企业招聘平台-06-登录注册功能的开发

登录成功页面不显示

页面提示了登录成功，但是页面空白

TypeError: Cannot read properties of null (reading ‘id’)

还有一种类似的报错，以后你们遇到了也是同样的原因：

TypeError: Cannot read properties of undefined (reading ‘id’)

这类问题是什么意思呢？

打个比方：我在代码里有这样的一个 user.id，当这个user是null或者undefined的时候，就会报上述的错误了。

if (RoleEnum.EMPLOY.name().equals(account.getRole())) {
    loginAccount = employService.login(account);
}
if (RoleEnum.USER.name().equals(account.getRole())) {
    loginAccount = userService.login(account);
}

登录成功又拉回登录页面

定位问题，首先你一定要定位到它的位置。

if (RoleEnum.EMPLOY.name().equals(role)) {
    account = employService.selectById(Integer.valueOf(userId));
}
if (RoleEnum.USER.name().equals(role)) {
    account = userService.selectById(Integer.valueOf(userId));
}

TokenUtils

@Resource
private AdminService adminService;
@Resource
private EmployService employService;
@Resource
private UserService userService;

private static AdminService staticAdminService;
private static EmployService staticEmployService;
private static UserService staticUserService;

@PostConstruct
public void init() {
    staticAdminService = adminService;
    staticEmployService = employService;
    staticUserService = userService;
}
if (RoleEnum.EMPLOY.name().equals(role)) {
    return staticEmployService.selectById(userId);
}
if (RoleEnum.USER.name().equals(role)) {
    return staticUserService.selectById(userId);
}

@PostMapping("/register")
public Result register(@RequestBody Account account) {
    if (RoleEnum.EMPLOY.name().equals(account.getRole())) {
        employService.register(account);
    }
    if (RoleEnum.USER.name().equals(account.getRole())) {
        userService.register(account);
    }
    return Result.success();
}
public void register(Account account) {
    Employ employ = new Employ();
    BeanUtils.copyProperties(account, employ);
    employ.setStatus("待审核");
    add(employ);
}
public void register(Account account) {
    User user = new User();
    BeanUtils.copyProperties(account, user);
    add(user);
}