最近工作中总是做一件重复的事情，就是对一个zip文件进行解压缩，然后再根据某些配置文件，需要对zip包中的内容进行替换，然后还需要将解压后的文件再压缩，关于压缩和解压缩的方法很多，可以还是选择用java语言来实现这一功能，由于文件的数量比较多，而且又多数都是二进制文件，所以个人觉得不管是复制，还是解压缩，对文件的操作要求都是比较高的，进过再三的比较，最后选用了一位仁兄的推荐的程序，据说这段代码是出自ant.jar的source,具体关于zip和unzip的程序如下：
[java] view plaincopyprint?
package com.eric.io;
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 org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
public class Decompression {
private static final int BUFFEREDSIZE = 1024;
public Decompression() {
}
/**
* 解压zip格式的压缩文件到当前文件夹
*
* @param zipFileName
* @throws Exception
*/
@SuppressWarnings("unchecked")
public synchronized void unzipFile(String zipFileName) throws Exception {
try {
File f = new File(zipFileName);
ZipFile zipFile = new ZipFile(zipFileName);
if ((!f.exists()) && (f.length() <= 0)) {
throw new Exception("要解压的文件不存在!");
}
System.out.println(zipFileName + " was uncompressing....");
String strPath, gbkPath, strtemp;
File tempFile = new File(f.getParent());
strPath = tempFile.getAbsolutePath();
java.util.Enumeration e = zipFile.getEntries();
while (e.hasMoreElements()) {
org.apache.tools.zip.ZipEntry zipEnt = (ZipEntry) e
.nextElement();
gbkPath = zipEnt.getName();
System.out.println("uncomress:" + zipEnt.getName());
if (zipEnt.isDirectory()) {
strtemp = strPath + "/" + gbkPath;
File dir = new File(strtemp);
dir.mkdirs();
continue;
} else {
// 读写文件
InputStream is = zipFile.getInputStream(zipEnt);
BufferedInputStream bis = new BufferedInputStream(is);
gbkPath = zipEnt.getName();
strtemp = strPath + "/" + gbkPath;
// 建目录
String strsubdir = gbkPath;
for (int i = 0; i < strsubdir.length(); i++) {
if (strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {
String temp = strPath + "/"
+ strsubdir.substring(0, i);
File subdir = new File(temp);
if (!subdir.exists())
subdir.mkdir();
}
}
FileOutputStream fos = new FileOutputStream(strtemp);
BufferedOutputStream bos = new BufferedOutputStream(fos);
int c;
while ((c = bis.read()) != -1) {
bos.write((byte) c);
}
bos.close();
fos.close();
}
}
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
/**
* 解压zip格式的压缩文件到指定位置
*
* @param zipFileName
* 压缩文件
* @param extPlace
* 解压目录
* @throws Exception
*/
@SuppressWarnings("unchecked")
public synchronized void unzip(String zipFileName, String extPlace)
throws Exception {
try {
(new File(extPlace)).mkdirs();
File f = new File(zipFileName);
ZipFile zipFile = new ZipFile(zipFileName);
if ((!f.exists()) && (f.length() <= 0)) {
throw new Exception("要解压的文件不存在!");
}
String strPath, gbkPath, strtemp;
File tempFile = new File(extPlace);
strPath = tempFile.getAbsolutePath();
java.util.Enumeration e = zipFile.getEntries();
while (e.hasMoreElements()) {
org.apache.tools.zip.ZipEntry zipEnt = (ZipEntry) e
.nextElement();
gbkPath = zipEnt.getName();
if (zipEnt.isDirectory()) {
strtemp = strPath + File.separator + gbkPath;
File dir = new File(strtemp);
dir.mkdirs();
continue;
} else {
// 读写文件
InputStream is = zipFile.getInputStream(zipEnt);
BufferedInputStream bis = new BufferedInputStream(is);
gbkPath = zipEnt.getName();
strtemp = strPath + File.separator + gbkPath;
// 建目录
String strsubdir = gbkPath;
for (int i = 0; i < strsubdir.length(); i++) {
if (strsubdir.substring(i, i + 1).equalsIgnoreCase("/")) {
String temp = strPath + File.separator
+ strsubdir.substring(0, i);
File subdir = new File(temp);
if (!subdir.exists())
subdir.mkdir();
}
}
FileOutputStream fos = new FileOutputStream(strtemp);
BufferedOutputStream bos = new BufferedOutputStream(fos);
int c;
while ((c = bis.read()) != -1) {
bos.write((byte) c);
}
bos.close();
fos.close();
}
}
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
/**
* 压缩zip格式的压缩文件
*
* @param inputFilename
* 压缩的文件或文件夹及详细路径
* @param zipFilename
* 输出文件名称及详细路径
* @throws IOException
*/
public synchronized void zip(String inputFilename, String zipFilename)
throws IOException {
zip(new File(inputFilename), zipFilename);
}
/**
* 压缩zip格式的压缩文件
*
* @param inputFile
* 需压缩文件
* @param zipFilename
* 输出文件及详细路径
* @throws IOException
*/
public synchronized void zip(File inputFile, String zipFilename)
throws IOException {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
zipFilename));
try {
zip(inputFile, out, "");
System.out.println(zipFilename + " was genrated successful....");
} catch (IOException e) {
throw e;
} finally {
out.close();
}
}
/**
* 压缩zip格式的压缩文件
*
* @param inputFile
* 需压缩文件
* @param out
* 输出压缩文件
* @param base
* 结束标识
* @throws IOException
*/
@SuppressWarnings("unused")
private synchronized void zip(File inputFile, ZipOutputStream out,
String base) throws IOException {
System.out.println("compress " + inputFile + " ...");
if (inputFile.isDirectory()) {
File[] inputFiles = inputFile.listFiles();
out.putNextEntry(new ZipEntry(base + "/"));
base = base.length() == 0 ? "" : base + "/";
for (int i = 0; i < inputFiles.length; i++) {
System.out.println("compress file:" + inputFiles[i].getName());
zip(inputFiles[i], out, base + inputFiles[i].getName());
}
} else {
if (base.length() > 0) {
out.putNextEntry(new ZipEntry(base));
} else {
out.putNextEntry(new ZipEntry(inputFile.getName()));
}
FileInputStream in = new FileInputStream(inputFile);
try {
int c;
byte[] by = new byte[BUFFEREDSIZE];
while ((c = in.read(by)) != -1) {
out.write(by, 0, c);
}
} catch (IOException e) {
throw e;
} finally {
in.close();
}
}
}
// public static void main(String[] args) {
// Decompression decompression = new Decompression();
// try {
// decompression.unzipFile("c:/test.zip");
// decompression.unzip("c:/test.zip", "c:/test22");
// decompression.zip("c:/test22", "c:/test222.zip");
// } catch (Exception e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// }
}
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