spring框架下@value注解属性static无法获取值问题

@Value("${appId}")
private static String appid;

private static String appid;
 @Value("${appId}")
    public void setAppid(String appId) {
        this.appid = appid;
    }

@Value("${ftpIP}")
private String ftpIP;

@Value("${ftpIP}")
private static String ftpIP; 
@Value("${ftpUserName}")
private final String ftpUserName;

public class FTPManagerService { 
    @Value("${ftpIP}")
 private static String ftpIP; 
}

public class FTPManagerService { 
    @Value("${ftpIP}")
 private static String ftpIP; 
}
 
public class Test{
    /*错误用法*/
    FTPManagerService  f = new FTPManagerService ();
 
    /*正确用法*/
    @Autowired
    FTPManagerService  f2;
}