java文件整理(三)--文件解压缩类

package com.tw.file.util;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.util.zip.ZipEntry;import java.util.zip.ZipException;import java.util.zip.ZipFile;import java.util.zip.ZipInputStream;/** * 文件解压缩类 * @author tw * */public class ZipUtils {private static final String tt="";/** * 主方法 * @param arg * @throws Exception */public static void main(String arg[])throws Exception{ZipUtils.unZip_java("F:/POIDemo/uedit32c.zip");//测试OK}/** * <p>文件解缩方法2 java本身自带的解压包。 * 只会解压到当前目录下。</p> * @param zipFileName 要解压文件的全路径 */ public static void unZip_java(String zipFileName){File infile = new File(zipFileName);try {// 检查是否是ZIP文件ZipFile zip = new ZipFile(infile);zip.close();// 建立与目标文件的输入连接ZipInputStream in = new ZipInputStream(new FileInputStream(infile));ZipEntry file = in.getNextEntry();int i = infile.getAbsolutePath().lastIndexOf('.');String dirname = new String();if (i != -1)dirname = infile.getAbsolutePath().substring(0, i);elsedirname = infile.getAbsolutePath();File newdir = new File(dirname);newdir.mkdir();byte[] c = new byte[1024];int len;int slen;while (file != null) {i = make8859toGB(file.getName()).replace('/', '//').lastIndexOf('//');if (i != -1) {File dirs = new File(dirname+ File.separator+ make8859toGB(file.getName()).replace('/', '//').substring(0, i));dirs.mkdirs();dirs = null;}System.out.print("Extract "+ make8859toGB(file.getName()).replace('/', '//')+ " ........ ");if (file.isDirectory()) {File dirs = new File(make8859toGB(file.getName()).replace('/', '//'));dirs.mkdir();dirs = null;} else {FileOutputStream out = new FileOutputStream(dirname+ File.separator+ make8859toGB(file.getName()).replace('/', '//'));while ((slen = in.read(c, 0, c.length)) != -1)out.write(c, 0, slen);out.close();}System.out.print("O.K./n");file = in.getNextEntry();}in.close();} catch (ZipException zipe) {System.out.println(infile.getName() + "不是一个ZIP文件！");} catch (IOException ioe) {System.out.println("读取文件时错误！");} catch (Exception i) {System.out.println("over");} }public static String make8859toGB(String str) {try {String str8859 = new String(str.getBytes("8859_1"), "GB2312");return str8859;} catch (UnsupportedEncodingException ioe) {return str;}}}