Class ReadFileUtils

src/main/java/top/misec/utils/ReadFileUtils.java:17–65

工具类通过流的方式读取文件. @author Junzhou Liu @since 2020/10/17 19:31

 * @since 2020/10/17 19:31
 */
@Slf4j
public class ReadFileUtils {

    /**
     * 读取指定路径的文件。
     *
     * @return fileContentStr
     */
    public static String readFile(String filePath) {
        String fileContentStr = null;
        try {
            InputStream inputStream = new FileInputStream(filePath);
            int size = inputStream.available();
            byte[] buffer = new byte[size];
            inputStream.read(buffer);
            inputStream.close();
            fileContentStr = new String(buffer, StandardCharsets.UTF_8);
        } catch (FileNotFoundException e) {
            log.debug("file not found", e);
        } catch (IOException e) {
            log.warn("", e);
        }
        return fileContentStr;
    }


    /**
     * 从resource读取版本文件.
     *
     * @param fileName 文件名.
     * @return fileContentStr
     */
    public static String loadJsonFromAsset(String fileName) {
        String fileContentStr = null;
        try {
            InputStream is = ReadFileUtils.class.getClassLoader().getResourceAsStream(fileName);
            assert is != null;
            int size = is.available();
            byte[] buffer = new byte[size];
            is.read(buffer);
            is.close();
            fileContentStr = new String(buffer, StandardCharsets.UTF_8);
        } catch (IOException e) {
            log.warn("", e);
        }
        return fileContentStr;
    }

}