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 {
InputStream is = zipFile.getInputStream(zipEnt);
BufferedInputStream bis =
new BufferedInputStream(is);
gbkPath = zipEnt.getName();
strtemp = strPath +
"/" + gbkPath;
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 {
InputStream is = zipFile.getInputStream(zipEnt);
BufferedInputStream bis =
new BufferedInputStream(is);
gbkPath = zipEnt.getName();
strtemp = strPath + File.separator + gbkPath;
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();
}
}
}
}
转自：http://blog.csdn.net/eric_sunah/article/details/7082056
