hibernate中Criteria实现复合条件查询

分页查询+多条件查询

分页查询+多条件查询，使用Criteria查询，逻辑清楚而且方便，避免了过多的if else 语句。以下代码中因为查询结果要进行分页，多以将每页数据和查询总数封装到map中传到前台，以供前台bootstrap-table插件使用

public Map dataByPageItem(int pageNow, int pageSize, String searchText, String flag,String jurisdiction, String severity) {
        // TODO Auto-generated method stub
        Map myMap = new HashMap();
        Integer total;
        // 所有item数据分页
        Session session = this.getSessionSelf();
        Criteria crit = session.createCriteria(Item.class);
        crit.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);//解决查询处理的数据重复的问题
        Conjunction conjunction = Restrictions.conjunction(); //and关系
        Disjunction disjunction = Restrictions.disjunction(); //or关系

        if(!"9".equals(flag) && flag != ""){            
            int flagInt = Integer.parseInt(flag);
            Criterion flagCriterion = Restrictions.eq("flag",flagInt);
            conjunction.add(flagCriterion);
        }
        if(jurisdiction!=""){
            Criterion jurisdictionCrt = Restrictions.like("jurisdiction", jurisdiction);
            conjunction.add(jurisdictionCrt);
        }
        if(severity!=""){
            Criterion severityCrt = Restrictions.like("severity", severity);
            conjunction.add(severityCrt);
        }
        if(searchText != ""){
            Criterion address = Restrictions.like("address", searchText);
            Criterion description = Restrictions.like("description", searchText);
            Criterion dealName = Restrictions.like("dealName", searchText);
            Criterion dataTime = Restrictions.like("dataTime", searchText);
            disjunction.add(address);
            disjunction.add(description);
            disjunction.add(dealName);
            disjunction.add(dataTime);
            conjunction.add(disjunction);
        }

        //排序
        crit.add(conjunction).addOrder(Order.desc("dataTime"));  
        // 增加查询条件 
        Criteria critCount = crit;
        total = critCount.list().size();
        //分页
        crit.setFirstResult((pageNow - 1) * pageSize);
        crit.setMaxResults(pageSize);
        List list = crit.list(); 
        List listTotal = new ArrayList();
        listTotal.add(total);
        myMap.put("total", listTotal);//总数
        myMap.put("rows", list);//每页数据
        return myMap;
    }