regist.java

JSP+servlet 登陆注册模块还可以进行信息的修改

package com.weishuang.servlet;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
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.weishuang.dao.UserDAO;
import com.weishuang.exception.UserExistException;
import com.weishuang.pojo.Message;
import com.weishuang.pojo.User;
import com.weishuang.util.StringEncoder;

/**
 * Servlet implementation class Regist
 */
public class Regist extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Regist() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		String username=StringEncoder.encode(request.getParameter("username"));
		String password=request.getParameter("password");
		User u=new User();
		u.setUsername(username);
		u.setPassword(password);
		UserDAO dao=new UserDAO();
		String success="index.jsp";
		String failure="regist.jsp";
		boolean registSuccess=false;
		try {
			registSuccess=dao.regist(u);
		} catch (UserExistException e) {
			System.out.println("该用户已存在");
			Message msg=new Message();
			msg.setMsg("该用户名已经被注册");
			request.setAttribute("error", msg);
			RequestDispatcher rd=request.getRequestDispatcher(failure);
			rd.forward(request, response);
			return ;
		}
		if(registSuccess){
			System.out.println("注册成功");
			HttpSession session=request.getSession();
			session.setAttribute("user", u);
			RequestDispatcher rd=request.getRequestDispatcher(success);
			rd.forward(request, response);
//			response.sendRedirect(success);
			return ;
		}
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		this.doGet(request, response);
	}

}