Java 中 file 读写 与 Zip 压缩解压

以byte[]读文件

    public static byte[] file2byte(String path)
    {
        try {
            FileInputStream in =new FileInputStream(new File(path));
            //当文件没有结束时，每次读取一个字节显示
            byte[] data=new byte[in.available()];
            in.read(data);
            in.close();
            return data;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

byte[]写文件

    public static void byte2file(String path,byte[] data) {
        try {
            FileOutputStream outputStream  =new FileOutputStream(new File(path));
            outputStream.write(data);
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

zip解压byte[]

    public static byte[] unZip(byte[] data) {
        byte[] b = null;
        try {
            ByteArrayInputStream bis = new ByteArrayInputStream(data);
            ZipInputStream zip = new ZipInputStream(bis);
            while (zip.getNextEntry() != null) {
                byte[] buf = new byte[1024];
                int num = -1;
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                while ((num = zip.read(buf, 0, buf.length)) != -1) {
                    baos.write(buf, 0, num);
                }
                b = baos.toByteArray();
                baos.flush();
                baos.close();
            }
            zip.close();
            bis.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return b;
    }

zip压缩byte[]

    public static byte[] zip(byte[] data) {
        byte[] b = null;
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ZipOutputStream zip = new ZipOutputStream(bos);
            ZipEntry entry = new ZipEntry("zip");
            entry.setSize(data.length);
            zip.putNextEntry(entry);
            zip.write(data);
            zip.closeEntry();
            zip.close();
            b = bos.toByteArray();
            bos.close();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return b;
    }