Java ZIP压缩和解压缩文件并兼容linux

Z时代
2024-01-10
分类：综合

java

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;

windows系统环境下

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.

linux环境下

ZipOutputStream的out.setEncoding("GBK");

ZipEntry的 entry.setUnixMode(644);

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.

    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);  
            Properties pro=System.getProperties();
            String osName=pro.getProperty("os.name");
            if("Linux".equals(osName)||"linux".equals(osName)){
                out.setEncoding("GBK");//设置文件名编码方式
            }else{
                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);  
        }  
    }

/*
     * inputFileName 输入一个文件夹
     * zipFileName 输出一个压缩文件夹
     */
    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());
            Properties pro=System.getProperties();
            String osName=pro.getProperty("os.name");
            if("Linux".equals(osName)||"linux".equals(osName)){
                entry.setUnixMode(644);
            }
            out.putNextEntry(entry);  
            int count;  
            byte data[] = new byte[8192];  
            while ((count = bis.read(data, 0, 8192)) != -1)  
            {  
                out.write(data, 0, count);  
            }  
            bis.close();  
        }  
        catch (Exception e)  
        {  
            throw new RuntimeException(e);  
        }  
    }

解压缩使用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);  
  }  
}