SonarLint Try-with-resources should be used

SonarLint Try-with-resources should be used

在文件流中，我们在使用完这些流通道都需要将其关闭，并在该过程中捕获异常。通常我们的代码写法是下面这样

public static File byteToFile(byte[] buf, String filePath, String fileName) {
        BufferedOutputStream bos = null;
        FileOutputStream fos = null;
        File file = null;
        try {
            File dir = new File(filePath);
            if (!dir.exists()) {
                dir.mkdirs();
            }
            file = new File(filePath + "/" + fileName);
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            bos.write(buf);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bos != null) {
                try {
                    bos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return file;
    }

public static File byteToFile(byte[] buf, String filePath, String fileName) {
        File file = null;
        try (FileOutputStream fos = new FileOutputStream(file);
             BufferedOutputStream bos = new BufferedOutputStream(fos)) {
            File dir = new File(filePath);
            if (!dir.exists()) {
                dir.mkdirs();
            }
            file = new File(filePath + "/" + fileName);
            bos.write(buf);
        } catch (Exception e) {
            log.error("{}", e);
        }
        return file;
    }

代码更加简洁明了。