通过java api实现解压缩zip示例

通过java api实现zip压缩格式的压缩与解压缩

代码如下:

package com.hongyuan.test;

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.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipOutputStream;

public class ZipTest {

public static void main(String[] args) throws IOException {
  unZip("bootstrap.zip");
  zip("bootstrap_01.zip","bootstrap/css/bootstrap.css","bootstrap/css/bootstrap.min.css");
 }

public static void unZip(String fileName) throws IOException{
  //获取压缩文件对象
  ZipFile zf = new ZipFile(fileName);

//遍历文件条目
  Enumeration<? extends ZipEntry> items = zf.entries();
  while (items.hasMoreElements()) {
   ZipEntry item = items.nextElement();
   String filePath = zf.getName().substring(0,
     zf.getName().lastIndexOf("."))
     + File.separator + item.getName();
   File fileDir = new File(filePath.substring(0,
     filePath.lastIndexOf("/")));
   if (!fileDir.exists()) {
    fileDir.mkdirs();
   }

//从流中读取文件
   OutputStream out = new FileOutputStream(filePath);
   InputStream in = zf.getInputStream(item);
   byte[] temp = new byte[1024];
   int len = 0;
   while ((len = in.read(temp)) > 0) {
    out.write(temp, 0, len);
   }
   in.close();
   out.close();
  }
  zf.close();
 }

public static void zip(String fileName,String... files) throws IOException{
  //构造压缩文件输出流
  ZipOutputStream zos=new ZipOutputStream(new FileOutputStream(fileName));
  for(int i=0,size=files.length;i<size;i++){
   //创建压缩实体
   ZipEntry entry=new ZipEntry(files[i].substring(files[i].lastIndexOf("/")+1));
   zos.putNextEntry(entry);
   //将文件内容输出到压缩流中
   InputStream is=new FileInputStream(files[i]);
   int count=0;
   byte[] buffer=new byte[1024];
   while((count=is.read(buffer))>=0){
    zos.write(buffer, 0, count);
   }
   zos.flush();
   zos.closeEntry();
   is.close();
  }
 }
}