MongoDB Java 查询

朴灿烈づ我的快乐病毒、 2022-02-21 08:52 244阅读 0赞

分页查询等
    
     @RequestMapping("getWsMonitorInfo")
        public String getWsMonitorInfo(MonitorInfo monitorInfo, HttpServletRequest request, HttpServletResponse response, Model model) {
            String type = request.getParameter("type");
            Criteria criteria = new Criteria();
            if(StringUtils.isBlank(monitorInfo.getReqSyscode())){
                monitorInfo.setReqSyscode(null);
            }
            if(StringUtils.isBlank(monitorInfo.getServiceName())){
                monitorInfo.setServiceName(null);
            }
            Page<MonitorInfo> monitorInfoPage = null;
            Query query = new Query();
    
            if (type != null) {
    
                switch (type) {
                    case "startPoint":
    //                    criteria=    Criteria.where("reqSyscode").is(null).and("serviceName").is(null);
                        monitorInfo.setReqSyscode(null);
                        monitorInfo.setServiceName(null);
                        break;
                    case "callSystem":
                        criteria=   Criteria.where("reqSyscode").is(monitorInfo.getReqSyscode()).and("serviceName").is(monitorInfo.getServiceName());
                        break;
                    case "totalCall":
                        criteria=  Criteria.where("reqSyscode").is(monitorInfo.getReqSyscode()).and("serviceName").is(monitorInfo.getServiceName());
                        break;
                    case "successCall":
                        criteria=    Criteria.where("reqSyscode").is(monitorInfo.getReqSyscode()).and("serviceName").is(monitorInfo.getServiceName()).and("ifSuccess").is("1");
                        monitorInfo.setIfSuccess("1");
                        break;
                    case "failCall":
                        criteria=    Criteria.where("reqSyscode").is(monitorInfo.getReqSyscode()).and("serviceName").is(monitorInfo.getServiceName()).and("ifSuccess").is("0");
                        monitorInfo.setIfSuccess("0");
                        break;
                    case "proxyService":
                        criteria=    Criteria.where("serviceName").is(monitorInfo.getServiceName());
                        monitorInfo.setReqSyscode(null);
                        break;
                }
                monitorInfoPage = new Page<>(0, 10);
            } else {
                criteria= null;
                if(StringUtils.isNotBlank(monitorInfo.getReqSyscode())){
                    query.addCriteria( Criteria.where("reqSyscode").is(monitorInfo.getReqSyscode()));
                }
                if(StringUtils.isNotBlank(monitorInfo.getServiceName())){
                    query.addCriteria( Criteria.where("serviceName").is(monitorInfo.getServiceName()));
                }
                if(StringUtils.isNotBlank(monitorInfo.getIfSuccess())){
                    query.addCriteria( Criteria.where("ifSuccess").is(monitorInfo.getIfSuccess()));            }
                }
                monitorInfoPage = new Page<>(request, response);
    
            Sort sort = new Sort(Sort.Direction.DESC,"createDate");
            if(criteria!=null){
                query.addCriteria(criteria);
            }
            Long total = mongoOperations.count(query,MonitorInfo.class);
            query.skip(((monitorInfoPage.getPageNo()-1)>0?monitorInfoPage.getPageNo()-1:0)*monitorInfoPage.getPageSize()).limit(monitorInfoPage.getPageSize()).with(sort);
            List<MonitorInfo> monitorInfos = mongoOperations.find( query,MonitorInfo.class);
            monitorInfoPage.setCount(total);
            monitorInfoPage.setList(monitorInfos);
    //        Page<MonitorInfo> page = monitorInfoService.findPage(monitorInfoPage, monitorInfo);
            model.addAttribute("page", monitorInfoPage);
            return "bi/monitor/monitorInfoList";
    
        }

注意点： mongon中 字段存在和字段为null不等价。空串和null也不等价。

字段不存在 Criteria.where("ifSuccess").not();且不能与其他条件用and或者or拼接

字段为空 Criteria.where("ifSuccess").is(null);

字段为空串 Criteria.where("ifSuccess").is("");

建索引

db.monitorInfo.createIndex(  
    \{  
        reqSystemCode: 1,  
        serviceName: 1,  
        createDate: 1  
    \},  
    \{  
        name: "reqSystemCode\_1\_serviceName\_1\_createDate\_1"  
    \}  
)

更新db.monitorInfo.update(\{\},   
    \{$set:\{\}\},   
    \{ multi: false, upsert: false\}  
)

multi:是否全部更新，upsert是否插入更新（找不到一样的就插入）；

查询不存在某个字段的数据

db.getCollection(‘test’).find(\{res\_name:\{$exists:false\}\})