Java 如何在Spring Security上从CustomUser获取用户ID

使用Sign Spring Security，我试图从CustomUserDetails服务上的loadUserByUsername方法返回的CustomUser实例中获取用户id，就像通过身份验证获取名称（get.Name（））一样。谢谢你的提示

这是我获取已登录用户当前名称的方式：

Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
String name = authentication.getName();

这是CustomUser

public class CustomUser extends User {

    private final int userID;

    public CustomUser(String username, String password, boolean enabled, boolean accountNonExpired,
                      boolean credentialsNonExpired,
                      boolean accountNonLocked,
                      Collection<? extends GrantedAuthority> authorities, int userID) {
        super(username, password, enabled, accountNonExpired, credentialsNonExpired, accountNonLocked, authorities);
        this.userID = userID;
    }
}

---

如果尚未添加

getUserId（）

getter方法，则必须添加该方法。

您可以在控制器中获取userId，如下所示。从这里获取更多信息。请记住，您在创建JWT时已将所需的身份验证信息设置到JWT中，以便使用它们

@Controller
public class GetUserWithHTTPServletRequestController {

    @RequestMapping(value = "/username", method = RequestMethod.GET)
    @ResponseBody
    public String currentUserNameSimple(HttpServletRequest request) {
        Principal principal = request.getUserPrincipal();
        return principal.getName();
    }
}

或如下所示

@PostMapping(value = "/sample")
public String sample(@RequestBody SampleDto sampleDto, Principal principal) {
    String username = principal.getName();
    // You can get other Auth details from principal Object
    return "success";
}

---

主体

可以注入。通过方法参数注入：@AuthenticationPrincipal CustomUser

@Controller
public class GetUserWithHTTPServletRequestController {

    @RequestMapping(value = "/username", method = RequestMethod.GET)
    @ResponseBody
    public String currentUserNameSimple(HttpServletRequest request) {
        Principal principal = request.getUserPrincipal();
        return principal.getName();
    }
}

@PostMapping(value = "/sample")
public String sample(@RequestBody SampleDto sampleDto, Principal principal) {
    String username = principal.getName();
    // You can get other Auth details from principal Object
    return "success";
}