ZipInputStream的问题 散200分~~~~

解压zip文件 不含中文

但是 用ZipInputStream解压出来的文件跟源文件比较有差异
(表现为 某些地方会添加0x20 即空格 文件尾缺少 原以为是缓冲的问题 不停的flush也没用)

使用ZipFile的正确

想问问是什么原因 那些0x20是怎么多出来的

代码如下

使用ZipInputStream解压 (解压不正确)

public class ZipTest2
{
private static int length = 9;
public static void main(String[] args) throws IOException
{
File f1 = new File("C:\\test.zip");

ZipInputStream zin = new ZipInputStream(new FileInputStream(f1));

ZipEntry zinentry;

while((zinentry = zin.getNextEntry()) != null)
{
File f = new File("C:\\" + zinentry.getName());
if(!f.exists())
{
if(zinentry.isDirectory())
f.mkdirs();
else
f.createNewFile();
}
if(zinentry.isDirectory())
{
zin.closeEntry();
continue;
}
FileOutputStream output = new FileOutputStream(f);
long size = zinentry.getSize();
while(size >= length)
{
System.out.println(size);
byte[] bytes = new byte[length];
zin.read(bytes,0 , length);
output.write(bytes, 0, length);
// output.flush();
size -= length;
}

if(size > 0 && size < length)
{
System.out.println(size);
byte[] bytes = new byte[(int)size];
zin.read(bytes, 0, (int)size);
output.write(bytes, 0, (int)size);
// output.flush();
}
output.close();

zin.closeEntry();

}

zin.close();
}
}




使用ZipFile解压 (解压正确)

public class ZipTest3
{
private static int length = 2048;

public static void main(String[] args) throws IOException
{
File f = new File("C:\\test.zip");
ZipFile zipf = new ZipFile(f);

Enumeration zipEntrys = zipf.entries();

while (zipEntrys.hasMoreElements())
{
ZipEntry zipEntry = (ZipEntry) zipEntrys.nextElement();
File tempf = new File("C:\\" + zipEntry.getName());

if (!tempf.exists())
{
if (zipEntry.isDirectory())
tempf.mkdirs();
else
tempf.createNewFile();
}

InputStream input = zipf.getInputStream(zipEntry);
FileOutputStream output = new FileOutputStream(tempf);
long size = zipEntry.getSize();

while(size >= length)
{
byte[] bytes = new byte[length];
input.read(bytes);
output.write(bytes);
// output.flush();

size -= length;
}

if(size > 0 && size < length)
{
byte[] bytes = new byte[(int)size];
input.read(bytes);
output.write(bytes);
// output.flush();
}
input.close();
output.close();

}

zipf.close();
}
}