Question

我在CORBA中创建了一个应用程序，允许用户仅在运行时注册和存储信息。我必须为每个注册用户分配一个唯一的ID。唯一ID必须是第一个用户的格式0001，第二个用户的0002，等等。看过网络后，我找不到很多关于如何以这种格式分配这些数字的方法。

为每位客户分配唯一ID。唯一ID基于由服务器维护的计数器。第一次注册将被分配ID 0001，但表示为字符串。

我的仆人代码如下：

公共类AccountServant实现AccountManagerOperations {

double topupBalance = 0;
int credit = 0;
int uid = 0;

public void topup(double amount){
        topupBalance = topupBalance+amount;
        credit = credit +1;
    }

    public double getBalance(){
        return topupBalance;
    }

    public int getUniqueID(){
        DecimalFormat decimalFormat = new DecimalFormat("0000");
        uid = uid +1;
        return uid;
}

public static Hashtable hashtable = new Hashtable();

public static ORB orb;

public AccountServant (org.omg.CORBA.ORB orb){

    this.orb=orb;
}

public void storeAccountDetails (AnyTopUpAccount.KamaradAccountDetails myKamaradAccountDetails){
    hashtable.put(myKamaradAccountDetails.name, myKamaradAccountDetails);

}

public Any getAccountDetails (String name, AnyHolder myKamaradAccountDetails){

Any anyDD = orb.create_any();

KamaradAccountDetails tempKamaradAccDetails = (KamaradAccountDetails)hashtable.get(name);
KamaradAccountDetailsHelper.insert(anyDD, tempKamaradAccDetails);
myKamaradAccountDetails.value = anyDD;

return anyDD ;
}

}

Answer 1

int是32位整数类型，不允许前导零。您可以使用整数类型作为唯一ID，然后格式化以显示id

private static final DecimalFormat decimalFormat = new DecimalFormat("0000");
...

public String getUniqueIDText(){
    return decimalFormat.format(uid);
}

创建用户ID（0001,0002等）CORBA / Java

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