String s = FileUtils.readFileToString(new File("src/main/resources/holiday.txt"), "utf-8");

    /**
     * 通過ClassPathResource類獲取，建議SpringBoot中使用
     * springboot項(xiàng)目中需要使用此種方法，因?yàn)閖ar包中沒有一個(gè)實(shí)際的路徑存放文件
     *
     * @param fileName
     * @throws IOException
     */
    public void function6(String fileName) throws IOException {
        ClassPathResource classPathResource = new ClassPathResource(fileName);
        InputStream inputStream = classPathResource.getInputStream();
        getFileContent(inputStream);
    }

String s = FileUtils.readFileToString(new File("src/main/resources/holiday.txt"), "utf-8");

    /**
     * Java讀取txt文件的內(nèi)容
     *
     * @param fileName resources目錄下文件名稱(無需帶目錄)
     * @return 將每行作為一個(gè)單位放到list中
     */
    public static List<String> readTxtFile(String fileName) {
        List<String> listContent = new ArrayList<>();
        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader br = null;
        String encoding = "utf-8";
        try {
            Resource resource = new ClassPathResource(fileName);
            is = resource.getInputStream();
            isr = new InputStreamReader(is, encoding);
            br = new BufferedReader(isr);
            String lineTxt = null;
            while ((lineTxt = br.readLine()) != null) {
                listContent.add(lineTxt);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                br.close();
                isr.close();
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return listContent;
    }

  //方式二 利用FileUtils將ClassPathResource.getInputStream 得到的輸入流復(fù)制到臨時(shí)文件中
  Resource resource = new ClassPathResource("holiday.txt");
  InputStream inputStream = resource.getInputStream();
  File tempFile = File.createTempFile("temp", ".txt");
  FileUtils.copyInputStreamToFile(inputStream, tempFile);
  
  String s = FileUtils.readFileToString(tempFile, StandardCharsets.UTF_8);

	<!-- 資源拷貝插件，實(shí)現(xiàn)在打包時(shí)自動(dòng)拷貝java目錄下以及resources目錄下的xml的配置文件 -->
		<resources>
			<resource>
				<directory>src/main/java</directory>
				<includes>
					<include>**/*.xml</include>
				</includes>
			</resource>
			<resource>
				<directory>src/main/resources</directory>
				<includes>
					<include>**/*.xml</include>
					<include>**/*.properties</include>
					<include>**/banner.txt</include>
				</includes>
			</resource>
		</resources>

	<!-- 資源拷貝插件，實(shí)現(xiàn)在打包時(shí)自動(dòng)拷貝java目錄下以及resources目錄下的xml的配置文件 -->
		<resources>
			<resource>
				<directory>src/main/java</directory>
				<includes>
					<include>**/*.xml</include>
				</includes>
			</resource>
			<resource>
				<directory>src/main/resources</directory>
				<includes>
					<include>**/*.xml</include>
					<include>**/*.properties</include>
					<include>**/*.txt</include>
				</includes>
			</resource>
		</resources>