useraction.java

jsp+javabean+servlet案例

package action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ResourceBundle;

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

import dao.userDao;

import Beans.userDto;

public class userAction 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 {

	     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 {
      
	  String action=request.getParameter("action");	
	  userDto dto=new userDto();
	  userDao dao=new userDao();
	  RequestDispatcher dispatcher=null;
	  if(action!=null&&action.equals("login"))
	  {
		 dto.setName(request.getParameter("name")) ;
		 dto.setPass(request.getParameter("pass"));
		 boolean f=false;
		 f=dao.login(dto);
		 
		 ResourceBundle res=ResourceBundle.getBundle("msg");
		 if(f==true)
		 {
		 request.setAttribute("login",res.getString("login.ok"));		 	 
		 }
		 else
		 {
			 request.setAttribute("error",res.getString("login.error"));		 			
		 }
		
	   }
	 if(action!=null&&action.equals("del"))
		 {
		  int i=0;
		  String id=request.getParameter("id");
		  i=dao.delbook(id);
		  ResourceBundle res=ResourceBundle.getBundle("msg");
			 if(i!=0)
			 {
			 request.setAttribute("del",res.getString("del.ok"));		 	 
			 }
			 else
			 {
				 request.setAttribute("del",res.getString("del.error"));		 			
			 }
	  }
	 
	 if(action!=null&&action.equals("update"))
	 {
	  int i=0;
	 dto.setId(request.getParameter("id"));
	 dto.setName(request.getParameter("name"));
	 dto.setPass(request.getParameter("pass"));
	  i=dao.upbook(dto);
	  ResourceBundle res=ResourceBundle.getBundle("msg");
	  if(i!=0)
		 {
		 request.setAttribute("update",res.getString("update.ok"));		 	 
		 }
		 else
		 {
			 request.setAttribute("update",res.getString("update.error"));		 			
		 }
  }
		
	 dispatcher =request.getRequestDispatcher("/msg.jsp")	 ;
	 dispatcher.forward(request,response);

 }
}