【Cookie】java.lang.IllegalArgumentException An invalid character [32] was present in the Cookie value

创建时间：6.30

java.lang.IllegalArgumentException: An invalid character [32] was present in the Cookie value

报错原因：

Tomcat 8.5版本，在cookie值中不能使用空格。

代码：

 1 protected void doGet(HttpServletRequest request, HttpServletResponse response)
 2             throws ServletException, IOException {
 3
 4         Date date = new Date();
 5         SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
 6         String currentTime = format.format(date);
 7
 8         Cookie accessTime = new Cookie("lastAccessTime",currentTime);
 9         accessTime.setMaxAge(60*50);
10         response.addCookie(accessTime);
11
12         String lastAccessTime=null;
13         Cookie[] cookies = request.getCookies();
14         if (cookies != null) {
15             for(Cookie cookie:cookies) {
16                 if(cookie.getName().equals("laseAccessTime")) {
17                     lastAccessTime=cookie.getValue();
18                 }
19             }
20         }
21
22         if(lastAccessTime==null) {
23             response.setContentType("text/html;charset=UTF-8");
24             response.getWriter().write("您是第一次访问");
25             System.out.println(lastAccessTime);
26         }
27         else {
28             response.getWriter().write("您上次访问的时间是："+lastAccessTime);
29         }
30
31     }

问题出在这里：日期格式有空格，换成/即可

原文地址：https://www.cnblogs.com/musecho/p/11237165.html