apache : 文件压缩/解压缩包 Commons Compress

http://www.oschina.net/p/commons+compress

Commons Compress 用以实现将文件压缩或解压成 tar、zip、bzip2 等格式。

下面代码将文件压缩成zip格式：

ArArchiveEntry entry = new ArArchiveEntry(name, size);
arOutput.putArchiveEntry(entry);
arOutput.write(contentOfEntry);
arOutput.closeArchiveEntry();

Zip文件的解压缩：

ArArchiveEntry entry = (ArArchiveEntry) arInput.getNextEntry();
byte[] content = new byte[entry.getSize()];
LOOP UNTIL entry.getSize() HAS BEEN READ {
    arInput.read(content, offset, content.length - offset);
}