JSP implementation page, paging function _

JSP implementation page, paging function __jsp

Last Update:2018-07-20 Source: Internet

Author: User

Tags odbc rowcount stmt

Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Method One

Submit to this page "dividepage.jsp"

<%@ page language= "java" contenttype= "text/html;charset=gb2312"%>
<%@ page import= "java.sql.*,java.lang.string,java.util.*"%>
<title>
Paging display
</title>
<%! String url,sql,xh; %>
<%! Connection conn;%>
<%! ResultSet rs;%>
<%! Statement stmt;%>
<%!int i;%>
<%!int pagesize=3;%>
<%!int rowcount=0;%>
<%!int pagecurrent;%>
<%!int pagecount;%>
<body>
<table width= "80%" border= "1" cellspacing= "1" cellpadding= "1" align= "Center" >
<tr>
&LT;TD width= "16%" align= "Center" > School Number </td>
&LT;TD width= "16%" align= "center" > Name </td>
&LT;TD width= "8%" align= "center" > Gender </td>
&LT;TD width= "8%" align= "center" > Age </td>
&LT;TD width= "12%" align= "center" > Birthplace </td>
&LT;TD width= "12%" align= "center" > Faculty </td>
&LT;TD width= "20%" align= "center" > Change </td>
&LT;TD width= "20%" align= "center" > Delete </td>
</tr>

<%
/**

The main purpose of the following database connection is to find the total number of records rowcount
*/
Try
{
Class.forName ("Sun.jdbc.odbc.JdbcOdbcDriver");
Url= "Jdbc:odbc:university";
Conn=drivermanager.getconnection (URL, "Guojia", "19861213");
Stmt=conn.createstatement ();
Sql= "SELECT * from student";
Rs=stmt.executequery (SQL);
Out.print (ROWCOUNT);
rowcount=0;//notice here the Qing 0 must not be less, otherwise you a little hyperlink, all the records are added again
while (Rs.next ())
{
rowcount++;
}
Rs.close ();
Stmt.close ();
Conn.close ();

}catch (Exception e)
{
Out.print (e);
}
%>
<%
try{
Class.forName ("Sun.jdbc.odbc.JdbcOdbcDriver");
Url= "Jdbc:odbc:university";
Conn=drivermanager.getconnection (URL, "Guojia", "19861213");
Stmt=conn.createstatement ();
Sql= "SELECT * from student";
Rs=stmt.executequery (SQL);
String strpage=request.getparameter ("page");//"page passes arguments for connection"
/**
Page must be null the first time the page is run, because the argument is not passed, the Pagecurrent value is set to 1
It means the first page.
*/
if (strpage==null)
{
Pagecurrent=1;
}
else{
Pagecurrent=integer.parseint (strpage);
if (pagecurrent<1)
Pagecurrent=1;
}
/**
The purpose of the following two sentences is to position the cursor to the last record on the previous page of the page to display
*/
For (i=1;i<= (pageCurrent-1) *pagesize;i++)
Rs.next ();
/**
The purpose of the following for loop is to place the page's record in the table
*/
for (i=1;i<=pagesize;i++)
{
if (Rs.next ())
{
Xh=rs.getstring (1);
%>
<tr>
&LT;TD width= "16%" align= "Center" >
<%=xh%>
</td>
&LT;TD width= "16%" align= "Center" >
<%=rs.getobject (2)%>
</td>
&LT;TD width= "8%" align= "Center" >
<%=rs.getobject (3)%>
</td>
&LT;TD width= "8%" align= "Center" >
<%=rs.getobject (4)%>
</td>
&LT;TD width= "12%" align= "Center" >
<%=rs.getobject (5)%>
</td>
&LT;TD width= "12%" align= "Center" >
<%=rs.getobject (6)%>
</td>
&LT;TD width= "18%" align= "Center" >
<a href= "change.jsp?xuehao=<%=xh%>" > Modification </a>
</td>
&LT;TD width= "18%" align= "Center" >
<a href= "del.jsp?xuehao=<%=xh%>" > Delete </a>
</td>
</tr>
<%
}

}
Out.print (Conn.getautocommit ())//This statement tests Conn Autocommit no, if not, add Conn.commit () after executeupdate ();
Rs.close ();
Stmt.close ();
Conn.close ();
pagecount= (int) (rowcount/pagesize);
if (Pagesize*pagecount<rowcount)
{
pagecount++;
}
Out.print ("A total of" +pagecount+ "page");
if (pagecount>1)
{
for (i=1;i<=pagecount;i++)
Out.print ("<a href= ' dividepage.jsp?page=" +i+ "' >" +i+ "</a>"); It's easy to make mistakes.
/**
Out.print ("<a href= ' dividepage.jsp?page= '" +i+ "' >" +i+ "</a>"); Here's the error on the page equals No "'"
The double quotes inside the double quotes become single quotes.
*/
}
Out.print ("At present is the first" +pagecurrent+ "page");
}
catch (Exception e)
{
Out.print (e);
}
%>
</table>
<div align= "center" >
<a href= "insert.jsp" > Add new Record </a></div>
</body>

Method Two

<%@ page language= "java" contenttype= "text/html;charset=gb2312"%>
<%@ page import= "java.sql.*,java.lang.string.*,java.util.*"%>
<title>
JSP to achieve page paging function
</title>
<%!
Connection Conn;
ResultSet rs;
Statement stmt;
String Sql,url,strpage,no;
int pagesize=3;//The number of records displayed on one page
int rowcount;//Total Records
int currentpage;//Current Display page
int pagecount;//Total Pages
int i;
%>
<%
Strpage=request.getparameter ("page");
if (strpage==null)
{
currentpage=1;
}
Else
{
Currentpage=integer.parseint (strpage);
if (currentpage<1)
{
currentpage=1;
}
}
%>
<%
try{
Class.forName ("Sun.jdbc.odbc.JdbcOdbcDriver");
Url= "Jdbc:odbc:university";
Conn=drivermanager.getconnection (URL, "Guo", "194871213");
Stmt=conn.createstatement (resultset.type_scroll_insensitive,resultset.concur_read_only);
Sql= "SELECT * from student";
Rs=stmt.executequery (SQL);
Rs.last ();
Rowcount=rs.getrow ();
Pagecount= (rowcount+pagesize-1)/pagesize;
if (Currentpage>pagecount)
{
Currentpage=pagecount;
}
}
catch (Exception e)
{
Out.print (e);
}
%>
<body>
<div align= "center" >
<font size= "6" color= "Blue" ><b>jsp paging feature </b></font>
</div>
<table border= "1" align= "center" cellpadding= "1" cellspacing= "1" >
<tr>
&LT;TD width= "16%" align= "Center" > School Number </td>
&LT;TD width= "16%" align= "center" > Name </td>
&LT;TD width= "8%" align= "center" > Gender </td>
&LT;TD width= "8%" align= "center" > Age </td>
&LT;TD width= "12%" align= "center" > Birthplace </td>
&LT;TD width= "12%" align= "center" > Faculty </td>
&LT;TD width= "20%" align= "center" > Change </td>
&LT;TD width= "20%" align= "center" > Delete </td>
</tr>
<%
if (pagecount>0)
{
Rs.absolute ((currentPage-1) *pagesize+1);
i=0;
while (I<pagesize &&!rs.isafterlast ())
{
No=rs.getstring ("Xuehao");
%>
<tr>
&LT;TD width= "16%" align= "Center" >
<%=NO%>
</td>
&LT;TD width= "16%" align= "Center" >
<%=rs.getobject (2)%>
</td>
&LT;TD width= "8%" align= "Center" >
<%=rs.getobject (3)%>
</td>
&LT;TD width= "8%" align= "Center" >
<%=rs.getobject (4)%>
</td>
&LT;TD width= "12%" align= "Center" >
<%=rs.getobject (5)%>
</td>
&LT;TD width= "12%" align= "Center" >
<%=rs.getobject (6)%>
</td>
&LT;TD width= "18%" align= "Center" >
<a href= "change.jsp?xuehao=<%=no%>" > Modification </a>
</td>
&LT;TD width= "18%" align= "Center" >
<a href= "del.jsp?xuehao=<%=no%>" > Delete </a>
</td>
</tr>
<%
Rs.next ();
i++;
}
}
Rs.close ();
Stmt.close ();
Conn.close ();
%>
</table><br>
<div align= "center" >
<%=currentPage%> page Total <%=pageCount%> page <%if (currentpage<pagecount) {%><a href= Seperatepage.jsp?page=<%=currentpage+1%> "> next page </a>
<%
}
if (currentpage>1) {%><a href= "seperatepage.jsp?page=<%=currentpage-1%>" > Prev </a>
<%
}
if (pagecount>0)
{
int n;
for (n=1;n<=pagecount;n++)
{
%>
<a href= "seperatepage.jsp?page=<%=n%>" > <%=n%> page </a>
<%
}
}
%>
</div>
</body>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More