如何使用UTF-8编码打开java程序生成的zip文件

Question

我们的产品有导出功能，使用ZipOutputStream来压缩目录；但是，当您尝试压缩包含带有中文或日文字符的文件名的目录时，导出无法正常工作。由于某种原因，压缩文件中的新文件的名称不同。以下是我们的压缩代码的示例：

ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
out.setEncoding("UTF-8");
//program to add directory to zip 
//program add/create file to zip
out.close();

我的导入算法也是用 Java 构建的，可以正确导入压缩文件，即使文件/目录名称中包含中文/日文字符。

 Zipfile zipfile = new ZipFile(zipPath, "UTF-8");
 Enumeration e = zipFile.getEntries();
 while (e.hasMoreElements()) {
 entry = (ZipEntry) e.nextElement();
 String name = entry.getName();
         ....

zip 软件的程序是否在解压缩 UTF-8 编码文件时遇到问题，或者是否需要一些特殊的东西来创建可以由使用 utf-8 编码的现有软件轻松使用的 zip 文件？

---

我写了一个示例程序：

package ZipFile;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

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

public class ZipFolder{
public static void main(String[] a) throws Exception
{
String srcFolder = "D:/9.4_work/openscript_repo/中文124.All/中文";
String destZipFile = "D:/Eclipse_Projects/OpenScriptDebuggingProject/src/ZipFile/demo.zip";
zipFolder(srcFolder, destZipFile);
}

static public void zipFolder(String srcFolder, String destZipFile) throws Exception
{
    ZipOutputStream zip = null;
    FileOutputStream fileWriter = null;

    fileWriter = new FileOutputStream(destZipFile);
    zip = new ZipOutputStream(fileWriter);
    zip.setEncoding("UTF-8");
    // using GBK encoding, the chinese name can be correctly displayed when unzip
    // zip.setEncoding("GBK");

    addFolderToZip("", srcFolder, zip);
    zip.flush();
    zip.close();
}

static private void addFileToZip(String path, String srcFile, ZipOutputStream zip) throws Exception
{

    File folder = new File(srcFile);
    if (folder.isDirectory()) {
        addFolderToZip(path, srcFile, zip);
    }
    else {
        byte[] buf = new byte[1024];
        int len;
        FileInputStream in = new FileInputStream(srcFile);
        zip.putNextEntry(new ZipEntry(path + "/" + folder.getName()));
        while ((len = in.read(buf)) > 0) {
            zip.write(buf, 0, len);
        }
    }
}

static private void addFolderToZip(String path, String srcFolder, ZipOutputStream zip) throws Exception
{
    File folder = new File(srcFolder);

    for (String fileName : folder.list()) {
        if (path.equals("")) {
            addFileToZip(folder.getName(), srcFolder + "/" + fileName, zip);
        }
        else {
            addFileToZip(path + "/" + folder.getName(), srcFolder + "/" + fileName, zip);
        }
    }
}

}

Answer 1

这里的最佳答案可能会回答您的问题；不幸的是，它似乎表明 Zip 格式实际上不允许创建在任何计算机上正确显示文件名的 Zip 文件：

https://superuser.com/questions/60379/linux-zip-tgz-filenames-encoding-problem

我希望当您将编码设置为GBK，因为这是系统的默认编码，因此 7zip 对其打开的所有 zip 文件都使用该编码。

这表明 rar 和 7z 格式有更好的支持。

我发现了一篇专门介绍 UTF-8 in zips with Java 的博客文章。这表明存在更新版本的 ZIP 规范，当前版本的 Java 可能不会创建该规范，但 Java 7 将会创建。我不知道 Apache 类是否也使用这个。

http://blogs.oracle.com/xuemingshen/entry/non_utf_8_encoding_in

Answer 2

以下实用程序类允许您使用 GZIP 压缩算法来压缩和解压缩字符串。例如，如果您想在数据库中保存长字符串，这会很有用。

import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;
import java.util.zip.GZIPOutputStream;
import java.util.zip.GZIPInputStream;


public class GzipStringUtil {


    public static byte[] compressString(String uncompressedString) throws IllegalArgumentException, IllegalStateException {
        if (uncompressedString == null) {
            throw new IllegalArgumentException("The uncompressed string specified was null.");
        }
        try {
            byte[] utfEncodedBytes = uncompressedString.getBytes("UTF-8");
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            GZIPOutputStream gzipOutputStream = new GZIPOutputStream(baos);
            gzipOutputStream.write(utfEncodedBytes);
            gzipOutputStream.finish();
            gzipOutputStream.close();
            return baos.toByteArray();
        }
        catch (Exception e) {
            throw new IllegalStateException("GZIP compression failed: " + e, e);
        }
    }


    public static String uncompressString(byte[] compressedString) throws IllegalArgumentException, IllegalStateException {
        if (compressedString == null) {
            throw new IllegalArgumentException("The compressed string specified was null.");
        }
        try {
            ByteArrayInputStream bais = new ByteArrayInputStream(compressedString);
            GZIPInputStream gzipInputStream = new GZIPInputStream(bais);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            for (int value = 0; value != -1;) {
                value = gzipInputStream.read();
                if (value != -1) {
                    baos.write(value);
                }
            }
            gzipInputStream.close();
            baos.close();
            return new String(baos.toByteArray(), "UTF-8");
        }
        catch (Exception e) {
            throw new IllegalStateException("GZIP uncompression failed: " + e, e);
        }
    }
}

这是一个测试用例，提供了上述类的使用示例：

public class GzipStringUtilTest extends TestCase {

    public void testGzipStringUtil() {
        String input = "This is a test. This is a test. This is a test. This is a test. This is a test.";
        System.out.println("Input:        [" + input + "]");
        byte[] compressed = GzipStringUtil.compressString(input);
        System.out.println("Compressed:   " + Arrays.toString(compressed));
        System.out.println("-> Compressed input string of length " + input.length() + " to " + compressed.length + " bytes");
        String uncompressed = GzipStringUtil.uncompressString(compressed);
        System.out.println("Uncompressed: [" + uncompressed + "]");
        assertEquals("The uncompressed string [" + uncompressed + "] unexpectedly does not match the input string [" + input + "]", input, uncompressed);
        System.out.println("The input was compressed and uncompressed successfully, and the input matches uncompressed output.");
    }
}