ini文件如下：
driver=org.gjt.mm.mysql.Driver
database=jdbc:mysql://dbserver.mydomain.org/APIDB
user=my_user_name
password=my_secret_password
Properties p = new Properties(); // Empty properties
try { p.load(new FileInputStream(propfile)); } // Try to load props
catch (Exception e) {}
// Read values from Properties file
String driver = p.getProperty("driver");
String database = p.getProperty("database");
String user = p.getProperty("user", "");
String password = p.getProperty("password", "");
读取当前路径下的文件：
this.getClass().getResourceAsStream("a.ini")