Java压缩解压应用.doc

Java解压与压缩应用在Web应用中，可用到批量附件上传，我们可以通过flash控件来实现，当然也可以通过压缩解压来实现。下面应用示例介绍压缩与解压的实现过程。供大家参考学习1. 依赖于ant-1.7.1.jar，把此jar导入到应用的工程项目中:2. 代码示例:package com.lrm.study.zip;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import org.apache.tools.zip.ZipOutputStream;/* * Java解压与压缩文件 java提供的java.util.zip.*.对中文不支持.但可能通过ZipOutputStream 来解决这个问题. * 下面就是一个简单的例子,注 需要导入ant.jar支持包 * * author lrm * */public class JavaAntZipApp /* * Create on Nov 3, 2009 by lrm */public static void main(String args) / TODO Auto-generated method stubJavaAntZipApp jaza = new JavaAntZipApp();String inputFileName = E:/我的收藏/JAVA APLLICATION/Java压缩与解压应用;/ 要压缩的文件名try / 压缩/ jaza.zip(inputFileName);/ 解压jaza.unZip(D:test生化试剂报价表.zip, D:解压测试目录); catch (Exception e) / TODO Auto-generated catch blocke.printStackTrace();/*压缩* */public void zip(String inputFileName) throws Exception String zipFileName = d:批量打包测试.zip;/ 打包后文件名字System.out.println(zipFileName);zip(zipFileName, new File(inputFileName);private void zip(String zipFileName, File inputFile)ZipOutputStream out =null;try out = new ZipOutputStream(new FileOutputStream(zipFileName);zip(out, inputFile, ); catch (FileNotFoundException e) / TODO Auto-generated catch blocke.printStackTrace();finallytry out.close(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();System.out.println(zip done);private void zip(ZipOutputStream out, File f, String base) FileInputStream in = null;if (f.isDirectory() File fl = f.listFiles();System.out.println(新增目录元素 + base + /);try out.putNextEntry(new org.apache.tools.zip.ZipEntry(base + /);base = base.length() = 0 ? : base + /;for (int i = 0; i fl.length; i+) zip(out, fli, base + fli.getName(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); else System.out.println(新增普通文件元素 + base);try out.putNextEntry(new org.apache.tools.zip.ZipEntry(base);in = new FileInputStream(f);int b;while (b = in.read() != -1) out.write(b); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace(); finally try in.close(); catch (IOException e) / TODO Auto-generated catch blocke.printStackTrace();/*解压* */private void createDirectory(String directory, String subDirectory) String dir;File fl = new File(directory);try / 如果解压文件基本目录结构不存在,新建if (subDirectory = & fl.exists() != true) / System.out.println(*创建基本目录结构*+directory);fl.mkdir();/ 主要创建子目录else if (subDirectory != ) dir = subDirectory.replace(, /).split(/);for (int i = 0; i dir.length; i+) File subFile = new File(directory + File.separator + diri);if (subFile.exists() = false) / System.out.println(*创建子目录*+directory +/ File.separator + diri);subFile.mkdir();directory += File.separator + diri; catch (Exception ex) System.out.println(ex.getMessage();/* * param zipFileName * 压缩文件名及路径; outputDirectory 被解压到的文件目录 * Create on Nov 3, 2009 by lrm */public void unZip(String zipFileName, String outputDirectory)throws Exception InputStream in = null;FileOutputStream out = null;try org.apache.tools.zip.ZipFile zipFile = new org.apache.tools.zip.ZipFile(zipFileName);java.util.Enumeration e = zipFile.getEntries();org.apache.tools.zip.ZipEntry zipEntry = null;createDirectory(outputDirectory, );while (e.hasMoreElements() zipEntry = (org.apache.tools.zip.ZipEntry) e.nextElement();System.out.println(= 解压 = + zipEntry.getName();/ 判断是否为一个文件夹if (zipEntry.isDirectory() String name = zipEntry.getName().trim();/ 因为后面带有一个/,所有要去掉name = name.substring(0, name.length() - 1);File f = new File(outputDirectory + File.separator + name);if (!f.exists() f.mkdir();/ System.out.println(*创建根目录* +/ outputDirectory + File.separator + name); else String fileName = zipEntry.getName();fileName = fileName.replace(, /);/ 判断子文件是否带有目录,有创建,没有写文件if (fileName.indexOf(/) != -1) createDirectory(outputDirectory, fileName.substring(0,fileName.lastIndexOf(/);fileName = fileName.substring(fileName.lastIndexOf(/) + 1);File f = new File(outputDirectory + File.separator+ zipEntry.getName();f.createNewFile();in = zipFile.getInputStream(zipEntry);out = new