功能:
从Oracle数据库查询类型及链接、动态显示在桌面
Dao层
public class CheckMenuDao {
private static String DRIVER_NAME="oracle.jdbc.driver.OracleDriver";
private static String DATABASE_URL="jdbc:oracle:thin:@127.0.0.1:1521:orcl";
private static String USER_NAME="scott";
private static String PASSWORD="Oracle11";
public static List findMenu(){
List menuList=new ArrayList();
Connection conn=null;
CallableStatement cstmt=null;
ResultSet rs=null;
System.out.println("连接数据库.....");
try {
Class.forName(DRIVER_NAME);
conn=DriverManager.getConnection(DATABASE_URL, USER_NAME, PASSWORD);
PreparedStatement ps=conn.prepareStatement("select name,url from catagory order by id");
rs=ps.executeQuery();
while(rs.next()){
Menus menu=new Menus();
menu.setMenuName(rs.getString(1));
menu.setMenuUrl(rs.getString(2));
menuList.add(menu);
}
} catch (ClassNotFoundException e) {
System.out.println("");
} catch (SQLException e) {
System.out.println("");
}finally{
try {
if(rs!=null)
rs.close();
if(cstmt!=null)
cstmt.close();
if(conn!=null)
conn.close();
} catch (SQLException e) {
System.out.println("");
}
}
return menuList;
}
}
entity
public class Menus {
private String menuName="";
private String menuUrl="";
//setter\getter
}
Servlet
public class ShowMenu extends HttpServlet{
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
List list=CheckMenuDao.findMenu();
request.setAttribute("Menu", list);
//转发到left.jsp
request.getRequestDispatcher("left.jsp").forward(request, response);
}
}
页面布局:
left.html:
<%@ page language="java" import="java.util.*,dynamic.menu.entity.*" pageEncoding="utf-8"%>
<%
request.setCharacterEncoding("utf-8");
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>标题</title>
<style type="text/css">
<!--
.STYLE1 {
font-size: 16px;
color: #FF9933;
font-weight: bold;
}
.STYLE6 {font-size: 14px; color: #FFFFFF; }
a:link {
color: #FFFFFF;
}
a:visited {
color: #FFFFFF;
}
a:hover {
color: #FF9933;
}
a:active {
color: #9900CC;
}
-->
</style>
</head>
<%
List list=(List)request.getAttribute("Menu");
if(list==null || list.size()==0 ){
list=new ArrayList();
list.add(new Menus());
}
%>
<body topMargin="5px" >
<table width="100%" border="0" cellpadding="5" cellspacing="1" bgcolor="#ff9900">
<tr bgcolor="#cccccc">
<td height="15" align="left" valign="bottom" bgcolor="#cccccc"><span class="STYLE1">显示</span></td>
</tr>
<%
for(int i=0;i<list.size();i++){
Menus menu=(Menus)list.get(i);
%>
<tr bgcolor="#999999">
<td height="12" align="center" bgcolor="#999999" class="STYLE6"><a href="<%=path+"/"+menu.getMenuUrl()+".html" %>" target="mainFrame"><%=menu.getMenuName() %></a></td>
</tr>
<%} %>
</table>
</body>
</html>
right:
<style type="text/css">
<!--
.STYLE2 {font-size: 36px}
.STYLE4 {
font-size: 15px;
font-weight: bold;
}
.STYLE5 {
font-size: 15px;
color: #00FF00;
}
-->
</style>
<table width="100%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="40" align="center" valign="bottom">
<span class="STYLE2">welcome</span>
</td>
</tr>
<tr>
<td height="50" align="center" valign="top">
<span class="STYLE4">welcome to Test Dynamic Menu</span>
</td>
</tr>
<tr>
<td height="50" align="center">菜单
<select name="grant" onchange="parent.document.all.leftFrame.src='grant?grant=' + this.value"/>
<option value="0" selected>请选择</option>
<option value="1" >1</option>
<option value="2" >2</option>
</select>
</td>
</tr>
</table>
index.html:
<frameset rows="*,120" cols="*" frameborder="no" border="0" framespacing="0">
<frameset cols="180,*" frameborder="no" border="0" framespacing="0">
<frame src="left.jsp" name="leftFrame" noresize="noresize" marginwidth="0" marginheight="0" id="leftFrame" title="leftFrame" />
<frame src="main.html" name="mainFrame" marginwidth="0" marginheight="0" id="mainFrame" title="mainFrame" />
</frameset>
</frameset>
<noframes>