oracle实现分页总结
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8" import="java.sql.*"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Oracle和Jsp的分页程序</title>
</head>
<body>
<%
out.print("<table>");
int pageSize =3;//每页显示3条
int pageCount = 0;//总页数
int intRowCount = 0;//总记录数，可通过查询得到总得多少行
int currentPage =1;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection(
"jdbc:oracle:thin:@127.0.0.1:1521:ORCL", "scott", "tiger");
Statement st = conn.createStatement();
ResultSet rs2 = st.executeQuery("select count(*) totalRows from emp");//总记录数
out.print("<tr>");
if(rs2.next()){
intRowCount=rs2.getInt("totalrows");
out.print("<td>"+"总记录数是："+intRowCount+"</td>");
}
out.print("</tr>");
if(intRowCount%pageSize==0){
pageCount=intRowCount/pageSize;
}else{
pageCount=intRowCount/pageSize+1;
}
out.print("<tr><td>总共有"+ pageCount+"页</td></tr>");
String StrPage=request.getParameter("page");
if(StrPage==null){
currentPage=1;
}else{
currentPage=Integer.parseInt(StrPage);
if(currentPage<1) currentPage=1;
}
out.print("<tr><td>姓名</td><td>薪水</td></tr>");
ResultSet rs = st.executeQuery("select a2.* from (select a1.*, rownum rn from (select ename,sal from emp) a1 where rownum<="+currentPage*pageSize+") a2 where a2.rn>="+(pageSize*(currentPage-1)+1)+" ");
while(rs.next()){
out.print("<tr>");
out.print("<td>"+rs.getString("ename")+"</td>");
out.print("<td>"+rs.getString("sal")+"</td>");
out.print("</tr>");
}
out.print("</table>");
for( int i=1;i<=pageCount;i++){
out.print("<a href=myoracle.jsp?page="+i+">["+ i+"]</a>");
}
out.print("<tr><td>现在是第"+ StrPage+"页</td></tr>");
conn.close();
st.close();
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
%>
</table>
</body>
</html>
