java 文件解压缩zip_java解压缩zip文件

/*

提供zip文件的解压缩接口：

AdapterZipFile：

输入：zipFileName(zip文件的绝对路径)，outputDirectory(zip文件解压缩后的存放路径)

输出：

说明：初始化函数

unZipFile：

输入：无

输出：

说明：解压缩zip文件，解压缩后存放到outputDirectory路径下

GetZipFileList：

输入：无

输出：list

说明：解压缩后的文件列表绝对路径存放在ArrayList动态数组中

*/

package com.mop.pushmail.adapter.htmlziprar;

import java.io.*;

import java.util.*;

import org.apache.tools.zip.*;

public class AdapterZipFile {

String zipFileName = null;//zip文件的绝对路径

String outputDirectory = null;//zip文件解压缩后的存放路径

ArrayList list = new ArrayList();//文件解压缩后的文件列表绝对路径

// public AdapterZipFile(String zipFileName) {

// if(zipFileName == null){

// return;

// }

// this.zipFileName = zipFileName.replace("/","\\");

// unZipFile();

// }

//初始化

public AdapterZipFile(String zipFileName, String outputDirectory){

if(zipFileName == null){

return;

}

this.zipFileName = zipFileName;

if(outputDirectory != null){

this.outputDirectory = outputDirectory;

}else{

this.outputDirectory = zipFileName.substring(0,

zipFileName.replace('\\', '/').lastIndexOf("/"));

}

// unZipFile();

}

//创建目录

private void createDirectory(String directory, String subDirectory) {

String dir[];

File fl = new File(directory);

try {

if (subDirectory == "" && fl.exists() != true)

fl.mkdirs();

else if (subDirectory != "") {

dir = subDirectory.replace("\\","/").split("/");

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

File subFile = new File(directory + File.separator + dir[i]);

if (!subFile.exists())

subFile.mkdir();

directory += File.separator + dir[i];

}

}

}catch (Exception ex) {

System.out.println(ex.getMessage());

}

}

//解压缩文件

//如果outputDierctory为null，解压到zipFileName文件的当前目录下

public void unZipFile() {

File file = new File(zipFileName);

if (!file.exists()) {

return;

}

createDirectory(outputDirectory, "");

try {

ZipFile zipFile = new ZipFile(zipFileName);

Enumeration e = zipFile.getEntries();

ZipEntry zipEntry = null;

while (e.hasMoreElements()) {

zipEntry = (ZipEntry) e.nextElement();

if (zipEntry.isDirectory()) {

String name = zipEntry.getName();

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

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

f.mkdir();

} else {

String fileName = zipEntry.getName();

fileName = fileName.replace('\\', '/');

//文件在多层目录下 这时需要创建目录如：d1/d2/1.txt

if (fileName.indexOf("/") != -1) {

createDirectory(outputDirectory, fileName.substring(0,

fileName.lastIndexOf("/")));

fileName = fileName.substring(

fileName.lastIndexOf("/") + 1, fileName

.length());

}

list.add(outputDirectory + File.separator

+ zipEntry.getName());

File f = new File(outputDirectory + File.separator

+ zipEntry.getName());

f.createNewFile();

InputStream in = zipFile.getInputStream(zipEntry);

FileOutputStream out = new FileOutputStream(f);

byte[] by = new byte[1024];

int c;

while ((c = in.read(by)) != -1) {

out.write(by, 0, c);

}

out.close();

in.close();

}

}

} catch (Exception ex) {

System.out.println(ex.getMessage());

}

}

//返回zip文件解压撒后文件列表的绝对路径 public ArrayList GetZipFileList(){ return list; } }