registerservlet.java

java web网络编程示例,原代码资源

package edu.liusong.servlet;

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

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

import edu.liusong.common.DBConnect;
import edu.liusong.common.MD5;
import edu.liusong.common.URLEncoder;
import edu.liusong.dao.UserDAO;
import edu.liusong.mo.User;

public class RegisterServlet extends HttpServlet {
	UserDAO userDAO = new UserDAO();

	/**
	 * 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 {
		//TODO  加入验证码防止重复提交
		List list=userDAO.getUserByName(request.getParameter("name"));
		if(list.size()>0){
			// 用户名存在
			request.setAttribute("msg", "用户名已经存在，请重新选择用户名");
			this.getServletContext().getRequestDispatcher("/register.jsp").forward(request, response);
		}else{
			User user=new User();
			user.setName(request.getParameter("name"));
			user.setPassword( new MD5().getMD5ofStr(request.getParameter("password")));
			user.setDepartment(request.getParameter("department"));
			int i=userDAO.save(user);
			if(i>0){
				// 注册成功,跳转index.jsp
				//request.getRequestDispatcher("/index.jsp").forward(request, response);
				response.sendRedirect("index.jsp");
			}else{
				// 注册失败，跳转到register.jsp
//				request.setAttribute("msg", "注册失败，请联系管理员");				
//				request.getRequestDispatcher("/register.jsp").forward(request, response);
				String []params={"msg"};
				String []values={"注册失败，请联系管理员!"};
				response.sendRedirect(URLEncoder.encodeURL("register.jsp",params,values,"utf-8"));
			}
			
		}
		
	}
}