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2009年5月 (1)

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文件夾的壓縮與解壓

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package homeWork.first;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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import java.util.zip.ZipOutputStream;
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/**
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* 壓縮與解壓類
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*
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* @author mysileng
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*
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*/
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public class ZipDemo {
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/**
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* 壓縮單個文件
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*
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* @param fileIn
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* @param fileout
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*/
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public void singleFileZip(File fileIn, File fileout) {
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FileInputStream in = null;
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FileOutputStream out = null;
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ZipOutputStream zip = null;
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try {
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in = new FileInputStream(fileIn);
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out = new FileOutputStream(fileout);
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zip = new ZipOutputStream(out);
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byte[] b = new byte[1024];
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ZipEntry entry = new ZipEntry(fileIn.getName());
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zip.putNextEntry(entry);
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while (in.read(b) != -1) {
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zip.write(b);
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}
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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try {
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zip.close();
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out.close();
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in.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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/**
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* 壓縮文件夾
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*
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* @param befor文件夾壓縮之前的路徑
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* @param after文件夾壓縮之后的路徑
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*/
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public void mirsZip(String befor, String after) {
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File fileIn = new File(befor);
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File fileOut = new File(after);
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FileOutputStream out = null;
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ZipOutputStream zip = null;
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String base = "";
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try {
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out = new FileOutputStream(fileOut);
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zip = new ZipOutputStream(out);
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zip(zip, fileIn, base);
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} finally {
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try {
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zip.close();
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out.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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private void zip(ZipOutputStream zip, File fileIn, String base) {
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if (fileIn.isDirectory()) {
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File[] list = fileIn.listFiles();
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base = base + fileIn.getName() + "/";// 在壓縮文件里建立文件夾
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ZipEntry entry = new ZipEntry(base);
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try {
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zip.putNextEntry(entry);
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} catch (IOException e) {
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e.printStackTrace();
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}
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for (int i = 0; i < list.length; i++) {
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zip(zip, list[i], base);
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}
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} else {
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FileInputStream in = null;
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try {
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in = new FileInputStream(fileIn);
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byte[] b = new byte[1024];
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ZipEntry entry = new ZipEntry(base + fileIn.getName());
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zip.putNextEntry(entry);
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while (in.read(b) != -1) {
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zip.write(b);
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}
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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/**
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* 解壓
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*
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* @param befor
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* @param after
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*/
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public void getZip(String befor, String after) {
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File fileIn = new File(befor);
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FileInputStream in = null;
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FileOutputStream out = null;
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ZipInputStream zip = null;
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try {
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in = new FileInputStream(fileIn);
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zip = new ZipInputStream(in);
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ZipEntry entry = null;
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while ((entry = zip.getNextEntry()) != null) {
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if (entry.isDirectory()) {// 判斷是文件夾還是文件
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new File(after + entry.getName()).mkdirs();// 如果是文件夾就建立
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} else {
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out = new FileOutputStream(// 如果是文件就讀出來
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new File(after + entry.getName()));
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byte[] b = new byte[1024];
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while (zip.read(b) != -1) {
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out.write(b);
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}
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out.close();
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}
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}
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} catch (FileNotFoundException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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try {
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zip.close();
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in.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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}
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posted on 2009-05-23 01:18 鑫龍閱讀(89) 評論(0) 編輯收藏

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