展开全部

java.util.zip.*这个包下有ZipInputStream和ZipOutputStream这两个类，用于ZIP的读入解压，和生成ZIP文件的打包。

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 java.io.OutputStream;

import java.util.ArrayList;

import java.util.Enumeration;

import java.util.List;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import java.util.zip.ZipOutputStream;

import java.util.zip.GZIPInputStream;

import java.io.DataInputStream;

/**

* Description: 此类用于...

*

* @author wunaigang(2005-6-21)

* @version 1.0.0

*/

public class ZipManager {

/**

* zip压缩62616964757a686964616fe4b893e5b19e31333264653361功能测试. 将d:\\temp\\zipout目录下的所有文件连同子目录压缩到d:\\temp\\out.zip.

*

* @param baseDir 所要压缩的目录名(包含绝对路径)

* @param objFileName 压缩后的文件名

* @throws Exception

*/

public void createZip(String baseDir, String objFileName) throws Exception {

File folderObject = new File(baseDir);

if (folderObject.exists()){

List fileList = getSubFiles(new File(baseDir));

//压缩文件名

ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(objFileName));

ZipEntry ze = null;

byte[] buf = new byte[1024];

int readLen = 0;

for (int i = 0; i < fileList.size(); i++) {

File f = (File) fileList.get(i);

System.out.println("Adding: " + f.getPath() + f.getName());

//创建一个ZipEntry，并设置Name和其它的一些属性

ze = new ZipEntry(getAbsFileName(baseDir, f));

ze.setSize(f.length());

ze.setTime(f.lastModified());

//将ZipEntry加到zos中，再写入实际的文件内容

zos.putNextEntry(ze);

InputStream is = new BufferedInputStream(new FileInputStream(f));

while ((readLen = is.read(buf, 0, 1024)) != -1) {

zos.write(buf, 0, readLen);

}

is.close();

System.out.println("done...");

}

zos.close();

}else{

throw new Exception("this folder isnot exist!");

}

}

/**

* zip压缩功能测试. 将指定文件压缩后存到一压缩文件中

*

* @param baseDir 所要压缩的文件名

* @param objFileName 压缩后的文件名

* @return 压缩后文件的大小

* @throws Exception

*/

public long createFileToZip(String zipFilename,String sourceFileName) throws Exception {

File sourceFile = new File(sourceFileName);

byte[] buf = new byte[1024];

//压缩文件名

File objFile = new File(zipFilename);

ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(objFile));

ZipEntry ze = null;

//创建一个ZipEntry，并设置Name和其它的一些属性

ze = new ZipEntry(sourceFile.getName());

ze.setSize(sourceFile.length());

ze.setTime(sourceFile.lastModified());

//将ZipEntry加到zos中，再写入实际的文件内容

zos.putNextEntry(ze);

InputStream is = new BufferedInputStream(new FileInputStream(sourceFile));

int readLen = -1;

while ((readLen = is.read(buf, 0, 1024)) != -1) {

zos.write(buf, 0, readLen);

}

is.close();

zos.close();

return objFile.length();

}

/**

* zip压缩功能测试. 将指定文件压缩后存到一压缩文件中

*

* @param baseDir 所要压缩的文件名

* @param objFileName 压缩后的文件名

* @return 压缩后文件的大小

* @throws Exception

*/

public long createFileToZip(File sourceFile,File zipFile)throws IOException {

byte[] buf = new byte[1024];

//压缩文件名

File objFile = zipFile;

ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(objFile));

ZipEntry ze = null;

//创建一个ZipEntry，并设置Name和其它的一些属性

ze = new ZipEntry(sourceFile.getName());

ze.setSize(sourceFile.length());

ze.setTime(sourceFile.lastModified());

//将ZipEntry加到zos中，再写入实际的文件内容

zos.putNextEntry(ze);

InputStream is = new BufferedInputStream(new FileInputStream(sourceFile));

int readLen = -1;

while ((readLen = is.read(buf, 0, 1024)) != -1) {

zos.write(buf, 0, readLen);

}

is.close();

zos.close();

return objFile.length();

}

/**

* 测试解压缩功能. 将d:\\download\\test.zip连同子目录解压到d:\\temp\\zipout目录下.

*

* @throws Exception

*/

public void releaseZipToFile(String sourceZip, String outFileName)

throws IOException{

ZipFile zfile=new ZipFile(sourceZip);

System.out.println(zfile.getName());

Enumeration zList=zfile.entries();

ZipEntry ze=null;

byte[] buf=new byte[1024];

while(zList.hasMoreElements()){

//从ZipFile中得到一个ZipEntry

ze=(ZipEntry)zList.nextElement();

if(ze.isDirectory()){

continue;

}

//以ZipEntry为参数得到一个InputStream，并写到OutputStream中

OutputStream os=new BufferedOutputStream(new FileOutputStream(getRealFileName(outFileName, ze.getName())));

InputStream is=new BufferedInputStream(zfile.getInputStream(ze));

int readLen=0;

while ((readLen=is.read(buf, 0, 1024))!=-1) {

os.write(buf, 0, readLen);

}

is.close();

os.close();

System.out.println("Extracted: "+ze.getName());

}

zfile.close();

}

/**

* 取得指定目录下的所有文件列表，包括子目录.

*

* @param baseDir

* File 指定的目录

* @return 包含java.io.File的List

*/

private List getSubFiles(File baseDir) {

List ret = new ArrayList();

//File base=new File(baseDir);

File[] tmp = baseDir.listFiles();

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

if (tmp[i].isFile()) {

ret.add(tmp[i]);

}

if (tmp[i].isDirectory()) {

ret.addAll(getSubFiles(tmp[i]));

}

}

return ret;

}

/**

* 给定根目录，返回一个相对路径所对应的实际文件名.

*

* @param baseDir

* 指定根目录

* @param absFileName

* 相对路径名，来自于ZipEntry中的name

* @return java.io.File 实际的文件

*/

private File getRealFileName(String baseDir, String absFileName) {

String[] dirs = absFileName.split("/");

//System.out.println(dirs.length);

File ret = new File(baseDir);

//System.out.println(ret);

if (dirs.length > 1) {

for (int i = 0; i < dirs.length - 1; i++) {

ret = new File(ret, dirs[i]);

}

}

if (!ret.exists()) {

ret.mkdirs();

}

ret = new File(ret, dirs[dirs.length - 1]);

return ret;

}

/**

* 给定根目录，返回另一个文件名的相对路径，用于zip文件中的路径.

*

* @param baseDir

* java.lang.String 根目录

* @param realFileName

* java.io.File 实际的文件名

* @return 相对文件名

*/

private String getAbsFileName(String baseDir, File realFileName) {

File real = realFileName;

File base = new File(baseDir);

String ret = real.getName();

while (true) {

real = real.getParentFile();

if (real == null)

break;

if (real.equals(base))

break;

else {

ret = real.getName() + "/" + ret;

}

}

System.out.println("TTTTT" + ret);

return ret;

}

public void testReadZip() throws Exception{

String baseDir="d:\\temp\\zipout";

ZipFile zfile=new ZipFile("d:\\download\\src.zip");

System.out.println(zfile.getName());

Enumeration zList=zfile.entries();

ZipEntry ze=null;

byte[] buf=new byte[1024];

while(zList.hasMoreElements()){

//从ZipFile中得到一个ZipEntry

ze=(ZipEntry)zList.nextElement();

if(ze.isDirectory()){

continue;

}

//以ZipEntry为参数得到一个InputStream，并写到OutputStream中

OutputStream os=new BufferedOutputStream(new FileOutputStream(getRealFileName(baseDir, ze.getName())));

InputStream is=new BufferedInputStream(zfile.getInputStream(ze));

int readLen=0;

while ((readLen=is.read(buf, 0, 1024))!=-1) {

os.write(buf, 0, readLen);

}

is.close();

os.close();

System.out.println("Extracted: "+ze.getName());

}

zfile.close();

}

public static void main(String args[]){

ZipManager manager = new ZipManager();

try {

//manager.releaseZipToFile("c:\\test.zip","c:\\test");

manager.testReadZip();

}

catch (Exception e) {}

System.out.println("over");

}

}

已赞过

已踩过<

你对这个回答的评价是？

评论

收起