shiro 获取已经登录的用户

//shiro 获取登录的用户信息
TUser user = (TUser)SecurityUtils.getSubject().getPrincipal();

//前提是需要的在登录的认证的方法中存入已经登录的用户如下

 代码如下

@Override
protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
    System.out.println("-------身份认证方法--------");
    String userName = (String) authenticationToken.getPrincipal();
    String userPwd = new String((char[]) authenticationToken.getCredentials());
    QueryWrapper<TUser> queryWrapper=new QueryWrapper<>();
    queryWrapper.eq("username",userName);
    TUser one = userService.getOne(queryWrapper);//根据用户名从数据库获取密码
    if(one==null){
        throw new AccountException("用户不正确");
    }
   if (!userPwd.equals(one.getPassword() )) {
        throw new IncorrectCredentialsException("密码不正确");
    }
   //用户存入shiro 缓存
    SimpleAuthenticationInfo info =new SimpleAuthenticationInfo(one, one.getPassword(),getName());
    return info;
}