java - Spring框架，我需要一个变量来依赖于 session

Question

我正在制作一个简单的文件服务器应用程序。该应用程序正在扫描文件的当前位置并将其显示给用户。

我需要一个变量，当前路径是 session 本地的。我想避免一个用户将目录更改为另一用户时的情况。

原样:

User1 is opening home page (current location Z:/), user1 is changing directory to Z:/foo, User2 is opening home page and he is home page is Z:/foo.

成为:

User1 is opening home page (current location Z:/), user1 is changing directory to Z:/foo, User2 is opening home page and he is home page is Z:/, but User1 is still at Z:/foo

我试图使用@Scope(value = WebApplicationContext.SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)

但是要么我(在编码中)犯了一些失败，要么它对我不起作用

Answer 1

您必须创建单独的 session 范围 bean，并在需要 session 范围数据时注入(inject)它 - 即使在应用程序范围 bean 中也是如此。例如

@Scope(value = WebApplicationContext.SCOPE_SESSION, proxyMode = ScopedProxyMode.TARGET_CLASS)
@Component
public class UserSpace{

    private File userRoot=....somehow set that on bean creation - eg at @PostConstruct
   .....other fields if needed
}

然后

@Service
class YoutService{

  @Autowired
  private UserSpace userSpace;// this will be session scoped proxy

}