JAVA怎样获取工程下的文件

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 ;
  }