今天进行了登陆界面的实现，包括登陆注册，记住密码，验证码注册。
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
private UserService service = new UserService();
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//1接受用户名和密码
String username=request.getParameter("username");
String password = request.getParameter("password");
String remember = request.getParameter("remember");
User user = service.login(username, password);
if (user !=null){
//登陆成功
//获取复选框数据
if ("1".equals(remember)){
//勾选，发送cookie
//创建cookie,
Cookie c_username=new Cookie("username",username);
Cookie c_password=new Cookie("password",password);
//设置存活时间
c_username.setMaxAge(60*60*24*7);
c_password.setMaxAge(60*60*24*7);
//2.发送
response.addCookie(c_username);
response.addCookie(c_password);
}
//将user对象存储到session
HttpSession session = request.getSession();
session.setAttribute("user",user);
String contextPath = request.getContextPath();
response.sendRedirect(contextPath+"/selectAllServlet");
}else {
//失败，跳转回
//存储错误信息到request
request.setAttribute("login_mag","用户名或密码错误");
//跳转到login.jsp
request.getRequestDispatcher("/login.jsp").forward(request,response);
}
}
@WebServlet("/registerServlet")
public class RegisterServlet extends HttpServlet {
private UserService service = new UserService();
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String username=request.getParameter("username");
String password = request.getParameter("password");
User user =new User();
user.setUsername(username);
user.setPassword(password);
//获取用户输入的验证码
String checkCode = request.getParameter("checkCode");
//程序生成的验证码,从session
HttpSession session = request.getSession();
String checkCodeGen = (String) session.getAttribute("checkCodeGen");
//比对
if(!checkCodeGen.equalsIgnoreCase(checkCode)){
request.setAttribute("register_mag","验证码错误");
request.getRequestDispatcher("/register.jsp").forward(request,response);
//不允许注册
return;
}
//调用service注册
boolean register = service.register(user);
//判断成功与否
if(register){
//成功，到登录页面
request.setAttribute("register_mag","注册成功，请登录");
request.getRequestDispatcher("/login.jsp").forward(request,response);
}else {
//失败，到注册页面
request.setAttribute("register_mag","用户名已存在");
request.getRequestDispatcher("/register.jsp").forward(request,response);
}
}