求一个解压方法,用ZipInputStream的

Question

下面是压缩方法,求一个对压缩后的byte[]的解压方法public byte[] ZipPackFiles(string filenames)
    {
        ZipOutputStream zos = null;
        MemoryStream ms = null;
        try
        {
            ms = new MemoryStream();
            zos = new ZipOutputStream(ms);
            zos.SetLevel(9);
            FileStream fs = File.OpenRead(filenames);
            byte[] buffer = new byte[fs.Length];
            fs.Read(buffer, 0, buffer.Length);
            ZipEntry entry = new ZipEntry(filenames);
            entry.DateTime = DateTime.Now;
            entry.Size = fs.Length;
            fs.Close();
            zos.PutNextEntry(entry);
            zos.Write(buffer, 0, buffer.Length);
            zos.Finish();
            zos.Close();
            return ms.ToArray();
        }
        catch (Exception)
        {
            return null;
        }
    }

Answer 1

public bool UnZipFile(string zipFilePath, string unZipDir, out string err)
        {
            err = "";
            if (zipFilePath == string.Empty)
            {
                err = "压缩文件不能为空！";
                return false;
            }
            if (!File.Exists(zipFilePath))
            {
                err = "压缩文件不存在！";
                return false;
            }
            if (unZipDir == string.Empty)
                unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
            if (!unZipDir.EndsWith("\\"))
                unZipDir += "\\";
            if (!Directory.Exists(unZipDir))
                Directory.CreateDirectory(unZipDir);            try
            {
                using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
                {                    ZipEntry theEntry;
                    while ((theEntry = s.GetNextEntry()) != null)
                    {
                        string directoryName = Path.GetDirectoryName(theEntry.Name);
                        string fileName = Path.GetFileName(theEntry.Name);
                        if (directoryName.Length > 0)
                        {
                            Directory.CreateDirectory(unZipDir + directoryName);
                        }
                        if (!directoryName.EndsWith("\\"))
                            directoryName += "\\";
                        if (fileName != String.Empty)
                        {
                         using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
                            {                                int size = 2048;
                                byte[] data = new byte[2048];
                                while (true)
                                {
                                    size = s.Read(data, 0, data.Length);
                                    if (size > 0)
                                    {
                                        streamWriter.Write(data, 0, size);
                                    }
                                    else
                                    {
                                        break;
                                    }
                                }
                            }
                        }
                   }
                }
            }
            catch (Exception ex)
            {
                err = ex.Message;
                return false;
            }
            return true;
        }
压缩解压缩

Answer 2

你这是对压缩包的解压方法啊
我要的是对压缩后的byte[]的解压方法
上面我给出了把文件压缩成byte[]的方法,现在要的是对byte[]的解压缩

Answer 3

public static String decompress(byte[] compressed) { 
if(compressed == null) 
return null;    
ByteArrayOutputStream out = null; 
ByteArrayInputStream in = null; 
ZipInputStream zin = null; 
String decompressed; 
try { 
out = new ByteArrayOutputStream(); 
in = new ByteArrayInputStream(compressed); 
zin = new ZipInputStream(new ByteArrayInputStream(compressed));  ZipEntry entry = zin.getNextEntry(); 
// 50K
byte[] buffer = new byte[1024]; 
int offset = 0; 
System.out.println("getnext=="+zin.getNextEntry());
System.out.println("offset="+zin.read(buffer));
while((offset = zin.read(buffer)) != -1) { 
out.write(buffer, 0, offset); 
} 
decompressed = out.toString(); 
} catch (IOException e) { 
decompressed = null; 
} finally { 
if(zin != null) { 
try {zin.close();} catch(IOException e) {} 
} 
if(in != null) { 
try {in.close();} catch(IOException e) {} 
} 
if(out != null) { 
try {out.close();} catch(IOException e) {} 
} 
}    
return decompressed; 
}