modifybook.java

网上购书系统 采用jsp+servlet+sql2000

package servlet;

import java.io.IOException;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import bean.Book;



public class ModifyBook extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		HttpSession session=request.getSession(false);
		ArrayList arraylist=(ArrayList)session.getAttribute("books");
		session.removeAttribute("books");
		int id=Integer.parseInt(request.getParameter("id"));
		for(int i=0;i<arraylist.size();i++){
			Book book=(Book)arraylist.get(i);
			if(id == book.getId()){
				request.setAttribute("book", book);
				break;
			}
		request.getRequestDispatcher("book.jsp").forward(request, response);
		}
	}

	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		super.doGet(request, response);
	}

}