文件和字节数组的相互转换

package com.daxin.miaozhen;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * 
 * @author daxin
 * 
 * @email leodaxin@163com
 * 
 * @date 2017年9月14日 下午10:23:07
 * 
 */
public class MainByte {
    public static void main(String[] args) throws Exception {


        byte[] bytes = file2Bytes("C:\\Coding\\miaozhen\\src\\com\\daxin\\miaozhen\\StringDemo.java");
        byte2File(bytes);
        System.out.println(bytes.length);

    }

    public static byte[] file2Bytes(String path) throws Exception {
        File file = new File(path);
        BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
        ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);
        byte[] buffer = new byte[1024];
        int length = 0;
        while ((length = in.read(buffer)) != -1) {
            bos.write(buffer, 0, length);
        }

        byte[] data = bos.toByteArray();
        bos.close();
        bos = null;
        in.close();
        in = null;
        return data;
    }

    public static void byte2File(byte[] data) throws Exception {
        BufferedOutputStream bo = new BufferedOutputStream(new FileOutputStream("StringDemo1.java.txt"));
        bo.write(data);
        bo.flush();
        bo.close();
    }

}