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JSP database operation routine data paging display

Source: Internet
Author: User
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js| Pagination | data | database | display


<%@ page contenttype= "Text/html;charset=8859_1"%>

<%
Variable declaration
Java.sql.Connection Sqlcon; Database Connection objects
Java.sql.Statement sqlstmt; SQL Statement Object
Java.sql.ResultSet Sqlrst; Result set Object

Java.lang.String Strcon; Database connection string
Java.lang.String strSQL; SQL statement

int intpagesize; Number of records displayed on one page
int introwcount; Total Records
int intpagecount; Total pages
int intpage; Page number to display
Java.lang.String strpage;

int i;

Set the number of records to display on a page
Intpagesize = 2;

Get the number to display
Strpage = request.getparameter ("page");
if (strpage==null) {//indicates that there is no page this parameter in QueryString, the first page data is now displayed
Intpage = 1;
}
else{//converts a string to an integral type
Intpage = Java.lang.Integer.parseInt (strpage);
if (intpage<1) intpage = 1;
}

Load JDBC Driver
Java.sql.DriverManager.registerDriver (New Oracle.jdbc.driver.OracleDriver ());

To set the database connection string
Strcon = "Jdbc:oracle:thin: @linux: 1521:ora4cweb";

Connecting to a database
Sqlcon = Java.sql.DriverManager.getConnection (Strcon, "Hzq", "hzq");

Create a read-only SQL statement object that can be scrolled
sqlstmt = Sqlcon.createstatement (java.sql.resultset.type_scroll_insensitive,java.sql.resultset.concur_read_only) ;

Preparing SQL statements
strSQL = "Select Name,age from Test";

Execute the SQL statement and get the result set
Sqlrst = Sqlstmt.executequery (strSQL);

Get Total Records
Sqlrst.last ();
Introwcount = Sqlrst.getrow ();

Count Total Pages
Intpagecount = (introwcount+intpagesize-1)/intpagesize;

Adjust the number of pages to be displayed
if (intpage>intpagecount) intpage = Intpagecount;
%>

<meta http-equiv= "Content-type" content= "text/html; charset=gb2312 ">
<TITLE>JSP database operation Routines-data paging display-JDBC 2.0-oracle</title>

<body>

<table border= "1" cellspacing= "0" cellpadding= "0" >
<tr>
<th> name </th>
<th> Age </th>
</tr>

<%
if (intpagecount>0) {
Position the record pointer over the first record of the page you want to display
Sqlrst.absolute ((intPage-1) * intpagesize + 1);

Display data
i = 0;
while (I<intpagesize &&!sqlrst.isafterlast ()) {
%>
<tr>
<td><%=sqlrst.getstring (1)%></td>
<td><%=sqlrst.getstring (2)%></td>
</tr>
<%
Sqlrst.next ();
i++;
}
}
%>

</table>

<%=intPage%> page Total <%=intPageCount%> page <%if (intpage<intpagecount) {%><a href= Jdbc20-oracle.jsp?page=<%=intpage+1%> "> Next page </a><%}%> <%if (intpage>1) {%><a href=" Jdbc20-oracle.jsp?page=<%=intpage-1%> "> Prev </a><%}%>

</body>

<%
Close result set
Sqlrst.close ();

Close an SQL statement object
Sqlstmt.close ();

Close Database
Sqlcon.close ();
%>




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