Java by API/java.util.zip/ZipEntry
Содержание
new ZipEntry(String name)
<source lang="java">
import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class Main {
public static void main(String[] argv) throws Exception {
String[] filenames = new String[] { "filename1", "filename2" };
byte[] buf = new byte[1024];
String outFilename = "outfile.zip";
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename));
for (int i = 0; i < filenames.length; i++) {
FileInputStream in = new FileInputStream(filenames[i]);
out.putNextEntry(new ZipEntry(filenames[i]));
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
out.closeEntry();
in.close();
}
out.close();
}
}
</source>
ZipEntry.DEFLATED
<source lang="java">
import java.util.Date; import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class Main {
public static void main(String[] args) throws Exception {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
Date lastModified = new Date(ze.getTime());
long uncompressedSize = ze.getSize();
long compressedSize = ze.getCompressedSize();
int method = ze.getMethod();
if (method == ZipEntry.STORED) {
System.out.println(name + " was stored at " + lastModified);
System.out.println("with a size of " + uncompressedSize + " bytes");
} else if (method == ZipEntry.DEFLATED) {
System.out.println(name + " was deflated at " + lastModified);
System.out.println("from " + uncompressedSize + " bytes to " + compressedSize
+ " bytes, a savings of " + (100.0 - 100.0 * compressedSize / uncompressedSize) + "%");
} else {
System.out.println(name + " was compressed at " + lastModified);
System.out.println("from " + uncompressedSize + " bytes to " + compressedSize
+ " bytes, a savings of " + (100.0 - 100.0 * compressedSize / uncompressedSize) + "%");
}
}
}
}
</source>
ZipEntry: getComment()
<source lang="java">
import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class Main {
public static void main(String[] args) throws Exception {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
long crc = ze.getCrc();
System.out.println("Its CRC is " + crc);
String comment = ze.getComment();
if (comment != null && !comment.equals("")) {
System.out.println(comment);
}
if (ze.isDirectory()) {
System.out.println(name + " is a directory");
}
}
}
}
</source>
ZipEntry: getCompressedSize()
<source lang="java">
import java.io.IOException; import java.util.Date; import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class Main {
public static void main(String[] args) {
try {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
Date lastModified = new Date(ze.getTime());
long uncompressedSize = ze.getSize();
long compressedSize = ze.getCompressedSize();
System.out.println(name);
System.out.println(lastModified);
System.out.println(uncompressedSize);
System.out.println(compressedSize);
}
} catch (IOException ex) {
System.err.println(ex);
}
}
}
</source>
ZipEntry: getCrc()
<source lang="java">
import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class Main {
public static void main(String[] args) throws Exception {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
long crc = ze.getCrc();
System.out.println("Its CRC is " + crc);
String comment = ze.getComment();
if (comment != null && !comment.equals("")) {
System.out.println(comment);
}
if (ze.isDirectory()) {
System.out.println(name + " is a directory");
}
}
}
}
</source>
ZipEntry: getName()
<source lang="java">
import java.io.FileInputStream; import java.util.Date; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class Main {
public static void main(String[] args) throws Exception {
FileInputStream fis = new FileInputStream(args[0]);
ZipInputStream zis = new ZipInputStream(fis);
ZipEntry ze;
while ((ze = zis.getNextEntry()) != null)
System.out.println(ze.getName() + " [" + ze.getSize() + "] ["
+ new Date(ze.getTime()).toString() + "]");
}
}
</source>
ZipEntry: getSize()
<source lang="java">
import java.io.FileInputStream; import java.util.Date; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class Main {
public static void main(String[] args) throws Exception {
FileInputStream fis = new FileInputStream(args[0]);
ZipInputStream zis = new ZipInputStream(fis);
ZipEntry ze;
while ((ze = zis.getNextEntry()) != null)
System.out.println(ze.getName() + " [" + ze.getSize() + "] ["
+ new Date(ze.getTime()).toString() + "]");
}
}
</source>
ZipEntry: getTime()
<source lang="java">
import java.io.FileInputStream; import java.util.Date; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class Main {
public static void main(String[] args) throws Exception {
FileInputStream fis = new FileInputStream(args[0]);
ZipInputStream zis = new ZipInputStream(fis);
ZipEntry ze;
while ((ze = zis.getNextEntry()) != null)
System.out.println(ze.getName() + " [" + ze.getSize() + "] ["
+ new Date(ze.getTime()).toString() + "]");
}
}
</source>
ZipEntry: isDirectory()
<source lang="java">
import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class Main {
public static void main(String[] args) throws Exception {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
long crc = ze.getCrc();
System.out.println("Its CRC is " + crc);
String comment = ze.getComment();
if (comment != null && !comment.equals("")) {
System.out.println(comment);
}
if (ze.isDirectory()) {
System.out.println(name + " is a directory");
}
}
}
}
</source>
ZipEntry.STORED
<source lang="java">
import java.util.Date; import java.util.Enumeration; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; public class Main {
public static void main(String[] args) throws Exception {
ZipFile zf = new ZipFile("your.zip");
Enumeration e = zf.entries();
while (e.hasMoreElements()) {
ZipEntry ze = (ZipEntry) e.nextElement();
String name = ze.getName();
Date lastModified = new Date(ze.getTime());
long uncompressedSize = ze.getSize();
long compressedSize = ze.getCompressedSize();
int method = ze.getMethod();
if (method == ZipEntry.STORED) {
System.out.println(name + " was stored at " + lastModified);
System.out.println("with a size of " + uncompressedSize + " bytes");
} else if (method == ZipEntry.DEFLATED) {
System.out.println(name + " was deflated at " + lastModified);
System.out.println("from " + uncompressedSize + " bytes to " + compressedSize
+ " bytes, a savings of " + (100.0 - 100.0 * compressedSize / uncompressedSize) + "%");
} else {
System.out.println(name + " was compressed at " + lastModified);
System.out.println("from " + uncompressedSize + " bytes to " + compressedSize
+ " bytes, a savings of " + (100.0 - 100.0 * compressedSize / uncompressedSize) + "%");
}
}
}
}
</source>
