java 压缩解压文件 无乱码



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文章转载地址【Java ZIP压缩和解压缩文件(解决中文文件名乱码问题)】http://www.tuicool.com/articles/V7BBvy

JDK中自带的ZipOutputStream在压缩文件时,如果文件名中有中文,则压缩后的

zip文件打开时发现中文文件名变成乱码.

解决的方法是使用apache-ant-zip.jar包(见附件)中的ZipOutputStream和ZipEntry.

即,导入类:

import org.apache.tools.zip.ZipEntry; 

import org.apache.tools.zip.ZipOutputStream;

并且注意,压缩之前调用 ZipOutputStream的out.setEncoding(System.getProperty("sun.jnu.encoding")); 方法,

系统参数sun.jnu.encoding表示获取当前系统中的文件名的编码方式.这里将ZipOutputStream的文件名编码方式

设置成系统的文件名编码方式.

解压时,直接使用JDK原来的ZipInputStream即可.

但是有个 需要注意 的地方是,在读取ZIP文件之前,需要设置:

System.setProperty("sun.zip.encoding", System.getProperty("sun.jnu.encoding"));

将系统的ZIP编码格式设置为系统文件名编码方式,否则解压时报异常.

(网上,还有修改ZipInputStream源码的方式貌似太麻烦了,参考:http://zwllxs.iteye.com/blog/871260)

ZIP代码参考http://szhnet.iteye.com/blog/199059,有修改.

package io;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.CRC32;
import java.util.zip.CheckedOutputStream;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;

public class
Zip{

  static final
int BUFFER = 8192;

  public Zip()

  {

  }

  private static
void compress(File file, ZipOutputStream out, String basedir)

  {

    /* 判断是目录还是文件 */

    if (file.isDirectory())

    {

      // System.out.println("压缩：" + basedir + file.getName());

      compressDirectory(file, out, basedir);

    }

    else

    {

      // System.out.println("压缩：" + basedir + file.getName());

      compressFile(file, out, basedir);

    }

  }

  /** 压缩一个目录 */

  private static
void compressDirectory(File dir, ZipOutputStream out, String basedir)

  {

    if (!dir.exists()) return;

    File[] files = dir.listFiles();

    for (int i =
0; i < files.length; i++)

    {

      /* 递归 */

      compress(files[i], out, basedir + dir.getName() + "/");

    }

  }

  /** 压缩一个文件 */

  private static
void compressFile(File file, ZipOutputStream out, String basedir)

  {

    if (!file.exists())

    {

      return;

    }

    try

    {

      BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));

      ZipEntry entry = new ZipEntry(basedir + file.getName());

      out.putNextEntry(entry);

      int count;

      byte data[] = new
byte[BUFFER];

      while ((count = bis.read(data,
0, BUFFER)) != -1)

      {

        out.write(data, 0, count);

      }

      bis.close();

    }

    catch (Exception e)

    {

      throw new RuntimeException(e);

    }

  }

  public static
void zip(String srcPathName, String zipFileName)

  {

    File file = new File(srcPathName);

    File zipFile = new File(zipFileName);

    if (!file.exists()) throw
new RuntimeException(srcPathName +
"不存在！");

    try

    {

      FileOutputStream fileOutputStream = new FileOutputStream(zipFile);

      CheckedOutputStream cos = new CheckedOutputStream(fileOutputStream,
new CRC32());

      ZipOutputStream out = new ZipOutputStream(cos);

      out.setEncoding(System.getProperty("sun.jnu.encoding"));//设置文件名编码方式

      String basedir = "";

      compress(file, out, basedir);

      out.close();

    }

    catch (Exception e)

    {

      throw new RuntimeException(e);

    }

  }

  public static
void main(String[] args)

  {

    Zip.zip("D:\\D\\dll", "D:\\D\\dll.zip");

  }

}

UnZip代码:

package io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class
UnZip{

  public static
void unzip(String zipFilePath, String destDir)

  {

    System.setProperty("sun.zip.encoding", System.getProperty("sun.jnu.encoding"));
//防止文件名中有中文时出错

    //System.out.println(System.getProperty("sun.zip.encoding")); //ZIP编码方式

    //System.out.println(System.getProperty("sun.jnu.encoding")); //当前文件编码方式

    //System.out.println(System.getProperty("file.encoding")); //这个是当前文件内容编码方式

   

    File dir = new File(destDir);

    // create output directory if it doesn't exist

    if (!dir.exists()) dir.mkdirs();

    FileInputStream fis;

    // buffer for read and write data to file

    byte[] buffer = new
byte[1024];

    try

    {

      fis = new FileInputStream(zipFilePath);

      ZipInputStream zis = new ZipInputStream(fis);

      ZipEntry ze = zis.getNextEntry();

      while (ze != null)

      {

        String fileName = ze.getName();

        File newFile = new File(destDir + File.separator + fileName);

        //System.out.println("Unzipping to " + newFile.getAbsolutePath());

        // create directories for sub directories in zip

        new File(newFile.getParent()).mkdirs();

        FileOutputStream fos = new FileOutputStream(newFile);

        int len;

        while ((len = zis.read(buffer)) >
0)

        {

          fos.write(buffer, 0, len);

        }

        fos.close();

        // close this ZipEntry

        zis.closeEntry();

        ze = zis.getNextEntry();

      }

      // close last ZipEntry

      zis.closeEntry();

      zis.close();

      fis.close();

    }

    catch (IOException e)

    {

      e.printStackTrace();

    }

  }

  public static
void main(String[] args)

  {

    String zipFilePath = "D:\\D\\dll.zip";

    String destDir = "D:\\D\\dll_zip";

    UnZip.unzip(zipFilePath, destDir);

  }

}package io;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

public class UnZip

{

public static void unzip(String zipFilePath, String destDir)

{

System.setProperty("sun.zip.encoding", System.getProperty("sun.jnu.encoding")); //防止文件名中有中文时出错

//System.out.println(System.getProperty("sun.zip.encoding")); //ZIP编码方式

//System.out.println(System.getProperty("sun.jnu.encoding")); //当前文件编码方式

//System.out.println(System.getProperty("file.encoding")); //这个是当前文件内容编码方式

File dir = new File(destDir);

// create output directory if it doesn't exist

if (!dir.exists()) dir.mkdirs();

FileInputStream fis;

// buffer for read and write data to file

byte[] buffer = new byte[1024];

try

{

fis = new FileInputStream(zipFilePath);

ZipInputStream zis = new ZipInputStream(fis);

ZipEntry ze = zis.getNextEntry();

while (ze != null)

{

String fileName = ze.getName();

File newFile = new File(destDir + File.separator + fileName);

//System.out.println("Unzipping to " + newFile.getAbsolutePath());

// create directories for sub directories in zip

new File(newFile.getParent()).mkdirs();

FileOutputStream fos = new FileOutputStream(newFile);

int len;

while ((len = zis.read(buffer)) > 0)

{

fos.write(buffer, 0, len);

}

fos.close();

// close this ZipEntry

zis.closeEntry();

ze = zis.getNextEntry();

}

// close last ZipEntry

zis.closeEntry();

zis.close();

fis.close();

}

catch (IOException e)

{

e.printStackTrace();

}

}

public static void main(String[] args)

{

String zipFilePath = "D:\\D\\dll.zip";

String destDir = "D:\\D\\dll_zip";

UnZip.unzip(zipFilePath, destDir);

}

}