基于apache.tools.zip压缩文件（夹）

package net.szh.zip;

 

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.util.zip.CRC32;

import java.util.zip.CheckedOutputStream;

 

import org.apache.tools.zip.ZipEntry;

import org.apache.tools.zip.ZipOutputStream;

 

public class ZipCompressor {

static final int BUFFER = 8192;

 

private File zipFile;

 

public ZipCompressor(String pathName) {

zipFile = new File(pathName);

}

 

public void compress(String srcPathName) {

File file = new File(srcPathName);

if (!file.exists())

throw new RuntimeException(srcPathName + "不存在！");

try {

FileOutputStream fileOutputStream = new FileOutputStream(zipFile);

CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,

new CRC32());

ZipOutputStream out = new ZipOutputStream(cos);

String basedir = "";

compress(file, out, basedir);

out.close();

} catch (Exception e) {

throw new RuntimeException(e);

}

}

 

private void compress(File file, ZipOutputStream out, String basedir) {

/* 判断是目录还是文件 */

if (file.isDirectory()) {

System.out.println("压缩：" + basedir + file.getName());

this.compressDirectory(file, out, basedir);

} else {

System.out.println("压缩：" + basedir + file.getName());

this.compressFile(file, out, basedir);

}

}

 

/** 压缩一个目录 */

private void compressDirectory(File dir, ZipOutputStream out, String basedir) {

if (!dir.exists())

return;

 

File[] files = dir.listFiles();

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

/* 递归 */

compress(files[i], out, basedir + dir.getName() + "/");

}

}

 

/** 压缩一个文件 */

private void compressFile(File file, ZipOutputStream out, String basedir) {

if (!file.exists()) {

return;

}

try {

BufferedInputStream bis = new BufferedInputStream(

new FileInputStream(file));

ZipEntry entry = new ZipEntry(basedir + file.getName());

out.putNextEntry(entry);

int count;

byte data[] = new byte[BUFFER];

while ((count = bis.read(data, 0, BUFFER)) != -1) {

out.write(data, 0, count);

}

bis.close();

} catch (Exception e) {

throw new RuntimeException(e);

}

}

}