java - Autowired 注释在 AuthenticationSuccessHandler 中返回 null

Question

在我的 Spring Security 应用程序中，我尝试在成功登录后返回 cookie 'remember_token'。我的 AuthenticanSuccessHandler 类自动连接 RememberMeService 类以从数据库获取“ token ”值。但 Autowiring 的引用 rememberMeService 返回 null。我确实提到了该类的 @Component 注释，但它并没有改变结果。 Link to complete source code

FormAuthenticationSuccessHandler:

package com.fastcheck.timesheet.common.security;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.stereotype.Component;

import com.fastcheck.timesheet.common.services.RememberMeService;


@Component
public class FormAuthenticationSuccessHandler implements AuthenticationSuccessHandler
{
    @Autowired
    public RememberMeService rememberMeService;

@Override
public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
        Authentication authentication) throws IOException, ServletException
{

    String username;
    Object principal = authentication.getPrincipal();
    if (principal instanceof UserDetails) 
        {
            username = ((UserDetails)principal).getUsername();
        } 
        else 
        {
            username = principal.toString();

        }

    System.out.println("rememberMeService :"+rememberMeService);
    if(rememberMeService != null)
        {
            Cookie cookie=new Cookie("remember_token",rememberMeService.getRememberMeToken(username));
            cookie.setMaxAge(200);
            response.addCookie(cookie);
        }


    response.setStatus(200);
    response.sendRedirect("home");


}

}

Answer 1

我从您的代码中了解到，您正在尝试实现 Spring Security 为您提供开箱即用的功能。

如果您正确实现了 Spring Security，我不明白为什么在成功进行身份验证后，记住我 token 不会像您尝试做的那样自动存储在用户的浏览器上。