Create Zip File In Windows and Extract Zip File In Linux
I had created a zip file (together with directory) under Win开发者_运维问答dows as follow (Code are picked from http://www.exampledepot.com/egs/java.util.zip/CreateZip.html) :
package sandbox;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
/**
*
* @author yan-cheng.cheok
*/
public class Main {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// These are the files to include in the ZIP file
String[] filenames = new String[]{"MyDirectory" + File.separator + "MyFile.txt"};
// Create a buffer for reading the files
byte[] buf = new byte[1024];
try {
// Create the ZIP file
String outFilename = "outfile.zip";
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename));
// Compress the files
for (int i=0; i<filenames.length; i++) {
FileInputStream in = new FileInputStream(filenames[i]);
// Add ZIP entry to output stream.
out.putNextEntry(new ZipEntry(filenames[i]));
// Transfer bytes from the file to the ZIP file
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
// Complete the entry
out.closeEntry();
in.close();
}
// Complete the ZIP file
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
The newly created zip file can be extracted without problem under Windows, by using http://www.exampledepot.com/egs/java.util.zip/GetZip.html
However, I realize if I extract the newly created zip file under Linux, using modified version of http://www.exampledepot.com/egs/java.util.zip/GetZip.html. The original version doesn't check for directory using zipEntry.isDirectory()).
public static boolean extractZipFile(File zipFilePath, boolean overwrite) {
InputStream inputStream = null;
ZipInputStream zipInputStream = null;
boolean status = true;
try {
inputStream = new FileInputStream(zipFilePath);
zipInputStream = new ZipInputStream(inputStream);
final byte[] data = new byte[1024];
while (true) {
ZipEntry zipEntry = null;
FileOutputStream outputStream = null;
try {
zipEntry = zipInputStream.getNextEntry();
if (zipEntry == null) break;
final String destination = Utils.getUserDataDirectory() + zipEntry.getName();
if (overwrite == false) {
if (Utils.isFileOrDirectoryExist(destination)) continue;
}
if (zipEntry.isDirectory())
{
Utils.createCompleteDirectoryHierarchyIfDoesNotExist(destination);
}
else
{
final File file = new File(destination);
// Ensure directory is there before we write the file.
Utils.createCompleteDirectoryHierarchyIfDoesNotExist(file.getParentFile());
int size = zipInputStream.read(data);
if (size > 0) {
outputStream = new FileOutputStream(destination);
do {
outputStream.write(data, 0, size);
size = zipInputStream.read(data);
} while(size >= 0);
}
}
}
catch (IOException exp) {
log.error(null, exp);
status = false;
break;
}
finally {
if (outputStream != null) {
try {
outputStream.close();
}
catch (IOException exp) {
log.error(null, exp);
break;
}
}
if (zipInputStream != null) {
try {
zipInputStream.closeEntry();
}
catch (IOException exp) {
log.error(null, exp);
break;
}
}
}
} // while(true)
}
catch (IOException exp) {
log.error(null, exp);
status = false;
}
finally {
if (zipInputStream != null) {
try {
zipInputStream.close();
} catch (IOException ex) {
log.error(null, ex);
}
}
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException ex) {
log.error(null, ex);
}
}
}
return status;
}
"MyDirectory\MyFile.txt" instead of MyFile.txt being placed under folder MyDirectory.
I try to solve the problem by changing the zip file creation code to
String[] filenames = new String[]{"MyDirectory" + "/" + "MyFile.txt"};
But, is this an eligible solution, by hard-coded the seperator? Will it work under Mac OS? (I do not have a Mac to try out)
Yes, your solution (though apparently inelegant) is the right way. The "/" should be used inside zipentry, not the local File.separator
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