Java(springboot) 讀取txt文本內容

public class TxtTest {
    private static final Logger logger = LoggerFactory.getLogger(TxtTest.class);
    public static String readTxt(File file) throws IOException {
        String s = "";
        InputStreamReader in = new InputStreamReader(new FileInputStream(file),"UTF-8");
        BufferedReader br = new BufferedReader(in);
        StringBuffer content = new StringBuffer();
        while ((s=br.readLine())!=null){
            content = content.append(s);
        }
        return content.toString();
    }

    public static void main(String[] args) {
        try {
　　　　　　　　//通過絕對路徑獲取文件
            String s1  = TxtTest.readTxt(new File("C:\\Users\\....\\du.txt"));
            logger.info(s1);

　　　　　　　　//spring boot中文件直接放在resources目錄下
            String s2 = TxtTest.readTxt(ResourceUtils.getFile("classpath:du.txt"));
            logger.info(s2);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}