通过java api实现zip压缩格式的压缩与解压缩

复制代码 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();

}

}

}