?? registerservlet.java
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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 加入驗證碼防止重復提交
List list=userDAO.getUserByName(request.getParameter("name"));
if(list.size()>0){
// 用戶名存在
request.setAttribute("msg", "用戶名已經存在,請重新選擇用戶名");
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){
// 注冊成功,跳轉index.jsp
//request.getRequestDispatcher("/index.jsp").forward(request, response);
response.sendRedirect("index.jsp");
}else{
// 注冊失敗,跳轉到register.jsp
// request.setAttribute("msg", "注冊失敗,請聯系管理員");
// request.getRequestDispatcher("/register.jsp").forward(request, response);
String []params={"msg"};
String []values={"注冊失敗,請聯系管理員!"};
response.sendRedirect(URLEncoder.encodeURL("register.jsp",params,values,"utf-8"));
}
}
}
}
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