java连接oracle数据库 -- 直接用jsp访问连接
1. 创建jsp文件
2. import加入sql包
3. 编写主要的jsp文件
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<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 is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<body>
<h2>oracle的分页案例</h2>
<table>
<tr>
<td>用户名</td>
<td>薪水</td>
</tr>
<%
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection cc = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:MyOra1","scott","tiger");
Statement sm = cc.createStatement();
//接受分页信息
String s_pageNow = (String)request.getParameter("pageNow");
int pageNow =1;
if(s_pageNow!=null){
pageNow = Integer.parseInt(s_pageNow);
}
//显示页数
int pageCount=0;
int rowCount=0;
int countSize=4;
ResultSet rs = sm.executeQuery("select count(*) from emp");
if(rs.next()){
rowCount = rs.getInt(1);
if(rowCount%countSize==0){
pageCount = rowCount/countSize;
}else{
pageCount = rowCount/countSize + 1 ;
}
}
rs = sm.executeQuery("select * from (select a1.*,rownum rn from (select * from emp) a1 where rownum<="+pageNow*countSize+") where rn>="+((pageNow-1)*countSize+1)+"");
while(rs.next()){
out.print("<tr>");
out.println("<td>" + rs.getString(2)+"</td>");
out.println("<td>" + rs.getString(6)+"</td>");
out.print("</tr>");
}
for(int i=1;i<=pageCount;i++){
out.print("<a href=index.jsp?pageNow="+i+">["+i+"]</a>");
}
//打印总页数
rs.close();
sm.close();
cc.close();
%>
</table>
</body>
</body>
</html>
