java 文件压缩
2013-10-30 11:51
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import
java.io.*;
import org.apache.tools.zip.*;
import java.util.Enumeration;
public class
AntZip{
private
ZipFile
zipFile;
private
ZipOutputStream
zipOut;
//压缩Zip
private
ZipEntry
zipEntry;
private
static
int
bufSize;
//size of bytes
private
byte[]
buf;
private
int
readedBytes;
public
AntZip(){
this(512);
}
public AntZip(int bufSize){
this.bufSize = bufSize;
this.buf = new byte[this.bufSize];
}
//压缩文件夹内的文件
public void
doZip(String zipDirectory){//zipDirectoryPath:需要压缩的文件夹名
File file;
File zipDir;
zipDir = new File(zipDirectory);
String zipFileName = zipDir.getName() +
".zip";//压缩后生成的zip文件名
try{
this.zipOut = new ZipOutputStream(new BufferedOutputStream(new
FileOutputStream(zipFileName)));
handleDir(zipDir , this.zipOut);
this.zipOut.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
//由doZip调用,递归完成目录文件读取
private void
handleDir(File dir , ZipOutputStream zipOut)throws
IOException{
FileInputStream fileIn;
File[] files;
files = dir.listFiles();
if(files.length == 0){//如果目录为空,则单独创建之.
//ZipEntry的isDirectory()方法中,目录以"/"结尾.
this.zipOut.putNextEntry(new ZipEntry(dir.toString() + "/"));
this.zipOut.closeEntry();
}
else{//如果目录不为空,则分别处理目录和文件.
for(File fileName : files){
//System.out.println(fileName);
if(fileName.isDirectory()){
handleDir(fileName , this.zipOut);
}
else{
fileIn = new FileInputStream(fileName);
this.zipOut.putNextEntry(new
ZipEntry(fileName.toString()));
while((this.readedBytes =
fileIn.read(this.buf))>0){
this.zipOut.write(this.buf , 0 , this.readedBytes);
}
this.zipOut.closeEntry();
}
}
}
}
//解压指定zip文件
public void
unZip(String unZipfileName){//unZipfileName需要解压的zip文件名
FileOutputStream fileOut;
File file;
InputStream inputStream;
try{
this.zipFile = new ZipFile(unZipfileName);
for(Enumeration entries = this.zipFile.getEntries();
entries.hasMoreElements();){
ZipEntry entry = (ZipEntry)entries.nextElement();
file = new File(entry.getName());
if(entry.isDirectory()){
file.mkdirs();
}
else{
//如果指定文件的目录不存在,则创建之.
File parent = file.getParentFile();
if(!parent.exists()){
parent.mkdirs();
}
inputStream = zipFile.getInputStream(entry);
fileOut = new FileOutputStream(file);
while(( this.readedBytes = inputStream.read(this.buf) )
> 0){
fileOut.write(this.buf , 0 , this.readedBytes );
}
fileOut.close();
inputStream.close();
}
}
this.zipFile.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
//设置缓冲区大小
public void
setBufSize(int bufSize){
this.bufSize = bufSize;
}
//测试AntZip类
public
static void main(String[] args)throws Exception{
if(args.length==2){
String name = args[1];
AntZip zip = new AntZip();
if(args[0].equals("-zip"))
zip.doZip(name);
else if(args[0].equals("-unzip"))
zip.unZip(name);
}
else{
System.out.println("Usage:");
System.out.println("压缩:java AntZip -zip directoryName");
System.out.println("解压:java AntZip -unzip fileName.zip");
throw new Exception("Arguments error!");
}
}
}
java.io.*;
import org.apache.tools.zip.*;
import java.util.Enumeration;
public class
AntZip{
private
ZipFile
zipFile;
private
ZipOutputStream
zipOut;
//压缩Zip
private
ZipEntry
zipEntry;
private
static
int
bufSize;
//size of bytes
private
byte[]
buf;
private
int
readedBytes;
public
AntZip(){
this(512);
}
public AntZip(int bufSize){
this.bufSize = bufSize;
this.buf = new byte[this.bufSize];
}
//压缩文件夹内的文件
public void
doZip(String zipDirectory){//zipDirectoryPath:需要压缩的文件夹名
File file;
File zipDir;
zipDir = new File(zipDirectory);
String zipFileName = zipDir.getName() +
".zip";//压缩后生成的zip文件名
try{
this.zipOut = new ZipOutputStream(new BufferedOutputStream(new
FileOutputStream(zipFileName)));
handleDir(zipDir , this.zipOut);
this.zipOut.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
//由doZip调用,递归完成目录文件读取
private void
handleDir(File dir , ZipOutputStream zipOut)throws
IOException{
FileInputStream fileIn;
File[] files;
files = dir.listFiles();
if(files.length == 0){//如果目录为空,则单独创建之.
//ZipEntry的isDirectory()方法中,目录以"/"结尾.
this.zipOut.putNextEntry(new ZipEntry(dir.toString() + "/"));
this.zipOut.closeEntry();
}
else{//如果目录不为空,则分别处理目录和文件.
for(File fileName : files){
//System.out.println(fileName);
if(fileName.isDirectory()){
handleDir(fileName , this.zipOut);
}
else{
fileIn = new FileInputStream(fileName);
this.zipOut.putNextEntry(new
ZipEntry(fileName.toString()));
while((this.readedBytes =
fileIn.read(this.buf))>0){
this.zipOut.write(this.buf , 0 , this.readedBytes);
}
this.zipOut.closeEntry();
}
}
}
}
//解压指定zip文件
public void
unZip(String unZipfileName){//unZipfileName需要解压的zip文件名
FileOutputStream fileOut;
File file;
InputStream inputStream;
try{
this.zipFile = new ZipFile(unZipfileName);
for(Enumeration entries = this.zipFile.getEntries();
entries.hasMoreElements();){
ZipEntry entry = (ZipEntry)entries.nextElement();
file = new File(entry.getName());
if(entry.isDirectory()){
file.mkdirs();
}
else{
//如果指定文件的目录不存在,则创建之.
File parent = file.getParentFile();
if(!parent.exists()){
parent.mkdirs();
}
inputStream = zipFile.getInputStream(entry);
fileOut = new FileOutputStream(file);
while(( this.readedBytes = inputStream.read(this.buf) )
> 0){
fileOut.write(this.buf , 0 , this.readedBytes );
}
fileOut.close();
inputStream.close();
}
}
this.zipFile.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
//设置缓冲区大小
public void
setBufSize(int bufSize){
this.bufSize = bufSize;
}
//测试AntZip类
public
static void main(String[] args)throws Exception{
if(args.length==2){
String name = args[1];
AntZip zip = new AntZip();
if(args[0].equals("-zip"))
zip.doZip(name);
else if(args[0].equals("-unzip"))
zip.unZip(name);
}
else{
System.out.println("Usage:");
System.out.println("压缩:java AntZip -zip directoryName");
System.out.println("解压:java AntZip -unzip fileName.zip");
throw new Exception("Arguments error!");
}
}
}
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