如何將我從 class 獲得的值傳遞給另一個 class？

Question

目前我正在做一個程序，通過密鑰庫檢索 Azure 客戶端 ID 和秘密值。

下面是我和我的朋友為獲取值而制定的邏輯，我的問題是如何獲取我在static void main中獲得的值並傳遞給另一個 class 使用？ 我不知道如何重用我在另一個 class 中獲得的值。 請教我。

public class SecretReceiver {

private static SecretClient secretClient;

public static final String AZURE_CLIENT_ID="AZURE_CLIENT_ID";
public static final String AZURE_CLIENT_SECRET="AZURE_CLIENT_SECRET";
public static final String AZURE_TENANT_ID="AZURE_TENANT_ID";
public static final String AZURE_KEY_VAULT_NAME="AZURE_KEY_VAULT_NAME";

private static final String KEY_VAULT_URL = "https://%s.vault.azure.net";

private static void secretReceiverBuilder() {
    if (secretClient == null) {
        String keyVaultUrl = String.format(KEY_VAULT_URL, getProperty(AZURE_KEY_VAULT_NAME, ""));
        secretClient = new SecretClientBuilder()
                .vaultUrl(keyVaultUrl)
                .credential(new ClientSecretCredentialBuilder()
                        .clientId(getProperty(AZURE_CLIENT_ID, ""))
                        .clientSecret(getProperty(AZURE_CLIENT_SECRET, ""))
                        .tenantId(getProperty(AZURE_TENANT_ID, ""))
                        .build())
                .buildClient();
    }
}

public static void loadConfigFileAndSetEnv(String filePath) {
    try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(new File(filePath))))) {
        String line = null;
        while ((line = reader.readLine()) != null) {
            String[] split = line.split("=");
            if (split.length > 1) {
                String key = split[0].trim();
                String value = split[1].trim();
                if (key.contains(AZURE_CLIENT_ID)) {
                    System.setProperty(AZURE_CLIENT_ID, value);
                    continue;
                }
                if (key.contains(AZURE_CLIENT_SECRET)) {
                    System.setProperty(AZURE_CLIENT_SECRET, value);
                    continue;
                }
                if (key.contains(AZURE_TENANT_ID)) {
                    System.setProperty(AZURE_TENANT_ID, value);
                    continue;
                }
                if (key.contains(AZURE_KEY_VAULT_NAME)) {
                    System.setProperty(AZURE_KEY_VAULT_NAME, value);
                }
            }
        }
    } catch (Exception e) {
        log.error("Load file : {} error.", filePath, e);
    }
}

public static String getProperty(String key, String defaultValue) {
    String value = System.getProperty(key);
    if (StringUtils.isBlank(value)) {
        value = System.getenv(key);
    }
    return StringUtils.isBlank(value) ? defaultValue : value;
}

public static void main() throws Exception {
    //getUatAKV();
    loadConfigFileAndSetEnv("C:script\\key_vault.conf");
    String username = getSecretByKey("client-secret-name");
    String secret = getSecretByKey("client-secret");
    System.out.println("This is client id: " + username);
    System.out.println("This is client secret: " + secret);
}

public static String getSecretByKey(String name) {
    if (secretClient == null) {
        secretReceiverBuilder();
    }
    return secretClient.getSecret(name).getValue();
}

Answer 1

試試下面的代碼：

// Create static variable in a Class
public class Global {

    public static String USER_NAME ="";
    public static String SECRET ="";

}

// Set the value in your main function
String username = getSecretByKey("client-secret-name");
String secret = getSecretByKey("client-secret");
Global.USER_NAME = username;
Global.SECRET = secret;

// Get value in another class
System.out.println("This is client id: " + Global.USER_NAME);
System.out.println("This is client secret: " + Global.SECRET);