java解压缩ZIP

来源：互联网发布：php 数组取值编辑：程序博客网时间：2024/05/21 10:03

今天做了个东西，用到java中的解ZIP压缩功能，特写下来。

首先应该构造文件输入流，如下：

FileInputStream fis = new FileInputStream("文件路径");
ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));

构造ZIP目录类和文件输出流

ZipEntry entry;

BufferedOutputStream dest = null;

然后读取ZIP文件，看包里有几个文件，然后在建立这些文件（如果压缩包压缩的是个文件夹，要首先建立这个文件夹，然后在文件夹下建立相应的文件）

entry = zis.getNextEntry();
File folder = new File(pth+ entry.getName());
folder.mkdir();

while ( (entry = zis.getNextEntry()) != null)
{

File file = new File(path+ entry.getName());

再构建文件输出流，然后通过缓存输出流进行写文件

byte data[] = new byte[BUFFER];

FileOutputStream fos = new FileOutputStream(path + "/" + entry.getName());

                dest = new BufferedOutputStream(fos, BUFFER);
                while ( (count = zis.read(data)) != -1)
                {
                    dest.write(data, 0, count);
                }
                dest.flush();
                dest.close();
                fos.close();
详细的代码如下所示：

package net.action;

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

public class Test
{
static final int BUFFER = 2048;

private static int flag = 0;

private static String path = "C:/temp/";

    public static void main(String argv[])
    {
        try
        {
            BufferedOutputStream dest = null;
            //构造文件输入流
            FileInputStream fis = new FileInputStream("C://temp//20070530.zip");
            ZipInputStream zis = new ZipInputStream(new BufferedInputStream(fis));

            ZipEntry entry;

            entry = zis.getNextEntry();
            File folder = new File(path + entry.getName());
            folder.mkdir();

            while ( (entry = zis.getNextEntry()) != null)
            {
                System.out.println("Extracting: " + entry);

File file = new File(path + entry.getName());

int count;
byte data[] = new byte[BUFFER];

FileOutputStream fos = new FileOutputStream(path + entry.getName());

                dest = new BufferedOutputStream(fos, BUFFER);
                while ( (count = zis.read(data)) != -1)
                {
                    dest.write(data, 0, count);
                }
                dest.flush();
                dest.close();
                fos.close();

            }
            zis.close();
            fis.close();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}