showchange.java

整个系统采用MVC开发模式

package Manager;

import java.io.IOException;
import java.io.PrintWriter;
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.Goods;
import bean.GoodsDao;

public class ShowChange extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html; charset=GBK");
		response.setHeader("Cache-Control", "no-cache");
	
		String bookid = request.getParameter("change");
		Goods singlegood = new Goods();
		PrintWriter out = response.getWriter();
		
		GoodsDao goodsdao=new GoodsDao();
		HttpSession session=request.getSession();

       ArrayList<Goods> singleresult=new ArrayList<Goods>();
	    System.out.println("NNN");
       String sql = "select * from goods where bookid=" +bookid;
			try {
				singleresult=goodsdao.goodsSelect(sql);
				System.out.print("abc");
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			session.setAttribute("singleresult", singleresult);
			response.sendRedirect("GoodsManage/GoodsInfo.jsp");
			}
		
	
			
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doGet(request, response);
	}

}