我正在通過從屬性文件獲取數據來讀取電子郵件消息。我正在使用計時器計劃在一段時間后定期讀取新消息。我該如何執行此操作？TimerSchedule.javapublic class TimeScheduler{ public static void main(String[] args) { Timer timer = new Timer(); GmailConfiguration gmailConfiguration = new GmailConfiguration(); TimerTask timerTask = new TimerTask() { @Override public void run() { gmailConfiguration.configure(); } }; timer.scheduleAtFixedRate(timerTask, 500, 30000); }}我正在從 GmailConfiguration.java 中的屬性文件獲取數據這是我的 GmailConfiguration.javapublic class GmailConfiguration{ private static final Logger LOGGER = LoggerFactory.getLogger(GmailConfiguration.class); public void configure() { JSONParser parser = new JSONParser(); try { String propertyFileName = "emailServer.properties"; InputStream inputStream = getClass().getClassLoader().getResourceAsStream(propertyFileName); JSONObject jsonObject = (JSONObject) parser.parse(new InputStreamReader(inputStream, StandardCharsets.UTF_8)); JSONArray jadata = (JSONArray) jsonObject.get("Servers"); int len = jadata.size(); AccessMailMessages readGmail = new AccessMailMessages(); JSONObject server; String name; String host; String username; String password; int port; String folderName; for (int i = 0; i < len; i++)
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Configuration將類與類分開EmailReceiver：
// Utilizes "Singleton" pattern
class GmailConfiguration {
private static final GmailConfiguration INSTANCE = new GmailConfiguration();
boolean isConfigured;
String host;
String port;
//etc.
public void configure() {
if (!isConfigured) {
// read in the properties, populate host/port etc.
isConfigured = true;
}
// when called for the second time, reading won't happen
}
}
然后，至于接收電子郵件：
class GmailReceiver {
public void receive() {
AccessMailMessages readGmail = new AccessMailMessages();
GmailConfiguration config = GmailConfiguration.INSTANCE;
config.configure();
readGmail.recieveGmail(config.getName(),
config.getHost(),
config.getPort() /* etc */);
}
}
并確保只安排GmailReceiver
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