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
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yelang</groupId>
<artifactId>7zdemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>net.lingala.zip4j</groupId>
<artifactId>zip4j</artifactId>
<version>2.9.0</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>
<dependency>
<groupId>org.tukaani</groupId>
<artifactId>xz</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.21</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.30</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/fr.opensagres.xdocreport/xdocreport -->
<dependency>
<groupId>fr.opensagres.xdocreport</groupId>
<artifactId>xdocreport</artifactId>
<version>1.0.6</version>
</dependency>
</dependencies>
</project>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;
}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 "";
}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 "";
}5、解压统一入口封装
public static Map<String,Object> unFile(String rootPath, String sourcePath, String destDirPath, String passWord) {
Map<String,Object> resultMap = new HashMap<String, Object>();
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;
}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("============================================================");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
<dependency>
<groupId>net.lingala.zip4j</groupId>
<artifactId>zip4j</artifactId>
<version>2.9.0</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>
<dependency>
<groupId>org.tukaani</groupId>
<artifactId>xz</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.21</version>
</dependency>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");
}
}The above is the detailed content of How to decompress zip, rar, and 7z files with password in Java?. For more information, please follow other related articles on the PHP Chinese website!
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