我需要在Android上解压一个2.5MB的.zip文件(包含1087个文件-*.html,*.css和*.db),我已经使用了java.util.zip,它可以正常工作,但我需要提高性能,解压过程持续1.10分钟,我需要缩短这个时间。
我已经按照一些建议来提高性能,例如:
- 使用BufferedInputStream、FileOutputStream和BufferedOutputStream。
- 分块读取zip文件:
byte data[] = new byte[2048]; while ((counter = bisMediaFile.read(data, 0, 2048)) != -1) { bosMediaFile.write(data, 0, counter); }
有没有办法改进我的代码?我正在寻找第三方zip程序来进行编程,例如我尝试了7ZipJBinding,但似乎Android不支持它,因为我引用了sevenzipjbinding.jar和sevenzipjbinding-AllPlatforms.jar,但我收到了一个错误:“在sevenzipjbinding-AllPlatforms中检测到本地库”。在7zip主页上有MAC、Windows、Linux版本,但我没有看到任何关于Android的信息。
请问您能推荐其他库来在Android上解压文件吗?
这是我的全部代码:
public static void processZipFile(String strBinaryPath,String strExtractPath, String strDestinationDBPath) throws Exception
{
ZipFile zipInFile = null;
try
{
if (strExtractPath != null)
{
zipInFile = new ZipFile(strBinaryPath);
for (Enumeration<? extends ZipEntry> entries = zipInFile.entries(); entries.hasMoreElements();)
{
ZipEntry zipMediaEntry = entries.nextElement();
if (zipMediaEntry.isDirectory())
{
File mediaDir = new File(String.format("%s\\%s", strExtractPath, zipMediaEntry.getName()));
mediaDir.mkdirs();
}
else
{
BufferedInputStream bisMediaFile = null;
FileOutputStream fosMediaFile = null;
BufferedOutputStream bosMediaFile = null;
try
{
String strFileName = String.format("%s\\%s", strExtractPath, zipMediaEntry.getName());
File uncompressDir = new File(strFileName).getParentFile();
uncompressDir.mkdirs();
//if is a database file, extract to other path : android.movinginteractive.com/databases
if(strFileName.contains(".db"))
strFileName = String.format("%s\\%s", strDestinationDBPath, ExtractDBName(zipMediaEntry.getName()));
bisMediaFile = new BufferedInputStream(zipInFile.getInputStream(zipMediaEntry));
fosMediaFile = new FileOutputStream(strFileName);
bosMediaFile = new BufferedOutputStream(fosMediaFile);
int counter;
byte data[] = new byte[2048];
while ((counter = bisMediaFile.read(data, 0, 2048)) != -1)
{
bosMediaFile.write(data, 0, counter);
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (bosMediaFile != null)
{
bosMediaFile.flush();
bosMediaFile.close();
}
if (bisMediaFile != null)
bisMediaFile.close();
}
}
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (zipInFile != null)
zipInFile.close();
File flZipToDelete = new File(strBinaryPath);
if(flZipToDelete.exists())
flZipToDelete.delete();
}
}