解压缩zip
1.使用hutool工具包中ZipUtil工具类
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
<version>5.7.2</version>
</dependency>
使用比较简单,下面只是其中一种用法(当然还有其他的使用方法,请自行查看源码):
ZipUtil.unzip(f.getAbsolutePath(), Charset.forName("GBK"));
参数是压缩包路径和编码,使用GBK
是为了解决中文解压缩乱码的问题,测试使用了其他字符集,解压缩后中文都是乱码。
2.使用zip4j工具包
<dependency>
<groupId>net.lingala.zip4j</groupId>
<artifactId>zip4j</artifactId>
<version>2.9.1</version>
</dependency>
使用比hutool工具包稍复杂一点:
ZipFile zipFile = new ZipFile(f.getAbsolutePath());
zipFile.setCharset(Charset.forName("GBK"));
File zdir = new File(f.getAbsolutePath().substring(0, f.getAbsolutePath().indexOf(".")));
if (!zdir.isDirectory()) {
zdir.mkdir();
}
try {
zipFile.extractAll(zdir.getAbsolutePath());
} catch (ZipException e) {
e.printStackTrace();
}
字符集同样使用GBK
,否则解压后中文也是乱码。zipFile.extractAll
是解压到指定文件夹。
解压缩rar
1.使用junrar工具包
<dependency>
<groupId>com.github.junrar</groupId>
<artifactId>junrar</artifactId>
<version>7.4.0</version>
</dependency>
调用方式:
File zdir = new File(f.getAbsolutePath().substring(0, f.getAbsolutePath().indexOf(".")));
if (!zdir.isDirectory()) {
zdir.mkdir();
}
try {
Junrar.extract(f.getAbsolutePath(), zdir.getAbsolutePath());
} catch (IOException e) {
e.printStackTrace();
} catch (RarException e) {
e.printStackTrace();
}
运行测试,居然报错:
23:31:45.233 [main] WARN com.github.junrar.Archive - Support for rar version 5 is not yet implemented!
23:31:45.247 [main] WARN com.github.junrar.Archive - exception in archive constructor maybe file is encrypted, corrupt or support not yet implemented
com.github.junrar.exception.UnsupportedRarV5Exception: null
junrar不支持rar5的解压缩!!!我曹,无情!!!
继续百度一番,没有找到其他方案,晚上在简书上,努力翻找,找到了新的解决方案,如下!
2.使用sevenzipjbinding
<dependency>
<groupId>net.sf.sevenzipjbinding</groupId>
<artifactId>sevenzipjbinding</artifactId>
<version>16.02-2.01</version>
</dependency>
<dependency>
<groupId>net.sf.sevenzipjbinding</groupId>
<artifactId>sevenzipjbinding-all-platforms</artifactId>
<version>16.02-2.01</version>
</dependency>
原文作者说,某些情况,由于文件编码问题,可能会出现乱码的情况,但是API上没有参数可以设置编码。但个人示例测试暂时没有发现乱码问题,贴下示例代码:
try {
// f - 压缩文件
RandomAccessFile randomAccessFile = new RandomAccessFile(f.getAbsolutePath(), "r");
IInArchive archive = SevenZip.openInArchive(ArchiveFormat.RAR5, new RandomAccessFileInStream(randomAccessFile));
// 解压文件路径
File zdir = new File( f.getAbsolutePath().substring(0, f.getAbsolutePath() .indexOf(".")));
if (!zdir.isDirectory()) {
zdir.mkdir();
}
int[] in = new int[archive.getNumberOfItems()];
for(int i=0;i<in.length;i++){
in[i] = i;
}
archive.extract(in, false, new ExtractCallback(archive, zdir.getAbsolutePath()));
archive.close();
randomAccessFile.close();
} catch (FileNotFoundException | SevenZipException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
private static class ExtractCallback implements IArchiveExtractCallback {
private final IInArchive inArchive;
private final String extractPath;
public ExtractCallback(IInArchive inArchive, String extractPath) {
this.inArchive = inArchive;
if (!extractPath.endsWith("/") && !extractPath.endsWith("\\")) {
extractPath += File.separator;
}
this.extractPath = extractPath;
}
@Override
public void setTotal(long total) {
}
@Override
public void setCompleted(long complete) {
}
@Override
public ISequentialOutStream getStream(int index, ExtractAskMode extractAskMode) throws SevenZipException {
return data -> {
String filePath = inArchive.getStringProperty(index, PropID.PATH);
FileOutputStream fos = null;
try {
File path = new File(extractPath + filePath);
if(!path.getParentFile().exists()){
path.getParentFile().mkdirs();
}
if(!path.exists()){
path.createNewFile();
}
fos = new FileOutputStream(path, true);
fos.write(data);
} catch (IOException e) {
log.info("IOException while extracting " + filePath);
} finally{
try {
if(fos != null){
fos.flush();
fos.close();
}
} catch (IOException e) {
log.error("Could not close FileOutputStream", e);
}
}
return data.length;
};
}
@Override
public void prepareOperation(ExtractAskMode extractAskMode) {
}
@Override
public void setOperationResult(ExtractOperationResult extractOperationResult) {
}
}
最后,有兴趣还可以看一下Apache的common-compress,http://commons.apache.org/proper/commons-compress/examples.html,也可以对很多类型的压缩文件进行操作,好像没有rar格式的!!!
网友评论