package com.scout.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Enumeration;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
public class ZipUtil {
/**
* 功能：压缩成zip
* @author 吴晓聪 添加于 2008-5-19
* @param zipFilep 压缩后的zip文件名
* @param path 压缩路径
* @throws java.lang.Exception
*/
public static void zip(String zipFilep, String path) throws Exception {
System.out.println("压缩文件开始.....................");
File zipFile = new File(zipFilep);
if (!zipFile.exists()) {
zipFile.createNewFile();
}
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
write(out, path, "");
out.close();
System.out.println("压缩文件结束！");
}
/**
* 功能：写压缩流
* @author 吴晓聪 添加于 2008-5-19
* @param out 压缩输出流
* @param path 压缩路径
* @param base 压缩式的基础目录
* @throws java.lang.Exception
*/
private static void write(ZipOutputStream out, String path, String base)
throws Exception {
File file = new File(path);
if (file.isDirectory()) {//文件夹，递归
base = base.length() == 0 ? "" : base + File.separator;
File[] tempFiles = file.listFiles();
for (int i = 0; i < tempFiles.length; i++) {
write(out, tempFiles[i].getPath(), base+tempFiles[i].getName());
}
} else {//文件，压缩
byte[] buff = new byte[2048];
int bytesRead = -1;
ZipEntry entry = new ZipEntry(base);
out.putNextEntry(entry);
InputStream in = new BufferedInputStream(new FileInputStream(file));
while (-1 != (bytesRead = in.read(buff, 0, buff.length))) {
out.write(buff, 0, bytesRead);
}
in.close();
out.flush();
}
}
/**
* 功能：解压缩
* @author 吴晓聪 添加于 2008-5-19
* @param zipFilename zip文件
* @param destPath 解压缩路径
* @throws java.lang.Exception
*/
public static void unZip(String zipFilename, String destPath) throws Exception {
System.out.println("解压文件开始.....................");
ZipFile zip = new ZipFile(zipFilename, "GB2312");
Enumeration enu = zip.getEntries();//得到压缩文件夹中的所有文件
while (enu.hasMoreElements()) {
ZipEntry entry = (ZipEntry) enu.nextElement();
String file = destPath + entry.getName();
write(zip, entry, file);
}
System.out.println("解压文件结束！");
}
/**
* 功能：将解压缩之后的文件写入目录
* @author 吴晓聪 添加于 2008-5-19
* @param zip 压缩文件
* @param entry 压缩文件实体——压缩文件中的文件
* @param fileLocation 解压缩之后的文件路径
* @throws Exception
*/
private static void write(ZipFile zip, ZipEntry entry, String file) throws Exception {
if (entry.isDirectory()) {
File f = new File(file);
f.mkdirs();
} else {
File f = new File(file);
createDir(f);
FileOutputStream fos = new FileOutputStream(f);
byte[] buffer = new byte[8196];
InputStream is = zip.getInputStream(entry);
for (int len = is.read(buffer, 0, buffer.length); len != -1; len = is.read(buffer, 0, 8196)) {
fos.write(buffer, 0, len);
}
fos.close();
}
}
/**
* 功能：创建目录
* @author 吴晓聪 添加于 2008-5-19
* @param file 文件或目录
*/
private static void createDir(File file){
if(file.isDirectory() && !file.exists()){
file.mkdirs();
}else{
String path = file.getPath();
int i = path.lastIndexOf(File.separator);
path = path.substring(0,i);
new File(path).mkdirs();
}
}
/**
* 功能：测试样例
* @author 吴晓聪 添加于 2008-5-19
* @param args
*/
public static void main(String[] args) {
try {
zip("f:\\cong.zip", "F:\\资料");
unZip("f:\\cong.zip", "f:\\cong\\");
} catch (Exception e) {
e.printStackTrace();
}
}
}
此源文件直接可以使用，关键点如下：
1 要解决中文乱码问题，需用ant下的tool工具包，只要将ant.jar放到类路径下即可。
2 解压缩时，得到的压缩实体为文件，创建文件时，需要先创建文件夹
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import java.io.File;
import org.apache.tools.zip.ZipOutputStream; //这个包在ant.jar里，要到官方网下载,tomact里有这个ant.jar
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipEntry;
public class CompressBook {
public CompressBook() {}
/*
* inputFileName 输入一个文件夹
* zipFileName 输出一个压缩文件夹
*/
public void zip(String inputFileName) throws Exception {
String zipFileName = "c:\\test.zip"; //打包后文件名字
System.out.println(zipFileName);
zip(zipFileName, new File(inputFileName));
}
private void zip(String zipFileName, File inputFile) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
zip(out, inputFile, "");
System.out.println("zip done");
out.close();
}
private void zip(ZipOutputStream out, File f, String base) throws Exception {
if (f.isDirectory()) {
File[] fl = f.listFiles();
out.putNextEntry(new org.apache.tools.zip.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 org.apache.tools.zip.ZipEntry(base));
FileInputStream in = new FileInputStream(f);
int b;
System.out.println(base);
while ( (b = in.read()) != -1) {
out.write(b);
}
in.close();
}
}
public static void main(String [] temp){
CompressBook book = new CompressBook();
try {
book.zip("c:\\c");//你要压缩的文件夹
}catch (Exception ex) {
ex.printStackTrace();
}
}
}
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