获得当前所在项根路径的方法

 public static void main(String[] args){
  System.out.println(Thread.currentThread().getContextClassLoader().getResource(""));
  System.out.println(HibernateMappingManager.class.getClassLoader().getResource(""));
  System.out.println(ClassLoader.getSystemResource(""));
  System.out.println(HibernateMappingManager.class.getResource(""));
  System.out.println(HibernateMappingManager.class.getResource("/")); //Class文件所在路径
  System.out.println(new File("/").getAbsolutePath());
  System.out.println(System.getProperty("user.dir"));
  String rootSrc = System.getProperty("user.dir");
  String xmlSrc = rootSrc + "\\hrJava\\config\\hbmxml";
  System.out.println(xmlSrc);
 }