プロパティファイルを読み込む

private static Properties readProperties() {
  Properties prop = new Properties();
  InputStream is = null;
  StringBuffer sb = new StringBuffer();
  try {
    ClassLoader cl = XXXXX.class.getClassLoader();
    sb.append(((XXXXX.class).getPackage()).getName());
    sb.append(System.getProperty("file.separator"));
    sb.append("hoge.properties");
    URL url = cl.getResource(new String(sb));
    if (url != null) {
      URLConnection urlConn = url.openConnection();
      if (urlConn != null) {
        urlConn.setUseCaches(false);
        is = urlConn.getInputStream();
      }
    }
    prop.load(is);
  } catch (Exception e) {
    e.printStackTrace();
  }
  return prop;
}

※ XXXXX はクラス名