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); else dirname = 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; } } }