用Java程序实现解压缩文件

package com.huawei.globe;

import java.util.zip.*;
import java.io.*;

public class Compress {

public Compress() {

}

// 压缩目录下的文件
public void compress(String zipFileName, String inputFile) throws Exception {
compress(zipFileName, new File(inputFile));
}

// 压缩文件
public void compress(String zipFileName, File inputFile) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
zipFileName));
compress(out, inputFile, "");
System.out.println("压缩成功!");
out.close();
}

public void compress(ZipOutputStream out, File f, String base)
throws Exception {
System.out.println("正在压缩 " + f.getName());
if (f.isDirectory()) {
File[] fl = f.listFiles();
out.putNextEntry(new ZipEntry(base + "/"));
base = base.length() == 0 ? "" : base + "/";
for (int i = 0; i < fl.length; i++) {
compress(out, fl[i], base + fl[i].getName());
}
} else {
out.putNextEntry(new ZipEntry(base));
FileInputStream in = new FileInputStream(f);
int b;
while ((b = in.read()) != -1)
out.write(b);
in.close();
}
}

// 解压缩文件
public void upCompress(String zipFileName, String outputDirectory)
throws Exception {
ZipInputStream in = new ZipInputStream(new FileInputStream(zipFileName));
ZipEntry z;
while ((z = in.getNextEntry()) != null) {
System.out.println("正在解压 " + z.getName());
if (z.isDirectory()) {
String name = z.getName();
name = name.substring(0, name.length() - 1);
File f = new File(outputDirectory + File.separator + name);
f.mkdir();
System.out.println("创建目录 " + outputDirectory + File.separator
+ name);
} else {
File f = new File(outputDirectory + File.separator
+ z.getName());
f.createNewFile();
FileOutputStream out = new FileOutputStream(f);
int b;
while ((b = in.read()) != -1)
out.write(b);
out.close();
}
}
in.close();
}

public static void main(String[] args) {
try {
Compress t = new Compress();
t.compress("D://new.zip", "D://WEB开发分类总结//zhengzebiaodashi");
t.upCompress("d://ddd//quanleilei.jar", "d://ddd//");
} catch (Exception e) {
e.printStackTrace(System.out);
}
}
}