java压缩和解压缩Zip、Jar、Gzip文件实例代码

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipOutputStreamTest {

 public static void main(String args[]) throws IOException {
 test1();
 test2();
 }
 
 public static void test1() throws IOException {
 ZipOutputStream zos = new ZipOutputStream(new FileOutputStream("D:\\testZip.zip"), Charset.forName("GBK"));
 //实例化一个名称为ab.txt的ZipEntry对象
 ZipEntry entry = new ZipEntry("ab.txt");
 //设置注释
 zos.setComment("zip测试for单个文件");
 //把生成的ZipEntry对象加入到压缩文件中，而之后往压缩文件中写入的内容都会放在这个ZipEntry对象里面
 zos.putNextEntry(entry);
 InputStream is = new FileInputStream("D:\\ab.txt");
 int len = 0;
 while ((len = is.read()) != -1)
  zos.write(len);
 is.close();
 zos.close();
 }
 
 public static void test2() throws IOException {
 File inFile = new File("D:\\test");
 ZipOutputStream zos = new ZipOutputStream(new FileOutputStream("D:\\test.zip"), Charset.forName("GBK"));
 zos.setComment("多文件处理");
 zipFile(inFile, zos, "");
 zos.close();
 }
 
 public static void zipFile(File inFile, ZipOutputStream zos, String dir) throws IOException {
 if (inFile.isDirectory()) {
  File[] files = inFile.listFiles();
  for (File file:files)
  zipFile(file, zos, dir + "\\" + inFile.getName());
 } else {
  String entryName = null;
  if (!"".equals(dir))
  entryName = dir + "\\" + inFile.getName();
  else
  entryName = inFile.getName();
  ZipEntry entry = new ZipEntry(entryName);
  zos.putNextEntry(entry);
  InputStream is = new FileInputStream(inFile);
  int len = 0;
  while ((len = is.read()) != -1)
  zos.write(len);
  is.close();
 }

 }
 
}

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

public class ZipInputStreamTest {

 public static void main(String args[]) throws IOException {
 File file = new File("D:\\test.zip");//压缩文件
 ZipFile zipFile = new ZipFile(file);//实例化ZipFile，每一个zip压缩文件都可以表示为一个ZipFile
 //实例化一个Zip压缩文件的ZipInputStream对象，可以利用该类的getNextEntry()方法依次拿到每一个ZipEntry对象
 ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(file), Charset.forName("GBK"));
 ZipEntry zipEntry = null;
 while ((zipEntry = zipInputStream.getNextEntry()) != null) {
  String fileName = zipEntry.getName();
  File temp = new File("D:\\unpackTest\\" + fileName);
  if (! temp.getParentFile().exists())
  temp.getParentFile().mkdirs();
  OutputStream os = new FileOutputStream(temp);
  //通过ZipFile的getInputStream方法拿到具体的ZipEntry的输入流
  InputStream is = zipFile.getInputStream(zipEntry);
  int len = 0;
  while ((len = is.read()) != -1)
  os.write(len);
  os.close();
  is.close();
 }
 zipInputStream.close();
 }
 
}