struts+hibernate+jsp Page Implementation Paging

Last Update:2016-11-17 Source: Internet

Author: User

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DAO Layer Database code:

 PackageCom.hanqi.dao;Importjava.util.ArrayList;Importjava.util.List;Importorg.hibernate.Session;Importorg.hibernate.SessionFactory;Importorg.hibernate.Transaction;ImportOrg.hibernate.boot.registry.StandardServiceRegistryBuilder;Importorg.hibernate.cfg.Configuration;ImportOrg.hibernate.service.ServiceRegistry;ImportCom.hanqi.utility.USer; Public classUserdao {PrivateConfiguration cfg =NULL ; Privateserviceregistry sr =NULL ; PrivateSessionfactory SF =NULL ; PrivateSession SE =NULL ; Transaction TS=NULL ;  PublicUserdao () {//Initialize HibernateCFG =NewConfiguration (). Configure (); SR=NewStandardserviceregistrybuilder (). Applysettings (Cfg.getproperties ()). build (); }                 Public voidinit () {SF=Cfg.buildsessionfactory (SR); Se=sf.opensession (); TS=se.begintransaction (); }                         Public voiddestory () {ts.commit ();                        Se.close ();         Sf.close (); }                                //Query List         PublicList<user> GetAll (intpage) {List<USer> list =NewArraylist<>() ;                         Init (); //set two lines per page and start PageList = Se.createquery ("from USer"). Setmaxresults (2). Setfirstresult (Page-1) * *). List ();                        Destory (); returnlist; }}

Next is the JSP page, where you pass the page number through the Get method of the A tag

<%@ Pagelanguage= "Java"ContentType= "text/html; charset=utf-8"pageencoding= "UTF-8"%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8"><title>Insert Title here</title></Head><Body><ahref= "AddUSer">Add user</a><BR><BR><ahref= "Selectuser?pages=1" >User List</a></Body></HTML>

Jump to the display screen

1 <% @pageImport= "Com.hanqi.utility.USer"%>2 <% @pageImport= "Java.util.List"%>3 <%@ Pagelanguage= "Java"ContentType= "text/html; charset=utf-8"4 pageencoding= "UTF-8"%>5 <!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd ">6 <HTML>7 <Head>8 <Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8">9 <title>Insert Title here</title>Ten </Head> One <Body> A <% -  - List<user>List = (List<USer>) Request.getattribute ("Selectuser"); the  - For (USer us:list) - { -Out.print (US + "<ahref= ' deleteuser?user_id= ' +us.getuser_id () + "'>Delete</a>" ++"<ahref= ' modify?userid= ' +us.getuser_id () + "'>Modify</a>" -+"<BR>") ; + } A int pages = Integer.parseint (Request.getparameter ("pages")); at  - %> -  - <% if(List.size ()==0) {response.getwriter (). Write ("Page out of range"); - response.setheader ("Refresh", "3;url=selectuser?pages=1 ");} else{%> - <%%> in <ahref= "Selectuser?pages=<%=pages-1%>">Previous page</a> - <ahref= "Selectuser?pages=<%=pages+1%>">Next page</a> to <%} %> + </Body> - </HTML>

Struts file Configuration

1 <!--Search All -2         <Actionname= "Selectuser"class= "Com.hanqi.action.USerAction"Method= "Selectuser">3         4                 <resultname= "Fail">/web-inf/pages/fail.jsp</result>5         6                 <resultname= "Success">/web-inf/pages/selectuser.jsp</result>7         8         </Action>

Service Layer Method

Public String Selectuser ()    {        String RTN = "fail";                Try        {//Get native request            httpservletrequest HSR = Servletactioncontext.getrequest ();                        int page = Integer.parseint (Hsr.getparameter ("pages"));                        page = Integer.parseint (Hsr.getparameter ("pagess"));            Method of invoking a query            list<USer>  list = new UserService (). GETALL (page);                        Hsr.setattribute ("pages", page+1);                        Hsr.setattribute ("Selectuser", list);                    RTN = "Success";        } catch (Exception e)        {            e.printstacktrace ();        }                return RTN;    }

When the page number is exceeded, the error is prompted (judging by the list of JSPs) hibernate provides a method that returns List.size () as the number of rows (the last page may be less than the number of rows), or zero without data to determine

struts+hibernate+jsp Page Implementation Paging

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