Login.jsp
<form name = "f1" method="get" action="servlet/LoginServlet">
<table>
<tr>
<td>Username:</td>
<td><input type="text" name="username" value="${un}"></td>
</tr>
<tr>
<td>Password:</td>
<td><input type="password" name = "password" value="${pw}"></td>
</tr>
<tr>
<td>AutoLogin:</td>
<td><input type="checkbox" name = "auto" value = "1"></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="Login"> </td>
</tr>
</table> </form>
PrepareLogin
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Cookie[] cs = request.getCookies();
if(cs!=null && cs.length>0){
for(int i = 0 ; i < cs.length ; i++){
Cookie c = cs[i];
System.out.println(cs.length);
System.out.println(i+"--"+cs[i].getName());
if(c.getName().equals("username")){
String value = c.getValue();
request.setAttribute("un", value);
System.out.println(value);
}
if(c.getName().equals("password")){
String value = c.getValue() ;
request.setAttribute("pw", value); //将值传递给jsp页面
System.out.println(value);
}
}
}
request.getRequestDispatcher("/login.jsp").forward(request, response);
}
保存Cookie
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String auto = request.getParameter("auto");
String username = request.getParameter("username");
String password = request.getParameter("password");
if(auto != null && auto.equals("1")){
Cookie u = new Cookie("username", username);
Cookie p = new Cookie("password",password);
u.setMaxAge(60*60);
p.setMaxAge(60*60);
response.addCookie(u);
response.addCookie(p);
}
PrintWriter w = response.getWriter();
w.println("<html>"+
"Hello"+
"</html>"
);
w.flush();
w.close();
}