最近想写个东西，要使用分卷压缩，但是不想使用别的开源包，自己写了一个类来实现，其实使用

public void zip(String path) throws IOException {

File file = new File(path);

BufferedInputStream origin = null;

byte data[] = new byte[BUFFER];

FileInputStream fi = new FileInputStream(file);

origin = new BufferedInputStream(fi, BUFFER);

int count;

int offset = 0;

ZipOutputStream out = null;

while (true) {

if ((count = origin.read(data, 0, BUFFER)) != -1) {

if (offset % (MEGA) == 0) {

FileOutputStream dest = new FileOutputStream(file.getName()

+ ".(part" + (offset / (MEGA) + 1) + ").zip");

out = new ZipOutputStream(new BufferedOutputStream(dest));

ZipEntry entry = new ZipEntry(file.getName());

out.putNextEntry(entry);

}

out.write(data, 0, count);

offset += 1024;

if (offset % (MEGA) == 0 && offset != 0) {

out.close();

}

} else {

out.close();

break;

}

}

origin.close();

}

public void unzip(String[] path) throws IOException {

File file = new File(path[0].split("\\.")[0] + "."

+ path[0].split("\\.")[1]);

BufferedOutputStream out = new BufferedOutputStream(

new FileOutputStream(file));

byte data[] = new byte[BUFFER];

int offset = 0;

for (int i = 0; i < path.length; i++) {

ZipInputStream unzipfile = new ZipInputStream(new FileInputStream(

path[0]));

BufferedInputStream in = new BufferedInputStream(unzipfile);

ZipEntry entry = unzipfile.getNextEntry();

int count = 0;

while ((count = in.read(data, 0, BUFFER)) != -1) {

out.write(data, 0, count);

}

in.close();

}

out.close();

}

这里不要忘记了，压缩和解压都要使用entry来获得该文件的入口ZipEntry提供了一个功能很广泛的接口，允许我们获取设置zip文件内该特定项上的可利用的数据：名字压缩和未压缩的文件大小，日期校验和等