java 获取当前classpath的绝对路径

  /*
   * URI:绝对路径
   */
  System.out.println("当前类ReadTest.class文件的URI\n" + ReadTest.class.getResource(""));
  System.out.println("当前classpath的URI\n" + ReadTest.class.getResource("/"));
  System.out.println("当前classpath的URI\n" + ReadTest.class.getClassLoader().getResource(""));
  System.out.println("当前classpath的URI\n" + Thread.currentThread().getContextClassLoader().getResource(""));
  System.out.println("当前classpath的URI\n" + ClassLoader.getSystemResource(""));