Java实现解压RAR5算法压缩的rar文件与判断是否rar5加
2023-08-11 本文已影响0人
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1、参考文件 Java解压RAR5
RAR5加密算法并未公布，所以很多开源工具包都只支持rar4，在解压rar5格式时，会报出不支持rar5格式的错误，比如常用的junara 经过仔细的翻阅Google，找到了解决方案
2.pom文件导入jar
<dependency>
<groupId>com.github.axet</groupId>
<artifactId>java-unrar</artifactId>
<version>1.7.0-8</version>
</dependency>
<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>
3、代码实现ExtractCallback
import net.sf.sevenzipjbinding.*;
import java.io.*;
public class ExtractCallback implements IArchiveExtractCallback {
private int index;
private IInArchive inArchive;
private String ourDir;
public ExtractCallback(IInArchive inArchive, String ourDir) {
this.inArchive = inArchive;
this.ourDir = ourDir;
}
@Override
public void setCompleted(long arg0) {
}
@Override
public void setTotal(long arg0) {
}
@Override
public ISequentialOutStream getStream(int index, ExtractAskMode extractAskMode) throws SevenZipException {
this.index = index;
final String path = (String) inArchive.getProperty(index, PropID.PATH);
final boolean isFolder = (boolean) inArchive.getProperty(index, PropID.IS_FOLDER);
return data -> {
try {
if (!isFolder) {
File file = new File(ourDir + path);
saveFile(file, data);
}
} catch (Exception e) {
e.printStackTrace();
}
return data.length;
};
}
@Override
public void prepareOperation(ExtractAskMode arg0) {
}
@Override
public void setOperationResult(ExtractOperationResult extractOperationResult) {
}
public static void saveFile(File file, byte[] msg) {
OutputStream fos = null;
try {
File parent = file.getParentFile();
if ((!parent.exists()) && (!parent.mkdirs())) {
return;
}
fos = new FileOutputStream(file, true);
fos.write(msg);
fos.flush();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
4、代码实现ExtractCallback
import java.io.*;
import net.sf.sevenzipjbinding.IInArchive;
import net.sf.sevenzipjbinding.SevenZip;
import net.sf.sevenzipjbinding.impl.RandomAccessFileInStream;
public class FileUtil {
/**
* 经过测试，可以解压rar5算法的压缩文件
* @param rarDir 解压文件的路径
* @param outDir 解压之后输出的路径
*/
public static void unRarfile(String rarDir, String outDir) {
try {
// 第一个参数是需要解压的压缩包路径，第二个参数参考JdkAPI文档的RandomAccessFile
//r代表以只读的方式打开文本，也就意味着不能用write来操作文件
RandomAccessFile randomAccessFile = new RandomAccessFile(rarDir, "r");
IInArchive archive = SevenZip.openInArchive(null, new RandomAccessFileInStream(randomAccessFile));
int[] in = new int[archive.getNumberOfItems()];
for (int i = 0; i < in.length; i++) {
in[i] = i;
}
//拼接输出目录文件路径
String dest = outDir.substring(0, outDir.lastIndexOf("\\"))+"/";
archive.extract(in, false, new ExtractCallback(archive, dest));
archive.close();
randomAccessFile.close();
} catch (Exception e) {
err.println(e.getMessage());
}
}
}
5、带密码与不带密码的解压
- 可以直接使用此方法即可，其他可以不用都没问题。
推荐用此方法即可
/**
* @param rarDir rar解压文件路径包含文件名称
* @param outDir rar存储文件路径不含文件名称
* @param passWord 密码
* @return
*/
public static boolean unRar(String rarDir, String outDir, String passWord) {
RandomAccessFile randomAccessFile = null;
IInArchive inArchive = null;
try {
// 第一个参数是需要解压的压缩包路径，第二个参数参考JdkAPI文档的RandomAccessFile
randomAccessFile = new RandomAccessFile(rarDir, "r");
if (StringUtils.isNotBlank(passWord)){
inArchive = SevenZip.openInArchive(null, new RandomAccessFileInStream(randomAccessFile), passWord);
}else{
inArchive = SevenZip.openInArchive(null, new RandomAccessFileInStream(randomAccessFile));
}
ISimpleInArchive simpleInArchive = inArchive.getSimpleInterface();
int fileCout = 0;
//int failCout = 0;
int itemCout = simpleInArchive.getArchiveItems().length;
//String fail = "";
for (final ISimpleInArchiveItem item : simpleInArchive.getArchiveItems()) {
final int[] hash = new int[]{0};
//PDF是否
if (!item.isFolder()) {
ExtractOperationResult result;
final long[] sizeArray = new long[1];
String dest = outDir.substring(0, outDir.lastIndexOf("\\")) + "\\";
File outFile = new File(dest + item.getPath());
File parent = outFile.getParentFile();
if ((!parent.exists()) && (!parent.mkdirs())) {
continue;
}
if (StringUtils.isNotBlank(passWord)) {
result = item.extractSlow(data -> {
try {
IOUtils.write(data, new FileOutputStream(outFile, true));
} catch (Exception e) {
e.printStackTrace();
}
hash[0] ^= Arrays.hashCode(data); // Consume data
sizeArray[0] += data.length;
return data.length; // Return amount of consumed
}, passWord);
} else {
result = item.extractSlow(data -> {
try {
IOUtils.write(data, new FileOutputStream(outFile, true));
} catch (Exception e) {
e.printStackTrace();
}
hash[0] ^= Arrays.hashCode(data); // Consume data
sizeArray[0] += data.length;
return data.length; // Return amount of consumed
});
}
if (result == ExtractOperationResult.OK) {
//LoggerHelper.info("解压rar成功...." + String.format("%9X | %10s | %s", hash[0], sizeArray[0], item.getPath()));
//return true;
fileCout++;
} else {
//failCout++;
//fail += "解压rar失败...." + item.getPath() + "\n";
break;
}
}
}
//去掉一个文件夹名称就正确
if (fileCout - 1 == itemCout) {
String fileName = new File(rarDir).getName();
// LoggerHelper.info("解压rar成功....【" + fileName + "】总共有：【" + fileCout + "】个文件");
return true;
} else {
//LoggerHelper.info("解压rar失败....【" + fail + "】总共有：【" + failCout + "】个文件");
return false;
}
} catch (Exception e) {
//LoggerHelper.info("\n unRar--" + e.getMessage());
return false;
} finally {
try {
if (inArchive != null && randomAccessFile != null) {
inArchive.close();
randomAccessFile.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
6、判断rar压缩文件是否是rar5算法
/**
* 创建RAR5判断方式是否检测密码方式
*
* @param rarFilePath
* @return
*/
public static boolean checkPwdRar5(String rarFilePath) {
IInStream inStream = null;
IInArchive inArchive = null;
try {
// 创建RAR文件对象
File rarFile = new File(rarFilePath);
// 创建RandomAccessFile用于读取RAR文件
RandomAccessFile randomAccessFile = new RandomAccessFile(rarFile, "r");
// 创建RandomAccessFileInStream
inStream = new RandomAccessFileInStream(randomAccessFile);
// 打开压缩文件
inArchive = SevenZip.openInArchive(null, inStream);
// 获取压缩文件中的所有项
ISimpleInArchive simpleInArchive = inArchive.getSimpleInterface();
ISimpleInArchiveItem[] archiveItems = simpleInArchive.getArchiveItems();
// 检查文件是否有密码
boolean hasPassword = Arrays.stream(archiveItems)
.anyMatch(item -> {
try {
return item.isEncrypted();
} catch (SevenZipException e) {
throw new RuntimeException(e);
}
});
// 输出检测结果
if (hasPassword) {
System.out.println("RAR文件带有密码！");
return true;
} else {
System.out.println("RAR文件没有密码。");
return false;
}
} catch (Exception e) {
System.out.println("检测rar5异常" + e.getMessage());
return false;
} finally {
// 关闭RandomAccessFileInStream和压缩文件
if (inArchive != null) {
try {
inArchive.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
if (inStream != null) {
try {
inStream.close();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
}
7、代码运行
public class DoMain {
public static void main(String[] args) {
String rarPath = "D:\\test\\test.rar";
//替换文件后缀作为一个输出目标路径.
String destPath = rarPath.replace(".rar", "-file");
FileUtil.unRarfile(rarPath,destPath);
String pwd="1221222";
if(checkPwdRar5(rarPath)){
unRar(rarPath,destPath,pwd);
}else{
unRar(rarPath,destPath,"");
}
}
}
8 总结与推荐学习文章
- 欢迎━(｀∀´)ノ亻!转发与使用。
- 此文章是参考其他博客整理，仅供参考学习。
