loginservlet.java

MVC留言

package org.bob.control;

import java.io.IOException;
import java.io.PrintWriter;

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

public class LoginServlet extends HttpServlet {

	public void destroy() {
		super.destroy(); 
	}

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		this.doPost(request, response);
	}

	
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String username=request.getParameter("username");
		String userpass=request.getParameter("userpass");
		boolean is=true;
		if(username==null||username.trim().equals("")){
			request.setAttribute("nameerror","用户名必须填");
			is=false;
		}
		
		if(userpass==null||userpass.trim().equals("")){
			request.setAttribute("passerror","密码必须填");
			is=false;
		}
		
		 String url="sendnote.jsp";
		
		if(is){
			url="login.jsp";
		}
		request.getRequestDispatcher(url).forward(request,response);
	}

	
	public void init() throws ServletException {
		
	}

}