java获取class的绝对路径

		System.out.println("1:" + Thread.currentThread().getContextClassLoader().getResource(""));
		System.out.println("2:" + IdcardClient.class.getClassLoader().getResource(""));
		System.out.println("3:" + ClassLoader.getSystemResource(""));
		System.out.println("4:" + IdcardClient.class.getResource(""));//IdcardClient.class文件所在路径
		System.out.println("5:" + IdcardClient.class.getResource("/")); // Class包所在路径，得到的是URL对象，用url.getPath()获取绝对路径String
		System.out.println("6:" + new File("/").getAbsolutePath());
		System.out.println("7:" + System.getProperty("user.dir"));
		System.out.println("8:" + System.getProperty("file.encoding"));//获取文件编码

 

获取文件内容

String url=IdcardClient.class.getResource("/idcheck-license.txt").getPath();
		System.out.println(url);
		File file = new File(url);
		String licensecode = FileUtils.readFileToString(file);
		System.out.println(licensecode);