Cookie操作以及如何在js中调用jsp变量

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存Cookie

Cookie idCookie = new Cookie("userId", request.getParameter("id"));Cookie psdCookie = new Cookie("psd", request.getParameter("psd"));idCookie.setMaxAge(3600);//存3600秒也就是1小时psdCookie.setMaxAge(3600);response.addCookie(idCookie);response.addCookie(psdCookie);

取Cookie

      Cookie cookies[] = request.getCookies();      if(cookies != null){          System.out.println("**********" + cookies.length);          for(int i = 0; i < cookies.length; i++){              if(cookies[i].getName().equals("userId")){                  user_id = cookies[i].getValue();              }else{                  if(cookies[i].getName().equals("psd")){                      psd = cookies[i].getValue();                  }              }              if(user_id != null && psd != null){                  break;              }          }

在 js 中调用 jsp 变量

  <script language="javascript">      document.loginform.id.value = '<%=user_id == null ? "" : user_id%>';      document.loginform.psd.value = '<%=psd == null ? "" : psd%>';  </script>

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