JAVA如何获取工程下的文件

public static void main(String[] args) {    WordTest wordTest = new WordTest();    wordTest.getFile();    System.out.println(WordTest.class.getResource(""));    System.out.println(WordTest.class.getResource("/"));  }

public void testFile() {   System.out.println(getClass().getClassLoader().getResource(""));   System.out.println(getClass().getClassLoader().getResource("/"));    return ;  }