如何在Java中解压缩分割卷zip？ [英] How do you uncompress a split volume zip in Java?

问题描述

我需要重新组合一个100个部分的zip文件并提取内容。我尝试在输入流中简单地将zip卷连接在一起，但这不起作用。任何建议将不胜感激。

I need to reassemble a 100-part zip file and extract the content. I tried simply concatenating the zip volumes together in an input stream but that does not work. Any suggestions would be appreciated.

谢谢。

推荐答案

这是您可以从中开始的代码。它从多卷zip存档中提取单个文件条目：

Here is the code you can start from. It extracts a single file entry from the multivolume zip archive:

package org.test.zip;

import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.SequenceInputStream;
import java.util.Arrays;
import java.util.Collections;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class Main {

    public static void main(String[] args) throws IOException {
        ZipInputStream is = new ZipInputStream(new SequenceInputStream(Collections.enumeration(
            Arrays.asList(new FileInputStream("test.zip.001"), new FileInputStream("test.zip.002"), new FileInputStream("test.zip.003")))));
        try {
            for(ZipEntry entry = null; (entry = is.getNextEntry()) != null; ) {
                OutputStream os = new BufferedOutputStream(new FileOutputStream(entry.getName()));
                try {
                    final int bufferSize = 1024;
                    byte[] buffer = new byte[bufferSize];
                    for(int readBytes = -1; (readBytes = is.read(buffer, 0, bufferSize)) > -1; ) {
                        os.write(buffer, 0, readBytes);
                    }
                    os.flush();
                } finally {
                    os.close();
                }
            }
        } finally {
            is.close();
        }
    }
}

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