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(); } }