSeacherName)),  
                    Criteria.where("protocol").regex(".*?" + appPortSeacherName + ".*"));  
        }catch (Exception e){  
            criteria.orOperator(Criteria.where("protocol").regex(".*?" + appPortSeacherName + ".*"));  
        }  
    }  
    Map<String, Object> result = Maps.newHashMap();  
    Query query = new Query(criteria);  
    query.skip((pageNo - 1) * pageSize);  
    query.limit(pageSize);  
    if(order != null && sortBy != null){  
        query.with(new Sort(new Sort.Order(order.equals("asc") ? Sort.Direction.ASC : Sort.Direction.DESC, sortBy)));  
    }else {  
        query.with(new Sort(new Sort.Order(Sort.Direction.ASC, "port")));  
    }  
    List<Appportmanage> list = this.mongoTemplate.find(query, Appportmanage.class);  
    long count = this.mongoTemplate.count(query, Appportmanage.class);  
    result.put("datas", list);  
    result.put("size", count);  
    return result;  
}