如何在Java中递归解压缩文件？
如何在Java中递归解压缩文件？
提问于 2009-06-11 14:52:59
我有一个zip文件，其中包含一些其他的zip文件。
例如，邮件文件是abc.zip，它包含xyz.zip、class1.java、class2.java。xyz.zip包含文件class3.java和class4.java。
所以我需要使用Java将压缩文件解压到一个应该包含class1.java、class2.java、class3.java和class4.java的文件夹中。
回答 8
Stack Overflow用户
发布于 2011-08-18 22:12:58
警告，这里的代码对于可信的压缩文件是正常的，在写入之前没有路径验证，如果你使用它来放空未知客户端上传的压缩文件，这可能会导致zip-slip-vulnerability中描述的安全漏洞。
此解决方案与之前发布的解决方案非常相似，但此解决方案在解压时重新创建了正确的文件夹结构。
public static void extractFolder(String zipFile) throws IOException {
int buffer = 2048;
File file = new File(zipFile);
try (ZipFile zip = new ZipFile(file)) {
String newPath = zipFile.substring(0, zipFile.length() - 4);
new File(newPath).mkdir();
Enumeration<? extends ZipEntry> zipFileEntries = zip.entries();
// Process each entry
while (zipFileEntries.hasMoreElements()) {
// grab a zip file entry
ZipEntry entry = zipFileEntries.nextElement();
String currentEntry = entry.getName();
File destFile = new File(newPath, currentEntry);
File destinationParent = destFile.getParentFile();
// create the parent directory structure if needed
destinationParent.mkdirs();
if (!entry.isDirectory()) {
BufferedInputStream is = new BufferedInputStream(zip.getInputStream(entry));
int currentByte;
// establish buffer for writing file
byte[] data = new byte[buffer];
// write the current file to disk
FileOutputStream fos = new FileOutputStream(destFile);
try (BufferedOutputStream dest = new BufferedOutputStream(fos, buffer)) {
// read and write until last byte is encountered
while ((currentByte = is.read(data, 0, buffer)) != -1) {
dest.write(data, 0, currentByte);
}
dest.flush();
is.close();
}
}
if (currentEntry.endsWith(".zip")) {
// found a zip file, try to open
extractFolder(destFile.getAbsolutePath());
}
}
}}
Stack Overflow用户
发布于 2009-06-11 15:14:55
这是一些未经测试的代码，基于我解压后的一些旧代码。
public void doUnzip(String inputZip, String destinationDirectory)
throws IOException {
int BUFFER = 2048;
List zipFiles = new ArrayList();
File sourceZipFile = new File(inputZip);
File unzipDestinationDirectory = new File(destinationDirectory);
unzipDestinationDirectory.mkdir();
ZipFile zipFile;
// Open Zip file for reading
zipFile = new ZipFile(sourceZipFile, ZipFile.OPEN_READ);
// Create an enumeration of the entries in the zip file
Enumeration zipFileEntries = zipFile.entries();
// Process each entry
while (zipFileEntries.hasMoreElements()) {
// grab a zip file entry
ZipEntry entry = (ZipEntry) zipFileEntries.nextElement();
String currentEntry = entry.getName();
File destFile = new File(unzipDestinationDirectory, currentEntry);
destFile = new File(unzipDestinationDirectory, destFile.getName());
if (currentEntry.endsWith(".zip")) {
zipFiles.add(destFile.getAbsolutePath());
}
// grab file's parent directory structure
File destinationParent = destFile.getParentFile();
// create the parent directory structure if needed
destinationParent.mkdirs();
try {
// extract file if not a directory
if (!entry.isDirectory()) {
BufferedInputStream is =
new BufferedInputStream(zipFile.getInputStream(entry));
int currentByte;
// establish buffer for writing file
byte data[] = new byte[BUFFER];
// write the current file to disk
FileOutputStream fos = new FileOutputStream(destFile);
BufferedOutputStream dest =
new BufferedOutputStream(fos, BUFFER);
// read and write until last byte is encountered
while ((currentByte = is.read(data, 0, BUFFER)) != -1) {
dest.write(data, 0, currentByte);
}
dest.flush();
dest.close();
is.close();
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
zipFile.close();
for (Iterator iter = zipFiles.iterator(); iter.hasNext();) {
String zipName = (String)iter.next();
doUnzip(
zipName,
destinationDirectory +
File.separatorChar +
zipName.substring(0,zipName.lastIndexOf(".zip"))
);
}
}Stack Overflow用户
发布于 2009-06-12 22:03:59
我使用ca.anderson4，删除列表zipFiles，并稍微重写了一下，这是我得到的结果：
public class Unzip {
public void unzip(String zipFile) throws ZipException,
IOException {
System.out.println(zipFile);;
int BUFFER = 2048;
File file = new File(zipFile);
ZipFile zip = new ZipFile(file);
String newPath = zipFile.substring(0, zipFile.length() - 4);
new File(newPath).mkdir();
Enumeration zipFileEntries = zip.entries();
// Process each entry
while (zipFileEntries.hasMoreElements()) {
// grab a zip file entry
ZipEntry entry = (ZipEntry) zipFileEntries.nextElement();
String currentEntry = entry.getName();
File destFile = new File(newPath, currentEntry);
destFile = new File(newPath, destFile.getName());
File destinationParent = destFile.getParentFile();
// create the parent directory structure if needed
destinationParent.mkdirs();
if (!entry.isDirectory()) {
BufferedInputStream is = new BufferedInputStream(zip
.getInputStream(entry));
int currentByte;
// establish buffer for writing file
byte data[] = new byte[BUFFER];
// write the current file to disk
FileOutputStream fos = new FileOutputStream(destFile);
BufferedOutputStream dest = new BufferedOutputStream(fos,
BUFFER);
// read and write until last byte is encountered
while ((currentByte = is.read(data, 0, BUFFER)) != -1) {
dest.write(data, 0, currentByte);
}
dest.flush();
dest.close();
is.close();
}
if (currentEntry.endsWith(".zip")) {
// found a zip file, try to open
unzip(destFile.getAbsolutePath());
}
}
}
public static void main(String[] args) {
Unzip unzipper=new Unzip();
try {
unzipper.unzip("test/test.zip");
} catch (ZipException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}我测试了一下，它正常工作。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/981578
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