使用commons-compress操作zip文件(压缩和解压缩)

　　Apache Commons Compress是一个压缩、解压缩文件的类库。

　　可以操作ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200 and bzip2格式的文件，功能比较强大。

　　在这里写两个用Commons Compress把文件压缩成zip和从zip解压缩的方法。

　　直接贴上工具类代码：






package rockecsn.jaker;



import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

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 org.apache.commons.compress.archivers.ArchiveEntry;

import org.apache.commons.compress.archivers.zip.Zip64Mode;

import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;

import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;

import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;





/**

* Zip文件工具类

* @author jaker

*/

public class ZipFileUtil {



/**

* 把文件压缩成zip格式

* @param files 需要压缩的文件

* @param zipFilePath 压缩后的zip文件路径 ,如"D:/test/aa.zip";

*/

public static void compressFiles2Zip(File[] files,String zipFilePath) {

if(files != null && files.length >0) {

if(isEndsWithZip(zipFilePath)) {

ZipArchiveOutputStream zaos = null;

try {

File zipFile = new File(zipFilePath);

zaos = new ZipArchiveOutputStream(zipFile);

//Use Zip64 extensions for all entries where they are required

zaos.setUseZip64(Zip64Mode.AsNeeded);



//将每个文件用ZipArchiveEntry封装

//再用ZipArchiveOutputStream写到压缩文件中

for(File file : files) {

if(file != null) {

ZipArchiveEntry zipArchiveEntry = new ZipArchiveEntry(file,file.getName());

zaos.putArchiveEntry(zipArchiveEntry);

InputStream is = null;

try {

is = new BufferedInputStream(new FileInputStream(file));

byte[] buffer = new byte[1024 * 5];

int len = -1;

while((len = is.read(buffer)) != -1) {

//把缓冲区的字节写入到ZipArchiveEntry

zaos.write(buffer, 0, len);

}

//Writes all necessary data for this entry.

zaos.closeArchiveEntry();

}catch(Exception e) {

throw new RuntimeException(e);

}finally {

if(is != null)

is.close();

}



}

}

zaos.finish();

}catch(Exception e){

throw new RuntimeException(e);

}finally {

try {

if(zaos != null) {

zaos.close();

}

} catch (IOException e) {

throw new RuntimeException(e);

}

}



}



}



}



/**

* 把zip文件解压到指定的文件夹

* @param zipFilePath zip文件路径, 如 "D:/test/aa.zip"

* @param saveFileDir 解压后的文件存放路径, 如"D:/test/"

*/

public static void decompressZip(String zipFilePath,String saveFileDir) {

if(isEndsWithZip(zipFilePath)) {

File file = new File(zipFilePath);

if(file.exists()) {

InputStream is = null;

//can read Zip archives

ZipArchiveInputStream zais = null;

try {

is = new FileInputStream(file);

zais = new ZipArchiveInputStream(is);

ArchiveEntry archiveEntry = null;

//把zip包中的每个文件读取出来

//然后把文件写到指定的文件夹

while((archiveEntry = zais.getNextEntry()) != null) {

//获取文件名

String entryFileName = archiveEntry.getName();

//构造解压出来的文件存放路径

String entryFilePath = saveFileDir + entryFileName;

byte[] content = new byte[(int) archiveEntry.getSize()];

zais.read(content);

OutputStream os = null;

try {

//把解压出来的文件写到指定路径

File entryFile = new File(entryFilePath);

os = new BufferedOutputStream(new FileOutputStream(entryFile));

os.write(content);

}catch(IOException e) {

throw new IOException(e);

}finally {

if(os != null) {

os.flush();

os.close();

}

}



}

}catch(Exception e) {

throw new RuntimeException(e);

}finally {

try {

if(zais != null) {

zais.close();

}

if(is != null) {

is.close();

}

} catch (IOException e) {

throw new RuntimeException(e);

}

}

}

}

}



/**

* 判断文件名是否以.zip为后缀

* @param fileName 需要判断的文件名

* @return 是zip文件返回true,否则返回false

*/

public static boolean isEndsWithZip(String fileName) {

boolean flag = false;

if(fileName != null && !"".equals(fileName.trim())) {

if(fileName.endsWith(".ZIP")||fileName.endsWith(".zip")){

flag = true;

}

}

return flag;

}



}


　　再来测试一下：


package rockecsn.jaker;



import java.io.File;



import org.junit.Test;



import cn.luxh.utils.ZipFileUtil;



/**

* 测试ZipFileUtil的压缩和解压缩方法

* @author jaker

*/

public class ZipFileUtilTest {



@Test

public void testCompressFiles2Zip() {

//存放待压缩文件的目录

File srcFile = new File("D:/test");

//压缩后的zip文件路径

String zipFilePath = "d:/test2/test.zip";

if(srcFile.exists()) {

File[] files = srcFile.listFiles();

ZipFileUtil.compressFiles2Zip(files, zipFilePath);

}

}



@Test

public void testDecompressZip() {

//压缩包所在路径

String zipFilePath = "d:/test2/test.zip";

//解压后的文件存放目录

String saveFileDir = "d:/test2/";

//调用解压方法

ZipFileUtil.decompressZip(zipFilePath, saveFileDir);

}

}