canceldd.jsp

用JSP写的一个在线购物网站的代码

<%@ page contentType="text/html;charset=gb2312" import="java.sql.*" %>
<jsp:useBean id="data" scope="page" class="shop.data.conn" />
<%
String member=(String)session.getValue("manager");
if(member=="" && member==null)
{%>
<script language="JavaScript">
alert("请登陆后再进入用户管理后台");
history.back();
</script>
<%}else{
String sql="select * from manager where name='"+member+"'";
ResultSet rs=data.executeQuery(sql);
if(!rs.next())
{%>
<script language="JavaScript">
alert("对不起，您的用户名不存在或已被删除");
history.back();
</script>
<%}}%>
<%
String id=request.getParameter("id");
String sql="select * from dingdan where dingdanid='"+id+"'";
ResultSet rs=data.executeQuery(sql);
rs.next();
String censor_yes=rs.getString("censor_yes");
rs.close();
if(censor_yes.equals("1"))
{%>
<script language="JavaScript">
alert("对不起，该定单已被审核，不能取消");
history.back();
</script>
<%}else{
sql="delete from dingdan where dingdanid='"+id+"'";
rs=data.executeQuery(sql);
sql="delete from buyware where buyid='"+id+"'";
rs=data.executeQuery(sql);
response.sendRedirect("manager.jsp?show=dingdan");
}
%>