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:



/** 
* Zip文件工具类
* @author Luxh
*/
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;
}

}

测试代码:
[java] view plain copy print?
package cn.luxh.test;

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 Luxh
*/
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);
}
}