在這里我用了一個線程池，線程池參數接收一個帶有object參數的，無返回值的委托 ，下載用到的核心代碼，網上拷貝的，他的核心就是發起一個web請求，然后得到請求的響應，讀取響應的流

剩下的都是常見的IO操作

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由于線程池接參數的委托，接收一個object參數。所以，我把請求地址和本地存放地址以及名字，封裝了一個類，用來傳參

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?這是下載工具代碼，如下

using System; using System.Collections; using System.Collections.Generic; using System.IO; using System.Net; using UnityEngine;public class DownLoaderEnum {public string url;public string path;public DownLoaderEnum(string URL, string PATH){url = URL;path = PATH;} }public class HttpDownload {/// <summary>/// http下載文件/// </summary>/// <param name="url">下載文件地址</param>/// <param name="path">文件存放地址，包含文件名</param>/// <returns></returns>public void HttpDownloader(object down){if (!Directory.Exists((down as DownLoaderEnum).path))Directory.CreateDirectory((down as DownLoaderEnum).path);string tempPath = System.IO.Path.GetDirectoryName((down as DownLoaderEnum).path) + @"\temp";System.IO.Directory.CreateDirectory(tempPath); //創建臨時文件目錄string tempFile = tempPath + @"\" + System.IO.Path.GetFileName((down as DownLoaderEnum).path) + ".temp"; //臨時文件if (System.IO.File.Exists(tempFile)){System.IO.File.Delete(tempFile); //存在則刪除}try{FileStream fs = new FileStream(tempFile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);// 設置參數HttpWebRequest request = WebRequest.Create((down as DownLoaderEnum).url) as HttpWebRequest;//發送請求并獲取相應回應數據HttpWebResponse response = request.GetResponse() as HttpWebResponse;//直到request.GetResponse()程序才開始向目標網頁發送Post請求Stream responseStream = response.GetResponseStream();//創建本地文件寫入流//Stream stream = new FileStream(tempFile, FileMode.Create);byte[] bArr = new byte[1024];int size = responseStream.Read(bArr, 0, (int)bArr.Length);while (size > 0){//stream.Write(bArr, 0, size);fs.Write(bArr, 0, size);size = responseStream.Read(bArr, 0, (int)bArr.Length);}//stream.Close();fs.Close();responseStream.Close();string suffixName = (down as DownLoaderEnum).url;int su = suffixName.LastIndexOf('/');suffixName = (down as DownLoaderEnum).path+suffixName.Substring(su);// Debug.LogError(suffixName);System.IO.File.Move(tempFile, suffixName);// return true;Debug.LogError("下載完成");}catch (Exception ex){Debug.LogError("錯誤==>>" + ex.Message);//return false;}} }

　　

　　這是測試代碼

using System; using System.Collections; using System.Collections.Generic; using System.IO; using System.Threading; using UnityEngine;public class NewBehaviourScript : MonoBehaviour {public string url = "http://dl172.80s.im:920/1802/[比得兔]劇場預告片/[比得兔]劇場預告片_hd.mp4";// Use this for initializationstring path = "";HttpDownload download = new HttpDownload();DownLoaderEnum down;private void Awake(){path = Application.streamingAssetsPath;//DirectoryInfo directory = new DirectoryInfo(path);//if (directory.Exists)// directory.Create();//Debug.LogError(path);}// Use this for initializationvoid Start(){ThreadPool.SetMaxThreads(5, 5);down = new DownLoaderEnum(url, path);//請求url，存放地址，存放文件名}// Update is called once per framevoid Update(){if (Input.GetKeyDown(KeyCode.Space)){ThreadPool.QueueUserWorkItem(download.HttpDownloader, down);}} }

　　

　　

?可以看到，已經下載完成

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轉載于:https://www.cnblogs.com/lzy575566/p/8458867.html

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