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There is a newer version: 1.1.2-RELEASE

package hope.kola.contract.utils;

import java.io.*;
import java.nio.charset.StandardCharsets;

public class FileUtils {
  public static final File WORKING_DIR = new File("").getAbsoluteFile();

  public static byte[] toBytes(String string) {
    if (string == null) {
      return null;
    }
    return string.getBytes(StandardCharsets.UTF_8);
  }

  public static String toString(InputStream is) {
    try {
      return toByteStream(is).toString(StandardCharsets.UTF_8);
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  public static String toString(byte[] bytes) {
    if (bytes == null) {
      return null;
    }
    return new String(bytes, StandardCharsets.UTF_8);
  }

  public static byte[] toBytes(File file) {
    try {
      return toBytes(new FileInputStream(file));
    } catch (Exception e) {
      throw new RuntimeException(e);
    }
  }

  public static byte[] toBytes(InputStream is) {
    return toByteStream(is).toByteArray();
  }

  private static ByteArrayOutputStream toByteStream(InputStream is) {
    ByteArrayOutputStream result = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    int length;
    try {
      while ((length = is.read(buffer)) != -1) {
        result.write(buffer, 0, length);
      }
      return result;
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  public static void writeToFile(File file, String json) {
    writeToFile(file, json.getBytes(StandardCharsets.UTF_8));
  }

  public static void writeToFile(File file, byte[] data) {
    try {
      File parent = file.getAbsoluteFile().getParentFile();
      if (!parent.exists()) {
        parent.mkdirs();
      }
      // try with resources, so will be closed automatically
      try (FileOutputStream fos = new FileOutputStream(file)) {
        fos.write(data);
      }
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }
}