WebRoot/dingdando.jsp

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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="com.util.*"%>

<%
/*
订单添加后台
*/
DBO db=new DBO();//初始数据库链接
request.setCharacterEncoding("gb2312");//设置字符集
ResultSet rs=null;//声明结果集
	String keyid =(String)request.getParameter("keyid");
String ddbh=(String)request.getParameter("ddbh");//变量:订单编号
String nr=(String)request.getParameter("nr");//变量:内容
String cw=(String)request.getParameter("cw");//变量:宠物
String xdsj=(String)request.getParameter("xdsj");//变量:下单时间
String shdz=(String)request.getParameter("shdz");//变量:送货地址
String yh=(String)request.getParameter("yh");//变量:用户
String lxdh=(String)request.getParameter("lxdh");//变量:联系电话
String zt=(String)request.getParameter("zt");//变量:状态

String sql="";//声明sql
 
;//订单SQL 语句
int row=1;///定义执行结果
int a=0;		
try{

	sql="select count(1) as num from dingdan where yh='"+yh+"' and cw='"+cw+"'";
	rs=db.query(sql);
	if(rs.next()){
	a=rs.getInt("num");
	}
	if(a>0){
	out.println("<script>");
out.println("alert('操作失败，你已经提交了订单');");
out.println("window.history.go(-1);");
out.println("</script>");
	return;
	}
	
	sql="insert into dingdan(ddbh,nr,cw,xdsj,shdz,yh,lxdh,zt) values('"+ddbh+"','"+nr+"','"+cw+"','"+xdsj+"','"+shdz+"','"+yh+"','"+lxdh+"','"+zt+"')";
		//int row =0;
		row=db.update(sql);
}catch(Exception e){
System.out.println(e.toString());}
if(row==1){
out.println("<script>");
out.println("alert('操作成功');");
out.println("window.location='mydingdan.jsp'");
out.println("</script>");
}else{
out.println("<script>");
out.println("alert('操作失败');");
out.println("window.location='mydingdan.jsp'");
out.println("</script>");
}
db.close();
%>