Java实现对文件做压缩和解压缩（一般用于文件批量导入导出）

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/**

* com.mysoftlife

* ver date author

* ──────────────────────────────────

* 2013 -8- 6 jmj

package com.mysoftlife;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.util.ArrayList;

import java.util.List;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

import java.util.zip.ZipOutputStream;

/**

* @author jmj

* @version

* @Date 2013 2013 -8- 6 下午01:57:56

public class Zip {

public Zip(){}

public List<File> fileList =new ArrayList<File>();

public List<File> getFileList() {

return fileList ;

}

public void setFileList(List<File> fileList) {

this.fileList = fileList;

}

/**

* 压缩目录下的文件

* @param zipFileName

* @param inputFile

* @throws Exception

* void

* @throws

* @2013-8 -6 下午02:47:19

public void zip(String zipFileName,String inputFile) throws Exception{

zip(zipFileName, new File(inputFile));

}

/**

* 压缩文件

* @param zipFileName

* @param inputFile

* @throws Exception

* void

* @throws

* @2013-8 -6 下午02:47:40

public void zip(String zipFileName, File inputFile) throws Exception {

ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));

zip(out, inputFile, "");

System. out.println("压缩成功!" );

out.close();

}

public void zip(ZipOutputStream out, File f, String base) throws Exception {

System. out.println("正在压缩 " + f.getName());

if (f.isDirectory()) {

File[] fl = f.listFiles();

out.putNextEntry( new ZipEntry(base + "/" ));

base = base.length() == 0 ? "" : base + "/" ;

for (int i = 0; i < fl.length; i++) {

zip(out, fl[i], base + fl[i].getName());

}

} else {

out.putNextEntry( new ZipEntry(base));

FileInputStream in = new FileInputStream(f);

int b;

while ((b = in.read()) != -1)

out.write(b);

in.close();

}

/**

* 解压缩

* @param zipFileName

* @param outputDirectory

* @throws Exception

* void

* @throws

* @2013-8 -6 下午02:47:59

public void unzip(String zipFileName, String outputDirectory) throws

Exception {

ZipInputStream in = new ZipInputStream(new FileInputStream(zipFileName));

ZipEntry z;

while ( (z = in.getNextEntry()) != null) {

System. out.println("正在解压 " + z.getName());

if (z.isDirectory()) {

String name = z.getName();

name = name.substring(0, name.length() - 1);

File f = new File(outputDirectory + File.separator + name);

f.mkdir();

System. out.println("创建目录 " + outputDirectory + File.separator + name);

} else {

File f = new File(outputDirectory + File.separator + z.getName());

f.createNewFile();

FileOutputStream out = new FileOutputStream(f);

//获取解压后的单个文件

if(f!=null ){

fileList.add(f);

}

int b;

while ( (b = in.read()) != -1)

out.write(b);

out.close();

}

in.close();

}

public static void main(String[] args) {

Zip z= new Zip();

try {

// z.zip("D://projects.zip", "D://projects");//压缩文件

z.unzip( "D://wenjian//projects.zip" , "D://wenjian" );//解压缩文件

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

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