Java Tutorial/File/ZipInputStream

Create ZipInputStream from FileInputStream

   <source lang="java">

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class MainClass {

 public static void main(String[] args) throws IOException {
   for (int i = 0; i < args.length; i++) {
     FileInputStream fin = new FileInputStream(args[i]);
     ZipInputStream zin = new ZipInputStream(fin);
     ZipEntry ze = null;
     while ((ze = zin.getNextEntry()) != null) {
       System.out.println("Unzipping " + ze.getName());
       FileOutputStream fout = new FileOutputStream(ze.getName());
       for (int c = zin.read(); c != -1; c = zin.read()) {
         fout.write(c);
       }
       zin.closeEntry();
       fout.close();
     }
     zin.close();
   }
 }

}</source>

Decompress a zip file using ZipInputStream

   <source lang="java">

import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class Main {

 public static void main(String[] args) throws Exception {
   String zipname = "data.zip";
   FileInputStream fis = new FileInputStream(zipname);
   ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));
   ZipEntry entry;
   while ((entry = zis.getNextEntry()) != null) {
     System.out.println("Unzipping: " + entry.getName());
     int size;
     byte[] buffer = new byte[2048];
     FileOutputStream fos = new FileOutputStream(entry.getName());
     BufferedOutputStream bos = new BufferedOutputStream(fos, buffer.length);
     while ((size = zis.read(buffer, 0, buffer.length)) != -1) {
       bos.write(buffer, 0, size);
     }
     bos.flush();
     bos.close();
   }
   zis.close();
   fis.close();
 }

}</source>

Read zip file with ZipInputStream

   <source lang="java">

import java.io.FileInputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; class ZipReader {

 public static void main(String[] args) throws Exception {
   ZipInputStream zis = null;
   FileInputStream fis = new FileInputStream(args[0]);
   zis = new ZipInputStream(fis);
   ZipEntry ze;
   while ((ze = zis.getNextEntry()) != null)
     System.out.println(ze.getName());
 }

}</source>

Unzip using the ZipInputStream

   <source lang="java">

import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; public class MainClass {

 public static void main(String[] args) throws IOException {
   for (int i = 0; i < args.length; i++) {
     FileInputStream fin = new FileInputStream(args[i]);
     ZipInputStream zin = new ZipInputStream(fin);
     ZipEntry ze = null;
     while ((ze = zin.getNextEntry()) != null) {
       System.out.println("Unzipping " + ze.getName());
       FileOutputStream fout = new FileOutputStream(ze.getName());
       for (int c = zin.read(); c != -1; c = zin.read()) {
         fout.write(c);
       }
       zin.closeEntry();
       fout.close();
     }
     zin.close();
   }
 }

}</source>