7-zip，A free software known to all community users，今天會拿出來推薦單就是針對它的其中一個功能而來。
就我個人的使用習慣而言，我對壓縮軟體的要求有兩個：支援自解分割檔、unpack exe（msi） file。先前發表ALZip那篇文章時，測試了幾套壓縮/解壓縮程式，在7-zip的部份是使用最新穩定版4.42，這個版本支援自解、也支援分割，但就是不支援自解分割，對exe封裝檔也無法解開；雖然ALZip也無法解開exe封裝，但卻能支援自解分割，在兩相權宜衡量之後，選擇了使用ALZip。
7-zip官方於8/3時發佈了4.52 beta版，在改版說明中，赫然看見「7-Zip now can unpack Compound files (msi, doc, …)」的字句，便立即下載試用，The results can indeed correctly unpack the exe package。
大家也許會好奇我為什麼會很想要這個功能，事實上這是拜各大軟體商所賜，很多軟體都會將安裝程式打包成一個執行檔，那麼你在執行它時，自然要先做一個unpack的動作，那麼它會unpack到哪裡呢？有時是C槽，有時是桌面，有時程式會自動判斷一個可用空間最多的硬碟磁區來存放。當然，如果程式在安裝結束後會幫我們清理乾淨，那他要存放到哪就不用我們操心了，但要命的是，有些軟體根本就不管這些暫存檔，裝完就把暫存檔丟在那裡，日積月累下來，硬碟就多了很多莫名的暫存目錄。在早期，These temporary files are by default located in the Windows or account temp directory，In this way，We only need to clean them up regularly，But now it's different，It could appear anywhere，This is really troublesome，You can't know whether the program has cleared the temporary files created during installation。Therefore，I have developed a habit，When I encounter this kind of packaged exe file，I manually unpack it first before proceeding with the installation。
The current 4.55 beta has already been released (9/5)，It also does not support self-extracting split files。Additionally，The official Chinese website seems to have not been updated for a long time，The last update date is still stuck on August 14 of last year，Which caused me to mistakenly think last time during testing that 7-zip has gradually stopped development，後來是在別的網站看到7-zip發佈beta版，Found the updated version only on the English page and SourceForge.net。
【相關連結】
- 7-Official zip webpage：7-zip.org、SourceForge.net
- Version update notes：Documentation
- 7-zip 4.55 beta：直接下载
[Further Reading]
役言堂:【免费软件】ALZip
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