自動更新系統的開發
摘要：在Internet迅猛發展的今天，自動更新系統有着極其重要的作用。隨便看看我們身邊的'產品，幾乎都有自動更新這個系統，例如Windows Update，殺毒軟件的自動升級，網絡遊戲的經常更新等等。這是我們最爲常見的自動更新。所以從各個方面看來，自動更新系統都有着不可估量的價值。
本文首先對整個系統作了介紹，然後重點介紹了了檔案從不同服務器上下載的方法以及檔案下載技術和檔案下載的具體實現方法。在各種網絡情況下系統如何選擇FTP、HTTP、UDP等網絡協議進行下載。並在下載過程中，根據網絡的實現情況用不同的技術（如多線程技術、傳送壓縮檔案、實現斷點傳送等）進行自動下載檔案。
關鍵詞 自動更新；網絡協議；多線程；斷點傳送
The Development of Automatic Updating Controls
ABSTRACT：In Internet swift and violent development today, renews the system to have automatically the extremely vital role. Has a look we side product casually, nearly all has renews this system automatically, for example Windows Update, anti-virus software automatic promotion, network game frequent renewal and so on. This is we most common automatic renewal. Therefore looked like from each aspect, renews the system all to have automatically the inestimable value.
This article first has made the introduction to the overall system, then introduced with emphasis the document the method as well as the document downloading technology and document downloading which downloaded from the different server concrete realization method. Does the system choose network protocols and so on the FTP, HTTP, UDP how in each kind of network situation carries on downloading. And in the downloading process, according to the network realization situation with the different technology (for example multi-thread technology, transmission compressed file, realizes break point transmission and so on) to carry on the automatic downloading document.
Key words: Automatic renewal; Network protocol; Multithreading; Break point transmission