Spring Security version 

后端代码：

/*** @author Jerry* @date 2024-03-28 17:47* spring security 切换账号*/@RestController
@RequiredArgsConstructor
@RequestMapping("api/admin")
public class AccountSwitchController {private final UserDetailsService userDetailsService;private final TokenComponent tokenComponent;private final SystemAdminService systemAdminService;@PostMapping("/switchAccount")public CommonResult<SystemLoginResponse> switchAccount(@RequestParam String username) {// 当前登录用户是否是超级管理员LoginUserVo loginUserVo = tokenComponent.getLoginUser(ServletUtils.getRequest());if (loginUserVo == null || loginUserVo.getUser().getId() != 1) {throw new TGOException("非法请求");}Authentication auth = SecurityContextHolder.getContext().getAuthentication();UserDetails targetUser = userDetailsService.loadUserByUsername(username);// 创建一个新的Authentication对象，使用目标用户的详情Authentication newAuth = new UsernamePasswordAuthenticationToken(targetUser, auth.getCredentials(), auth.getAuthorities());// 更新SecurityContextHolder中的认证信息SecurityContextHolder.getContext().setAuthentication(newAuth);LoginUserVo loginUser = (LoginUserVo) newAuth.getPrincipal();SystemAdmin systemAdmin = loginUser.getUser();String token = tokenComponent.createToken(loginUser);SystemLoginResponse systemAdminResponse = new SystemLoginResponse();systemAdminResponse.setToken(token);BeanUtils.copyProperties(systemAdmin, systemAdminResponse);//更新最后登录信息systemAdmin.setLoginCount(systemAdmin.getLoginCount() + 1);systemAdminService.updateById(systemAdmin);// 可以重定向到一个页面，以便更新页面上的用户信息return CommonResult.success(systemAdminResponse, "login success");}
}

 前端代码：

效果：