delete.java

图书信息管理系统

package com.servlet;

import java.io.IOException;
import java.sql.Connection;
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 com.DBwork;
import com.data;

public class delete 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 {
		request.setCharacterEncoding("GB2312");
		HttpSession session = request.getSession();
		ArrayList Bookar = new ArrayList();
		ArrayList Userar = new ArrayList();
		DBwork dbwork = new DBwork();
		String id = request.getParameter("id");
		String type = request.getParameter("type");		
		data dt = new data();
		boolean bool = false;
		
		try{
			Connection con = dbwork.getconnection();
			bool = dt.delMessage(type, con, id);
			if(bool){
				Bookar = dt.MessageRebook();
				Userar = dt.MessageReMe();
				session.setAttribute("booklist", Bookar);
				session.setAttribute("userlist", Userar);
				if("admin".equals(type)){
					response.sendRedirect("UserMessage.jsp?t=1");					
				}else if("book".equals(type)){
					response.sendRedirect("BookMessage.jsp?t=1");	
				}
			}else{
				response.sendRedirect("error.jsp");
			}
		}catch(Exception e){
			e.printStackTrace();
		}
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @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 doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request,response);
	}

}