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Java如何解压带密码的zip、rar、7z文件？
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前言 在一些日常业务中，会遇到一些琐碎文件需要统一打包到一个压缩包中上传，业务方在后台接收到压缩包后自行解压，然后解析相应文件。而且可能涉及安全保密，因此会在压缩时带上密码，要求后台业务可以指定密码进行解压。 应用环境说明：jdk1.8，maven3.x,需要基于java语言实现对zip、rar、7z等常见压缩包的解压工作。 首先关于zip和rar、7z等压缩工具和压缩算法就不在此赘述，下面通过一个数据对比，使用上述三种不同的压缩算法，采用默认的压缩方式，看到压缩的文件大小如下：
转换成图表看得更直观，如下图：
从以上图表可以看到，7z的压缩率是最高，而zip压缩率比较低，rar比zip稍微好点。单纯从压缩率看，7z>rar4>rar5>zip。 实现代码下面具体说明在java中如何进行相应解压： 1、pom.xml 4.0.0 com.yelang 7zdemo 0.0.1-SNAPSHOT net.lingala.zip4j zip4j 2.9.0 net.sf.sevenzipjbinding sevenzipjbinding 16.02-2.01 net.sf.sevenzipjbinding sevenzipjbinding-all-platforms 16.02-2.01 org.tukaani xz 1.9 org.apache.commons commons-compress 1.21 org.slf4j slf4j-api 1.7.30 org.apache.commons commons-lang3 3.12.0 fr.opensagres.xdocreport xdocreport 1.0.6 登录后复制主要依赖的jar包有：zip4j、sevenzipjbinding等。 2、zip解压 @SuppressWarnings("resource") private static String unZip(String rootPath, String sourceRarPath, String destDirPath, String passWord) { ZipFile zipFile = null; String result = ""; try { //String filePath = sourceRarPath; String filePath = rootPath + sourceRarPath; if (StringUtils.isNotBlank(passWord)) { zipFile = new ZipFile(filePath, passWord.toCharArray()); } else { zipFile = new ZipFile(filePath); } zipFile.setCharset(Charset.forName("GBK")); zipFile.extractAll(rootPath + destDirPath); } catch (Exception e) { log.error("unZip error", e); return e.getMessage(); } return result; }登录后复制3、rar解压private static String unRar(String rootPath, String sourceRarPath, String destDirPath, String passWord) { String rarDir = rootPath + sourceRarPath; String outDir = rootPath + destDirPath + File.separator; 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(); for (final ISimpleInArchiveItem item : simpleInArchive.getArchiveItems()) { final int[] hash = new int[]{0}; if (!item.isFolder()) { ExtractOperationResult result; final long[] sizeArray = new long[1]; File outFile = new File(outDir + 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) { log.error("解压rar成功...." + String.format("%9X | %10s | %s", hash[0], sizeArray[0], item.getPath())); } else if (StringUtils.isNotBlank(passWord)) { log.error("解压rar成功：密码错误或者其他错误...." + result); return "password"; } else { return "rar error"; } } } } catch (Exception e) { log.error("unRar error", e); return e.getMessage(); } finally { try { inArchive.close(); randomAccessFile.close(); } catch (Exception e) { e.printStackTrace(); } } return ""; }登录后复制4、7z解压 private static String un7z(String rootPath, String sourceRarPath, String destDirPath, String passWord) { try { File srcFile = new File(rootPath + sourceRarPath);//获取当前压缩文件 // 判断源文件是否存在 if (!srcFile.exists()) { throw new Exception(srcFile.getPath() + "所指文件不存在"); } //开始解压 SevenZFile zIn = null; if (StringUtils.isNotBlank(passWord)) { zIn = new SevenZFile(srcFile, passWord.toCharArray()); } else { zIn = new SevenZFile(srcFile); } SevenZArchiveEntry entry = null; File file = null; while ((entry = zIn.getNextEntry()) != null) { if (!entry.isDirectory()) { file = new File(rootPath + destDirPath, entry.getName()); if (!file.exists()) { new File(file.getParent()).mkdirs();//创建此文件的上级目录 } OutputStream out = new FileOutputStream(file); BufferedOutputStream bos = new BufferedOutputStream(out); int len = -1; byte[] buf = new byte[1024]; while ((len = zIn.read(buf)) != -1) { bos.write(buf, 0, len); } // 关流顺序，先打开的后关闭 bos.close(); out.close(); } } } catch (Exception e) { log.error("un7z is error", e); return e.getMessage(); } return ""; }登录后复制5、解压统一入口封装public static Map unFile(String rootPath, String sourcePath, String destDirPath, String passWord) { Map resultMap = new HashMap(); String result = ""; if (sourcePath.toLowerCase().endsWith(".zip")) { //Wrong password! result = unZip(rootPath, sourcePath, destDirPath, passWord); } else if (sourcePath.toLowerCase().endsWith(".rar")) { //java.security.InvalidAlgorithmParameterException: password should be specified result = unRar(rootPath, sourcePath, destDirPath, passWord); System.out.println(result); } else if (sourcePath.toLowerCase().endsWith(".7z")) { //PasswordRequiredException: Cannot read encrypted content from G:\ziptest\11111111.7z without a password result = un7z(rootPath, sourcePath, destDirPath, passWord); } resultMap.put("resultMsg", 1); if (StringUtils.isNotBlank(result)) { if (result.contains("password")) resultMap.put("resultMsg", 2); if (!result.contains("password")) resultMap.put("resultMsg", 3); } resultMap.put("files", null); //System.out.println(result + "=============="); return resultMap; }登录后复制6、测试代码Long start = System.currentTimeMillis(); unFile("D:/rarfetch0628/","apache-tomcat-8.5.69.zip","apache-tomcat-zip","222"); long end = System.currentTimeMillis(); System.out.println("zip解压耗时==" + (end - start) + "毫秒"); System.out.println("============================================================"); Long rar4start = System.currentTimeMillis(); unFile("D:/rarfetch0628/","apache-tomcat-8.5.69-4.rar","apache-tomcat-rar4","222"); long rar4end = System.currentTimeMillis(); System.out.println("rar4解压耗时==" + (rar4end - rar4start)+ "毫秒"); System.out.println("============================================================"); Long rar5start = System.currentTimeMillis(); unFile("D:/rarfetch0628/","apache-tomcat-8.5.69-5.rar","apache-tomcat-rar5","222"); long rar5end = System.currentTimeMillis(); System.out.println("rar5解压耗时==" + (rar5end - rar5start)+ "毫秒"); System.out.println("============================================================"); Long zstart = System.currentTimeMillis(); unFile("D:/rarfetch0628/","apache-tomcat-8.5.69.7z","apache-tomcat-7z","222"); long zend = System.currentTimeMillis(); System.out.println("7z解压耗时==" + (zend - zstart)+ "毫秒"); System.out.println("============================================================");登录后复制在控制台中可以看到以下结果：
总结：本文采用java语言实现了对zip和rar、7z文件的解压统一算法。并对比了相应的解压速度，支持传入密码进行在线解压。 本文参考代码在补充内容里，不过代码直接运行有问题，这里进行了调整，主要优化的点如下： 1、pom.xml 遗漏了slf4j、commons-lang3、xdocreport等依赖 2、zip路径优化 3、去掉一些无用信息 4、优化异常信息 补充1.maven引用 net.lingala.zip4j zip4j 2.9.0 net.sf.sevenzipjbinding sevenzipjbinding 16.02-2.01 net.sf.sevenzipjbinding sevenzipjbinding-all-platforms 16.02-2.01 org.tukaani xz 1.9 org.apache.commons commons-compress 1.21 登录后复制2.实现代码如下 import fr.opensagres.xdocreport.core.io.IOUtils; import net.lingala.zip4j.ZipFile; import net.sf.sevenzipjbinding.*; import net.sf.sevenzipjbinding.impl.RandomAccessFileInStream; import net.sf.sevenzipjbinding.simple.ISimpleInArchive; import net.sf.sevenzipjbinding.simple.ISimpleInArchiveItem; import org.apache.commons.compress.archivers.sevenz.SevenZArchiveEntry; import org.apache.commons.compress.archivers.sevenz.SevenZFile; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; import java.util.*; public class ZipAndRarTools { private static final Logger log = LoggerFactory.getLogger(ZipAndRarTools.class); /* 解压zip */ private static String unZip(String rootPath, String sourceRarPath, String destDirPath, String passWord) { ZipFile zipFile = null; try { if (StringUtils.isNotBlank(passWord)) { zipFile = new ZipFile(filePath, passWord.toCharArray()); } else { zipFile = new ZipFile(filePath); } zipFile.extractAll(rootPath + destDirPath); } catch (Exception e) { log.error("unZip error", e); return e.getMessage(); } return ""; } /* 解压rar rar5 */ private static String unRar(String rootPath, String sourceRarPath, String destDirPath, String passWord) { /*final File rar = new File(rootPath + sourceRarPath); final File destinationFolder = new File(rootPath + destDirPath); destinationFolder.mkdir(); try { Junrar.extract(rar, destinationFolder); } catch (Exception e) { log.error("unRar error", e); return e.getMessage(); }*/ String rarDir = rootPath + sourceRarPath; String outDir = rootPath + destDirPath + File.separator; 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(); for (final ISimpleInArchiveItem item : simpleInArchive.getArchiveItems()) { final int[] hash = new int[]{0}; if (!item.isFolder()) { ExtractOperationResult result; final long[] sizeArray = new long[1]; File outFile = new File(outDir + 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) { log.error("解压rar成功...." + String.format("%9X | %10s | %s", hash[0], sizeArray[0], item.getPath())); } else if (StringUtils.isNotBlank(passWord)) { log.error("解压rar成功：密码错误或者其他错误...." + result); return "password"; } else { return "rar error"; } } } } catch (Exception e) { log.error("unRar error", e); return e.getMessage(); } finally { try { inArchive.close(); randomAccessFile.close(); } catch (Exception e) { e.printStackTrace(); } } return ""; } /* * 解压7z */ private static String un7z(String rootPath, String sourceRarPath, String destDirPath, String passWord) { try { File srcFile = new File(rootPath + sourceRarPath);//获取当前压缩文件 // 判断源文件是否存在 if (!srcFile.exists()) { throw new Exception(srcFile.getPath() + "所指文件不存在"); } //开始解压 SevenZFile zIn = null; if (StringUtils.isNotBlank(passWord)) new SevenZFile(srcFile, passWord.getBytes()); else new SevenZFile(srcFile); SevenZArchiveEntry entry = null; File file = null; while ((entry = zIn.getNextEntry()) != null) { if (!entry.isDirectory()) { file = new File(rootPath + destDirPath, entry.getName()); if (!file.exists()) { new File(file.getParent()).mkdirs();//创建此文件的上级目录 } OutputStream out = new FileOutputStream(file); BufferedOutputStream bos = new BufferedOutputStream(out); int len = -1; byte[] buf = new byte[1024]; while ((len = zIn.read(buf)) != -1) { bos.write(buf, 0, len); } // 关流顺序，先打开的后关闭 bos.close(); out.close(); } } } catch (Exception e) { log.error("un7z is error", e); return e.getMessage(); } return ""; } public static void unFile(String rootPath, String sourcePath, String destDirPath, String passWord) { String result = ""; if (sourcePath.toLowerCase().endsWith(".zip")) { //Wrong password! result = unZip(rootPath, sourcePath, destDirPath, passWord); } else if (sourcePath.toLowerCase().endsWith(".rar")) { //java.security.InvalidAlgorithmParameterException: password should be specified result = unRar(rootPath, sourcePath, destDirPath, passWord); } else if (sourcePath.toLowerCase().endsWith(".7z")) { //PasswordRequiredException: Cannot read encrypted content from G:\ziptest\11111111.7z without a password result = un7z(rootPath, sourcePath, destDirPath, passWord); } resultMap.put("resultMsg", 1); if (StringUtils.isNotBlank(result)) { if (result.contains("password")) resultMap.put("resultMsg", 2); if (!result.contains("password")) resultMap.put("resultMsg", 3); } resultMap.put("files", data); // System.out.println(result + "=============="); return resultMap; } public static void main(String[] args) { getFileList("G:\\ziptest\\", "测试.zip", "test3333", "密码"); } }登录后复制以上就是Java如何解压带密码的zip、rar、7z文件？的详细内容，更多请关注php中文网其它相关文章！ |
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