?? addcar.java
字號(hào):
package bookshop.bean;
import java.io.*;
import java.sql.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import bookshop.bean.shopcar;
import bookshop.bean.StrClass;
public class AddCar extends HttpServlet{
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
HttpSession session=request.getSession();
String ToJSP="/addCarSuccess.jsp";
String BookNo=request.getParameter("BookNo");
StrClass quanlity=new StrClass(request.getParameter("quanlity"));
if(!quanlity.isNum()){
request.setAttribute("errInf","*請(qǐng)輸入自然數(shù)");
ToJSP="/addcar.jsp";
}else{
Vector list=new Vector();
if(session.getAttribute("carList")!=null){
list=(Vector)session.getAttribute("carList");
session.removeAttribute("carList");
for(int i=0;i<list.size();i++){
shopcar car=(shopcar)list.elementAt(i);
if(BookNo.equals(car.getBookNo())){
list.removeElementAt(i);
break;
}
}
}
shopcar car=new shopcar(BookNo,quanlity.toInt());
list.addElement(car);
session.setAttribute("carList",list);
}
RequestDispatcher dispatcher=request.getRequestDispatcher(ToJSP);
dispatcher.forward(request,response);
}
public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
{
doGet(request,response);
}
}
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