package com.nova.sankuai.domain.api.yinsheng;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * @类名称：TextFileHelper
 * @类描述：读取文件
 * @作者：zhanggy
 * @日期：2021年8月11日
 */
public final class TextFileHelper {

	private TextFileHelper() {
	}

	/**
	 * 读文件
	 * @param file 文件路径
	 * @return 文件内容
	 */
	public static byte[] readFile(String file) throws IOException {
		int offset = 0;
		try (FileInputStream in = new FileInputStream(file)) {
			byte[] out = new byte[in.available()];

			if (out.length < offset + in.available()) {
				throw new IOException("Illegal Argument: filepath");
			}

			byte[] buffer = new byte[1024];
			int numRead;
			while ((numRead = in.read(buffer, 0, buffer.length)) >= 0) {
				System.arraycopy(buffer, 0, out, offset, numRead);
				offset += numRead;
			}
			return out;
		}
	}

	/**
	 * 写文件
	 */
	public static void writeFile(String filePath, byte[] data) throws IOException {
		try (FileOutputStream out = new FileOutputStream(filePath)) {
			out.write(data, 0, data.length);
		}
	}

}