java - 登录时在 spring security 中更改用户名

Question

我想在该用户登录系统时更改用户名。我实现了自己的 crypt 算法，无法获得真实密码来进行新的身份验证并将其放入

Authentication authentication = new UsernamePasswordAuthenticationToken(principal, credentials);

Answer 1

登录后，您可以使用以下代码更改您的用户名和密码:

Collection<SimpleGrantedAuthority> nowAuthorities = 
  (Collection<SimpleGrantedAuthority>)SecurityContextHolder.getContext()
                                                           .getAuthentication()
                                                           .getAuthorities();
UsernamePasswordAuthenticationToken authentication = 
  new UsernamePasswordAuthenticationToken(username, password, nowAuthorities);

SecurityContextHolder.getContext().setAuthentication(authentication);