Unity之Zip解压

using UnityEngine;  
using System.Collections;  
using System;  
using System.IO;  
using ICSharpCode.SharpZipLib.Checksums;  
using ICSharpCode.SharpZipLib.Zip;  
public class MangeZip : MonoBehaviour  
{  
    string sourcesPath = "";  
    string targetPath = "";  
    string filename = "test.zip";  
    ZipUtils zu;  
    // Use this for initialization  
    void Start()  
    {  
        sourcesPath = Application.dataPath   "/Zip";  
        targetPath = Application.dataPath   "/CompressZip";  
        Debug.Log("sourcesPaht is:"   sourcesPath   "   "   targetPath);  
        StartCoroutine(StartUnZip());  
    }  
    IEnumerator StartUnZip()  
    {  
        string uri = "file:///"   sourcesPath   "/"   filename;  
        WWW www = new WWW(uri);  
        Debug.Log("uri is:"   uri);  
        yield return www;  
        if (www.error != null)  
        {  
            Debug.Log("loading is faile");  
        }  
        if (www.isDone)  
        {  
            Debug.Log("www is success");  
        }  
        //如果路径不存在 则创建  
        if (!Directory.Exists(targetPath))  
        {  
            Directory.CreateDirectory(targetPath);  
        }  
        //把当前的压缩包写入到指定的路径下  
        File.WriteAllBytes(targetPath   "/"   filename, www.bytes);  
        //ICSharpCode.SharpZipLib.Zip.ZipConstants.DefaultCodePage = System.Text.Encoding.UTF8.CodePage;  
        StartCoroutine(UnzipWithPath(targetPath   "/"   filename));  
    }  
    private int totalCount;  
    private int doneCount;  
    private int indicatorStep = 1;  
    public IEnumerator UnzipWithPath(string path)  
    {  
        Debug.Log("paht is:"   path);  
        //这是根目录的路径  
        string dirPath = path.Substring(0, path.LastIndexOf('/'));  
        Debug.Log("dirpath is:"   dirPath);  
        //ZipEntry：文件条目 就是该目录下所有的文件列表(也就是所有文件的路径)  
        ZipEntry zip = null;  
        //输入的所有的文件流都是存储在这里面的  
        ZipInputStream zipInStream = null;  
        //读取文件流到zipInputStream  
        zipInStream = new ZipInputStream(File.OpenRead(path));  
        //循环读取Zip目录下的所有文件  
        while ((zip = zipInStream.GetNextEntry()) != null)  
        {  
            Debug.Log("name is:"   zip.Name   " zipStream "   zipInStream);  
            UnzipFile(zip, zipInStream, dirPath);  
            doneCount  ;  
            if (doneCount % indicatorStep == 0)  
            {  
                yield return new WaitForEndOfFrame();  
            }  
        }  
        try  
        {  
            zipInStream.Close();  
        }  
        catch (Exception ex)  
        {  
            Debug.Log("UnZip Error");  
            throw ex;  
        }  
        Debug.Log("解压完成："   path);  
    }  
    static void UnzipFile(ZipEntry zip, ZipInputStream zipInStream, string dirPath)  
    {  
        try  
        {  
            //文件名不为空  
            if (!string.IsNullOrEmpty(zip.Name))  
            {  
                string filePath = dirPath;  
                filePath  = ("/"   zip.Name);  
                //如果是一个新的文件路径　这里需要创建这个文件路径  
                if (IsDirectory(filePath))  
                {  
                    Debug.Log("Create  file paht "   filePath);  
                    if (!Directory.Exists(filePath))  
                    {  
                        Directory.CreateDirectory(filePath);  
                    }  
                }  
                else  
                {  
                    FileStream fs = null;  
                    //当前文件夹下有该文件  删掉  重新创建  
                    if (File.Exists(filePath))  
                    {  
                        File.Delete(filePath);  
                    }  
                    fs = File.Create(filePath);  
                    int size = 2048;  
                    byte[] data = new byte[2048];  
                    //每次读取2MB  直到把这个内容读完  
                    while (true)  
                    {  
                        size = zipInStream.Read(data, 0, data.Length);  
                        //小于0， 也就读完了当前的流  
                        if (size > 0)  
                        {  
                            fs.Write(data, 0, size);  
                        }  
                        else  
                        {  
                            break;  
                        }  
                    }  
                    fs.Close();  
                }  
            }  
        }  
        catch (Exception e)  
        {  
            throw new Exception();  
        }  
    }  
    /// <summary>  
    /// 判断是否是目录文件  
    /// </summary>  
    /// <param name="path"></param>  
    /// <returns></returns>  
    static bool IsDirectory(string path)  
    {  
        if (path[path.Length - 1] == '/')  
        {  
            return true;  
        }  
        return false;  
    }  
}