文件压缩与解压缩

package com;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Zipper {
 private String zipTarget;
 private String zipSource;
 
 public Zipper(String zipTarget, String zipSource) {
  super();
  this.zipTarget = zipTarget;
  this.zipSource = zipSource;
 }
 public void compress(){  //压缩
  try {
   FileOutputStream fos = new FileOutputStream(zipTarget);
   ZipOutputStream zos = new ZipOutputStream(fos);
   zos.setLevel(9);
   File file = new File(zipSource);
   if(file.isDirectory()){
    String[] fileList = file.list();
    for(int i=0;i<fileList.length;i++){
     ZipEntry ze = new ZipEntry(fileList[i]);
     System.out.println("正在压缩文件"+fileList[i]);
     FileInputStream fis = new FileInputStream(file+"\\"+fileList[i]);
     zos.putNextEntry(ze);
     int c = -1;
     while((c = fis.read()) != -1){
      zos.write(c);
     }
     fis.close();
    }
   }
   zos.closeEntry();
   zos.close();
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 public static void main(String[] args) {
  Zipper z = new Zipper("history.zip", "D:\\文库资料\\IT笔试题");
  z.compress(); 
 }
}

解压缩

package com;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class UnZipper {   //解压缩 
 private String zipSource;
 
 public UnZipper(String zipSource) {
  super();
  this.zipSource = zipSource;
 }
 public void upCompress(){
  try {
   ZipFile zf = new ZipFile(zipSource);  //用于创建一个ZIP格式压缩文件的对象，其作用类似于文件描述File类
   Enumeration es = zf.entries();    //获得压缩包内文件列表
   System.out.println("开始解压缩...");
   while(es.hasMoreElements()){
    ZipEntry ze = (ZipEntry)es.nextElement();
    System.out.println("当前解压文件为:"+ze.getName());
    if(ze.isDirectory()){
     File ff = new File("newZip",ze.getName());
     ff.mkdirs();
    }
    else{
     InputStream in = zf.getInputStream(ze);
     File ff = new File("newZip",ze.getName());
     File fp = ff.getParentFile();
     fp.mkdirs();
     FileOutputStream fos = new FileOutputStream(ff);
     int c;
     while((c=in.read()) != -1)
      fos.write(c);
    }
   }
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
 public static void main(String[] args) {
  new UnZipper("history.zip").upCompress();
 }
}