search.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 search 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();
		data dt = new data();	
		
		String type = request.getParameter("type");
		String bookName = request.getParameter("bookName");
		String userName = request.getParameter("userName");
		
		try{
			Connection con = dbwork.getconnection();
			if("Ubook".equals(type)){
				if(!"".equals(bookName)&&bookName!=null){
					Bookar = dt.Search(con, bookName, "book");	
					session.setAttribute("booklist", Bookar);
					response.sendRedirect("User.jsp?t=1");
				}else if("".equals(bookName)){							
					response.sendRedirect("User.jsp?t=2");
				}
			}else{
				if(!"".equals(bookName)&&bookName!=null){
					Bookar = dt.Search(con, bookName, "book");	
					session.setAttribute("booklist", Bookar);
					response.sendRedirect("BookMessage.jsp?t=1");
				}else if(!"".equals(userName)&&userName!=null){					
					Userar = dt.Search(con, userName, "admin");							
					session.setAttribute("userlist", Userar);
					response.sendRedirect("UserMessage.jsp?t=1");				
				}else if("".equals(bookName)){
					response.sendRedirect("BookMessage.jsp?t=2");
				}else if("".equals(userName)){
					response.sendRedirect("UserMessage.jsp?t=2");
				}				
			}
			
		}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);
	}

}