zip

一个zip文件可能是压缩一个或多个文件，对于每一个我们都需要创建一个ZipEntry对象并依次放进Zip文件中

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

import java.util.zip.ZipOutputStream;

public class Zip {

public static void main(String[] args) {

File f=new File("GUI");

createZip(f+".zip",f);

}

private static void createZip(String obj, File f) {

try {

ZipOutputStream zop=new ZipOutputStream(new FileOutputStream(obj));

ZipInputStream zip=new ZipInputStream(new FileInputStream(obj));

ZipEntry ze=new ZipEntry(obj);

zop.putNextEntry(ze);

compressFile(zop,"",f);

deCompressFile(zip,obj);

zop.close();

zip.close();

}

catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

private static void deCompressFile(ZipInputStream zip, String source) {

try {

ZipEntry en=null;

while((en=zip.getNextEntry())!=null)

{

String obj=en.getName();

File file=new File(obj);

File path=null;

if(file.getParentFile().exists()) 

path=new File(file.getParentFile().getPath());

if(en.isDirectory())

{

if(!file.exists())

file.mkdirs();

continue;

}

if(!path.exists())

{

path.mkdirs();

}

FileOutputStream out= new FileOutputStream(file);

byte[] buf=new byte[1024];

int len;

while((len=zip.read(buf))!=-1)

{

out.write(buf,0,len);

}

out.close();

}

zip.closeEntry();

} catch (FileNotFoundException e) {

} catch (IOException e) {

e.printStackTrace();

}

}

private static void compressFile(ZipOutputStream zop, String dir,File f) throws IOException {

if(f.exists())

{ 

if(f.isDirectory())

{

File[] files=f.listFiles();

dir=dir+(dir.length()==0?"":"/")+f.getName();

for(File file:files)

{

compressFile(zop,dir,file);

}

}

else

{

InputStream is = new BufferedInputStream(new FileInputStream(f));

        int readLen = -1;

        byte[] buf=new byte[1024];

        

      

        while ((readLen = is.read(buf)) != -1) {

                zop.write(buf, 0, readLen);

        }

        is.close();

}

}

}

}