Have enthusiastic Netizen reply:
str = "Go to <select name= ' page ' onchange=\" window.location.href= ' "+ fileName + temp +" cur_page= "+this.options[this.se Lectedindex].value\ ">";
I've tried, no problem.
1. The following is the implementation of the paging class Pageresultset
Copy Code code as follows:
Package Page.bean;
Import java.util.*;
public class Pageresultset {
/**
* Paging Data
*/
Private Collection data = null;
/**
* Current Page
*/
private int curpage;
/**
* Number of records displayed per page
*/
private int pageSize;
/**
* Record number of rows
*/
private int rowscount;
/**
* Page number
*/
private int PageCount;
Public Pageresultset (Collection data) {
This.data = data;
This.curpage = 1;
This.pagesize = 10;
This.rowscount = Data.size ();
This.pagecount = (int) Math.ceil (double) rowscount/pagesize);
}
Public Pageresultset (Collection data, int curpage) {
This.data = data;
This.curpage = Curpage;
This.pagesize = 10;
This.rowscount = Data.size ();
This.pagecount = (int) Math.ceil (double) rowscount/pagesize);
}
Public Pageresultset (Collection data, int curpage, int pageSize) {
This.data = data;
This.curpage = Curpage;
This.pagesize = pageSize;
This.rowscount = Data.size ();
This.pagecount = (int) Math.ceil (double) rowscount/pagesize);
}
/**
* Getcurpage: Returns the current number of pages
*
* @return int
*/
public int getcurpage () {
return curpage;
}
/**
* GetPageSize: Back to paging size
*
* @return int
*/
public int getpagesize () {
return pageSize;
}
/**
* Getrowscount: Returns the total number of record rows
*
* @return int
*/
public int Getrowscount () {
return rowscount;
}
/**
* Getpagecount: Return total pages
*
* @return int
*/
public int Getpagecount () {
return PageCount;
}
/**
* First Page
*
* @return int
*/
public int-A () {
return 1;
}
/**
* Last Page
*
* @return int
*/
public int-Last () {
return PageCount;
}
/**
* Previous Page
*
* @return int
*/
public int Previous () {
Return (CurPage-1 < 1)? 1:curpage-1;
}
/**
* Next Page
*
* @return int
*/
public int Next () {
Return (Curpage + 1 > PageCount)? Pagecount:curpage + 1;
}
/**
* First Page
*
* @return Boolean
*/
public Boolean Isfirst () {
return (Curpage = 1)? True:false;
}
/**
* Last Page
*
* @return Boolean
*/
public Boolean islast () {
return (Curpage = = PageCount)? True:false;
}
/** * Get current page data
*
* @return Collection
*/
Public Collection GetData () {
Collection curdata = null;
if (data!= null) {
int start = (curPage-1) * pageSize;
int end = 0;
if (start + pageSize > Rowscount)
end = Rowscount;
Else
End = start + pageSize;
ArrayList arraycurdata = new ArrayList ();
ArrayList arraydata = null;
Vector vectorcurdata = new vector ();
Vector vectordata = null;
Boolean IsArray = true;
if (data instanceof ArrayList) {
Arraydata = (ArrayList) data;
IsArray = true;
else if (data instanceof Vector) {
Vectordata = (Vector) data;
IsArray = false;
}
for (int i = start; i < end; i++) {
if (IsArray) {
Arraycurdata.add (Arraydata.get (i));
} else {
Vectordata.add (Vectordata.elementat (i));
}
}
if (IsArray) {
Curdata = (Collection) arraycurdata;
} else {
Curdata = (Collection) vectorcurdata;
}
}
return curdata;
}
/**
* Get tool bar
*
* @return String
*/
public string Gettoolbar (string fileName) {
String temp = "";
if (Filename.indexof ("?") = = 1) {
temp = "?";
} else {
temp = "&";
}
String str = "<form method= ' post ' name= ' frmpage ' action= '" + fileName + ' > ';
STR + + "<p align= ' center ' >";
if (Isfirst ())
STR + + "First prev";
else {
STR + + "<a href= '" + fileName + temp + "cur_page=1 ' > Home </a>";
STR + + "<a href= '" + fileName + temp + "cur_page=" + (curPage-1) + "' > Prev </a>";
}
if (Islast ())
STR + + "next Last";
else {
STR + + "<a href= '" + fileName + temp + "cur_page=" + (Curpage + 1) + "' > Next </a>";
STR + + "<a href= '" + fileName + temp + "cur_page=" + PageCount + "' > Last </a>";
}
STR + + "Total <b>" + Rowscount + "</b> record";
str = "Go to <select name= ' page ' onchange= ' location= '" + fileName
+ temp + "cur_page= ' +this.options[this.selectedindex].value" > ";
for (int i = 1; I <= PageCount; i++) {
if (i = = curpage)
STR + + "<option value= '" + i + "' selected> First" + i + "page </option>";
Else
STR + + "<option value= '" + i + "' > first" + i + "page </option>";
}
STR + + "</select></p></form>";
return str;
}
}
2. It's action.
Copy Code code as follows:
/*
* Generated by MyEclipse Struts
* Template PATH:TEMPLATES/JAVA/JAVACLASS.VTL
*/
Package struts.action;
Import java.util.Collection;
Import Javax.servlet.http.HttpServletRequest;
Import Javax.servlet.http.HttpServletResponse;
Import org.apache.struts.action.Action;
Import Org.apache.struts.action.ActionForm;
Import Org.apache.struts.action.ActionForward;
Import org.apache.struts.action.ActionMapping;
Import Page.bean.DatabaseConn;
Import Page.bean.PageResultSet;
Import Page.bean.ContactBO;
Import Struts.form.LoginForm;
/**
* MyEclipse Struts
* Creation date:04-02-2008
*
* XDoclet Definition:
* @struts. Action path= "/login" name= "LoginForm" input= "/login.jsp" scope= "Request" validate= "true"
* @struts. Action-forward name= "sss" path= "/index.jsp"
*/
public class Loginaction extends Action {
/*
* Generated Methods
*/
/**
* Method Execute
* @param mapping
* @param form
* @param request
* @param response
* @return Actionforward
*/
Public Actionforward Execute (actionmapping mapping, Actionform form,
HttpServletRequest request, HttpServletResponse response) {
LoginForm loginform = (loginform) Form;
Contactbo userbo=new Contactbo ();
First remove the data from the business Process logic class (ArrayList or vector format)
Collection data;
try {
data = Userbo.findcontact (Databaseconn.getconnection ());
Then get the current page curpage and the number of records per page pagesize
int curpage = Integer.parseint ((String) request.getparameter ("Cur_page"));
int curpage = 1;
String cur = request.getparameter ("Cur_page");
System.out.println ("--------------:" +cur);
if (cur!=null && cur!= "") {
Curpage = new Integer (cur). Intvalue ();
}
int pagesize=10;
Then generate the Pageresultset object
Pageresultset dataList = new Pageresultset (data, curpage, pageSize);
Request.setattribute ("Userslist", dataList);
Return Mapping.findforward ("SSS");
catch (Exception e) {
E.printstacktrace ();
return Mapping.getinputforward ();
}
}
}
3. The following is the page showing the pagination
Copy Code code as follows:
<%@ page language= "java" import= "Java.util.*,page.bean.contact,page.bean.pageresultset"
pageencoding= "gb2312"%>
<%
String path = Request.getcontextpath ();
String basepath = request.getscheme () + "://"
+ request.getservername () + ":" + request.getserverport ()
+ path + "/";
%>
<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
<base href= "<%=basePath%>" >
<title>my JSP ' index.jsp ' starting page</title>
<meta http-equiv= "Pragma" content= "No-cache" >
<meta http-equiv= "Cache-control" content= "No-cache" >
<meta http-equiv= "Expires" content= "0" >
<meta http-equiv= "keywords" content= "keyword1,keyword2,keyword3" >
<meta http-equiv= "description" content= "This are my page" >
<!--
<link rel= "stylesheet" type= "Text/css" href= "Styles.css" >
-->
<body>
<table border= "1" >
<%
Pageresultset Pageresultset = (pageresultset) request.getattribute ("Userslist");
ArrayList userslist = (ArrayList) pageresultset.getdata ();
for (int i = 0; i < userslist.size (); i++) {
Contact CO = (Contact) userslist.get (i);
%>
<tr>
<td>
<%=co.getid ()%>
</td>
<td>
<a href= "Login.do?id=<%=co.getid ()%>" ><%=co.getusername ()%></a>
</td>
<td>
<%=co.getmobile ()%>
</td>
<td>
<%=co.getmail ()%>
</td>
<td>
<%=co.getphone ()%>
</td>
<td>
<%=co.getmem ()%>
</td>
<td>
<%=co.getlastcontact ()%>
</td>
</tr>
<%
}
%>
</table>
<!--display the page---> toolbar
<%=pageresultset.gettoolbar ("login.do")%>
</body>
