1.
java.lang.Object?
java.util.Dictionary?????
java.util.Hashtable?????????
java.util.Properties2.
??? InputStream propInput = ReportGenerator.class.getResourceAsStream(templatePropName);
????Properties prop = new Properties();
????prop.load(propInput);
??
3.和Hashtable操作一樣
String val= prop.getProperty(key)
prop.put("mail.smtp.debug", "true");