hibernate 动态列表查询

http://www.blogjava.net/qchong/archive/2008/12/08/245031.html

 

本文章系Jarvis原创,转载请注明!

利用HIBERNAGTE要实现如下功能:

也就是在下方选择要显式的项目,则在上方列表显式.
具体实现:
Struts2实现:

< table  width ="100%"  cellspacing ="1"  class ="l_table" >
                 < tr  class ="l_title" >
                     < s:iterator  value ="showItems" >
                         < td >
                             < s:property  value ="value"   />
                         </ td >
                     </ s:iterator >
                 </ tr >
                 < s:iterator  value ="pager.result"  status ="st"  id ="list" >
                     < tr  class ="l_tr" >
                         < s:iterator  value ="list"  status ="st1" >
                             < td >
                                 < s:if  test ="#st1.count==1" >
                                     < input  type ="checkbox"  vlaue ="<s:property value=" #list[0]"  /> " />
                                 </ s:if >
                                 < s:elseif  test ="#st1.count==2" >
                                     < a  href ="#"
                                        onclick ="openWindow('customer.action?cusId=<s:property value=" #list[0]"  /> ',800,600,'cusW < s:property  value ="#list[0]"   /> ')"> < s:property  />
                                     </ a >
                                 </ s:elseif >
                                 < s:else >
                                     < s:property  />
                                 </ s:else >
                             </ td >
                         </ s:iterator >
                     </ tr >
                 </ s:iterator >
             </ table >

< table  width ="100%"  algin ="center"  id ="selectT" >
                 < tr >
                     < td  align ="center" >
                         < b > 显示项目 </ b >
                     </ td >
                 </ tr >
                 < tr >
                     < td >
                         < s:iterator  value ="selectItems" >
                             < s:property  value ="value"   />
                             < input  type ="checkbox"  value ="<s:property value=" key"  /> " />
                         </ s:iterator >
                     </ td >
                 </ tr >
                 < tr >
                     < td  align ="center" >
                         < input  type ="button"  id ="btn_refresh"  value ="更 新"   />
                     </ td >
                 </ tr >
             </ table >

     public  String execute()  throws  Exception  {
        page = page == null ? 1 : page;
        pageSize = pageSize == null ? 10 : pageSize;
        pager = new Page<Object[]>();
        pager.setPageNo(page);
        pager.setPageSize(pageSize);
        pager.setStyleType(2);
        pager.setTarget("list_customers.asp?pageSize=" + pageSize);
        /* 定制列表项 */
        boolean isExistCookie = false;
        Cookie[] cookies = getRequest().getCookies();
        for (Cookie cookie : cookies) {
            if (cookie.getName().equals("showItemsStr")) {
                // Cookie存在
                isExistCookie = true;
                if (showItemsStr != null && !showItemsStr.trim().equals("")) {
                    // 刷新Cookie
                    cookie.setValue(showItemsStr);
                    cookie.setMaxAge(60 * 60 * 24 * 30);
                    getResponse().addCookie(cookie);
                } else {
                    // 从Cookie中读取
                    showItemsStr = cookie.getValue();
                }
                break;
            }
        }
        // Cookie不存在
        if (!isExistCookie) {
            if (showItemsStr != null && !showItemsStr.trim().equals("")) {
                // 创建Cookie
                Cookie c = new Cookie("showItemsStr", showItemsStr);
                c.setPath("/");
                c.setMaxAge(60 * 60 * 24 * 30);
                getResponse().addCookie(c);
            }
        }
        if (showItemsStr == null || showItemsStr.trim().equals("")) {
            // 为空 ,默认
            showItemsStr = "cusNation|cusCity|cusTelNum|cusEmail";
        }
        showItemsStr = "id|cusName|" + showItemsStr;// id cusName 必须
        showItems = getMapFromStr(showItemsStr);
        pager = customerManager.getCustomers(pager, showItemsStr);

        selectItems = getCusStringMap();
        selectItems.remove("id");
        selectItems.remove("cusName");
        searchItems = getCusStringMap();
        searchItems.remove("id");
        return SUCCESS;
    }
private  Map < String, String >  getMapFromStr(String str)  {
        str = str.trim();
        if (str == null || str.equals(""))
            return null;
        Map<String, String> map = new LinkedHashMap<String, String>();
        String[] strs = str.split("\\|");
        for (String s : strs) {
            map.put(s, getCusStringMap().get(s));
        }
        return map;
    }

     private  Map < String, String >  getCusStringMap()  {
        Map<String, String> map = new LinkedHashMap<String, String>();
        map.put("id", "序号");
        map.put("cusName", "客户名称");
        map.put("cusEmail", "电子邮件");
        /*省略具体项目*/
        return map;
    }

public  Page < Object[] >  getLinkmans(Page < Object[] >  page, String showItemsStr)  {
        String hql = "select " + showItemsStr.trim().replaceAll("\\|", ",")
                + " from Linkman";
        page.setAutoCount(false);
        int totalCount = linkmanDao.sum("select count(*) from Linkman")
                .intValue();
        page.setTotalCount(totalCount);
        page.setResult(linkmanDao
                .find(hql, page.getFirst(), page.getPageSize()));
        return page;
    }