看程式碼先

@Component//必須有，使當前類成為一個bean物件。
public class CheckUntil {
    @Autowired
    private ReadApplicationUntil readApplicationUntil;
    private static ReadApplicationUntil readApplicationUntils;


    @PostConstruct
    public void init() {
        ReadApplicationUntils = readApplicationUntil;
    }
    public static boolean checkSignatures(String signature, String timestamp, String nonce) {

        String[] strings = new String[]{nonce, ReadApplicationUntils.getToken(), timestamp};
        Arrays.sort(strings);
        StringBuffer stringBuffer = new StringBuffer();
        for (String string : strings) {
            stringBuffer.append(string);
        }
        if (SHA1.encode(stringBuffer.toString()).equals(signature)) {
            return true;
        }
        return false;
    }
}

 

@Component要用到

@Autowired
private ReadApplicationUntil readApplicationUntil; 載入的類
private static ReadApplicationUntil readApplicationUntils; static類

要用到

@PostConstruct//初始化的時候進行的操作註解
public void init() {
    readApplicationUntils = readApplicationUntil;
    //這裡需要把static類 和需要載入的類對調，就可以使用static載入readApplicationUntil對應的類方法了
     }
 

@PostConstruct註解作用：Spring允許開發者在受管Bean中使用它。當DI容器例項化當前受管Bean時，@PostConstruct註解的方法會被自動觸發，從而完成一些初始化工作，