如何使用 LZMA SDK 在 Java 中压缩/解压 [英] How to use LZMA SDK to compress/decompress in Java

问题描述

http://www.7-zip.org/sdk.html本站提供了一个用于压缩/解压文件的LZMA SDK，我想试一试，但我迷路了.

http://www.7-zip.org/sdk.html This site provide a LZMA SDK for compress/decompress files, I would like to give it a shot but I am lost.

有人有这方面的经验吗?还是教程?谢谢.

Anyone got experience on this? Or a tutorial? Thanks.

推荐答案

简短回答:不要

7zip sdk 很旧而且没有维护，它只是围绕 C++ 库的 JNI 包装器.现代 JVM (1.7+) 上的纯 Java 实现与 C++ 实现一样快，并且依赖性和可移植性问题更少.

The 7zip sdk is old and unmaintained and it's just a JNI wrapper around the C++ library. A pure Java implementation on a modern JVM (1.7+) is as fast as a C++ one and has less dependecies and portability issues.

看看 http://tukaani.org/xz/java.html

XZ 是基于 LZMA2(LZMA 的改进版)的文件格式

XZ is a file format based on LZMA2 (an improved version of LZMA)

发明 XZ 格式的人构建了 XZ 存档压缩/提取算法的纯 Java 实现

The guys that invented the XZ format build a pure java implementation of the XZ archive compression / extraction algorithms

XZ 文件格式旨在仅存储 1 个文件.因此，您需要先将源文件夹压缩/tar 到一个未压缩的文件中.

The XZ file format is designed to store 1 file only. Thus you need to zip/tar the source folder(s) into a single uncompressed file first.

使用 java 库就这么简单:

Using the java library is as easy as this:

FileInputStream inFile = new FileInputStream("src.tar");
FileOutputStream outfile = new FileOutputStream("src.tar.xz");

LZMA2Options options = new LZMA2Options();

options.setPreset(7); // play with this number: 6 is default but 7 works better for mid sized archives ( > 8mb)

XZOutputStream out = new XZOutputStream(outfile, options);

byte[] buf = new byte[8192];
int size;
while ((size = inFile.read(buf)) != -1)
   out.write(buf, 0, size);

out.finish();

这篇关于如何使用 LZMA SDK 在 Java 中压缩/解压的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！