Java ZIP压缩和解压缩文件(解决中文文件名乱码问题

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);
}

}