Cookie的属性用法技巧 Cookie的使用方法介绍_cookie储存属性怎么用-优快云博客

本文详细介绍了如何在Java Spring框架中使用Cookie进行用户身份验证，包括Cookie的创建、读取及更新，确保了用户的会话状态在浏览器与服务器间的有效传递。

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Cookie的使用

浏览器保存Cookie的值：response

服务端从request获取Cookie的值

@Controller("user_controller")
@RequestMapping("/user")
public class UserController{

@Autowired
@Qualifier("userService") /* 一个接口多个实现用name区分*/
private IUserService userService;

@RequestMapping("/")
public String list(Model model,HttpServletResponse response) {

//1、保存cookie的值
String token = UUID.randomUUID().toString();
Cookie cookie=new Cookie("token",token);
cookie.setMaxAge(60*60*24);
cookie.setPath("/");
response.addCookie(cookie);

System.out.println("token: "+token);
List<UserPO> list = null;
model.addAttribute("userList", list);
return "user/index";
}

private String getCookieToken(HttpServletRequest request){
Cookie[]cookies= request.getCookies();
for(Cookie c:cookies){
if(c.getName().equals("token")){
return c.getValue();
}
}
return null;
}

private void addCookie(HttpServletResponse response,String token){
//redisService.set("user","token",user);
Cookie cookie=new Cookie("token",token);
cookie.setPath("/");
cookie.setMaxAge(60*60*24);
response.addCookie(cookie);
}

@RequestMapping("/{id}")
public String get(@PathVariable String id, Model model,
HttpServletRequest request, HttpServletResponse response){
//2、获取cookie的值
String cookieToken=getCookieToken(request);
System.out.println("token: "+cookieToken);
if(cookieToken==null){
return null;
}else{
// Users user=redisService.get(UserKeyPrefix.user, token, Users.class);
/*
* 还需要将cookie重新发给浏览器，重新设置token到redis
* 以便于刷新过期时间
*/
addCookie(response,cookieToken);
}
UserVO user = new UserVO();
model.addAttribute("user", user);
//"forward:index";
//return "redirect:index";
return "index";
}
}