querybookcontrolpro.java

简单的图书馆管理系统

package com.controller;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;
import java.util.Vector;

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

import com.common.DBaccess.QueryBookProcess;

public class QueryBookControlPro extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public QueryBookControlPro() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * 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 {
			doPost(request,response);
	}

	/**
	 * 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 {
		request.setCharacterEncoding("gb2312");
		if(request.getParameter("name").equals("query"))
		{
			String parameter=request.getParameter("select");
			String value=request.getParameter("value");
			Vector vv=null;
			QueryBookProcess qbp=new QueryBookProcess();
			if(parameter.equals("bookName"))
			{
				vv=qbp.getBookByName("Title",value);
			}
			if(parameter.equals("author"))
			{
				vv=qbp.getBookByName("Author",value);
			}
			if(parameter.equals("isbn"))
			{
				vv=qbp.getBookByName("ISBN",value);
			}
			System.out.println(vv.size());
			request.setAttribute("bookValue",vv);
			
			//必须封装
			request.setAttribute("title","图书查询");
			request.setAttribute("URL","/view/QeuryBook.jsp");
			
			RequestDispatcher dis=this.getServletContext().getRequestDispatcher("/index.jsp");
			dis.forward(request,response);		
				
		}
		if(request.getParameter("name").equals("lookUp"))
		{
			Hashtable hhs=null;
			String bookid=request.getParameter("bookid");
			QueryBookProcess qbp=new QueryBookProcess();
			hhs=qbp.getBookByID(Integer.valueOf(bookid).intValue());
			System.out.println(hhs);
			request.setAttribute("bookMainInfo",hhs);
			
			//馆藏信息
			Hashtable hs=qbp.getBookInfo(Integer.valueOf(bookid).intValue());
			request.setAttribute("bookInfo",hs);
			
			request.setAttribute("title","图书详细信息");
			request.setAttribute("URL","/view/BookView.jsp");
			
			RequestDispatcher dis=this.getServletContext().getRequestDispatcher("/index.jsp");
			dis.forward(request,response);
//			
		}
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}