读取Resource 相对路径

        File directory = new File("src/main/resources/static/pic");
        String courseFile = directory.getCanonicalPath();
        System.out.println(courseFile);

    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.yml</include>
          <include>**/*.xml</include>
          <include>**/*.xls</include>
          <include>**/*.png</include>
          <include>**/*.jpg</include>
        </includes>
      </resource>
    </resources>