第Java對zip,rar,7z文件帶密碼解壓實例詳解目錄前言實現(xiàn)代碼1、pom.xml2、zip解壓3、rar解壓4、7z解壓5、解壓統(tǒng)一入口封裝6、測試代碼補充

前言

在一些日常業(yè)務(wù)中，會遇到一些瑣碎文件需要統(tǒng)一打包到一個壓縮包中上傳，業(yè)務(wù)方在后臺接收到壓縮包后自行解壓，然后解析相應文件。而且可能涉及安全保密，因此會在壓縮時帶上密碼，要求后臺業(yè)務(wù)可以指定密碼進行解壓。

應用環(huán)境說明：jdk1.8，maven3.x,需要基于java語言實現(xiàn)對zip、rar、7z等常見壓縮包的解壓工作。

首先關(guān)于zip和rar、7z等壓縮工具和壓縮算法就不在此贅述，下面通過一個數(shù)據(jù)對比，使用上述三種不同的壓縮算法，采用默認的壓縮方式，看到壓縮的文件大小如下：

轉(zhuǎn)換成圖表看得更直觀，如下圖：

從以上圖表可以看到，7z的壓縮率是最高，而zip壓縮率比較低，rar比zip稍微好點。單純從壓縮率看，7zrar4rar5zip。

實現(xiàn)代碼

下面具體說明在java中如何進行相應解壓：

1、pom.xml

projectxmlns="/POM/4.0.0"

xmlns:xsi="/2001/XMLSchema-instance"

xsi:schemaLocation="/POM/4.0.0/xsd/maven-4.0.0.xsd"

modelVersion4.0.0/modelVersion

groupIdcom.yelang/groupId

artifactId7zdemo/artifactId

version0.0.1-SNAPSHOT/version

dependencies

dependency

groupIdnet.lingala.zip4j/groupId

artifactIdzip4j/artifactId

version2.9.0/version

/dependency

dependency

groupIdnet.sf.sevenzipjbinding/groupId

artifactIdsevenzipjbinding/artifactId

version16.02-2.01/version

/dependency

dependency

groupIdnet.sf.sevenzipjbinding/groupId

artifactIdsevenzipjbinding-all-platforms/artifactId

version16.02-2.01/version

/dependency

dependency

groupIdorg.tukaani/groupId

artifactIdxz/artifactId

version1.9/version

/dependency

dependency

groupIdmons/groupId

artifactIdcommons-compress/artifactId

version1.21/version

/dependency

!--/artifact/org.slf4j/slf4j-api--

dependency

groupIdorg.slf4j/groupId

artifactIdslf4j-api/artifactId

version1.7.30/version

/dependency

!--/artifact/mons/commons-lang3--

dependency

groupIdmons/groupId

artifactIdcommons-lang3/artifactId

version3.12.0/version

/dependency

!--/artifact/fr.opensagres.xdocreport/xdocreport--

dependency

groupIdfr.opensagres.xdocreport/groupId

artifactIdxdocreport/artifactId

version1.0.6/version

/dependency

/dependencies

/project

主要依賴的jar包有：zip4j、sevenzipjbinding等。

2、zip解壓

@SuppressWarnings("resource")

privatestaticStringunZip(StringrootPath,StringsourceRarPath,StringdestDirPath,StringpassWord){

ZipFilezipFile=null;

Stringresult="";

try{

//StringfilePath=sourceRarPath;

StringfilePath=rootPath+sourceRarPath;

if(StringUtils.isNotBlank(passWord)){

zipFile=newZipFile(filePath,passWord.toCharArray());

}else{

zipFile=newZipFile(filePath);

zipFile.setCharset(Charset.forName("GBK"));

zipFile.extractAll(rootPath+destDirPath);

}catch(Exceptione){

log.error("unZiperror",e);

returne.getMessage();

returnresult;

3、rar解壓

privatestaticStringunRar(StringrootPath,StringsourceRarPath,StringdestDirPath,StringpassWord){

StringrarDir=rootPath+sourceRarPath;

StringoutDir=rootPath+destDirPath+File.separator;

RandomAccessFilerandomAccessFile=null;

IInArchiveinArchive=null;

try{

//第一個參數(shù)是需要解壓的壓縮包路徑，第二個參數(shù)參考JdkAPI文檔的RandomAccessFile

randomAccessFile=newRandomAccessFile(rarDir,"r");

if(StringUtils.isNotBlank(passWord))

inArchive=SevenZip.openInArchive(null,newRandomAccessFileInStream(randomAccessFile),passWord);

else

inArchive=SevenZip.openInArchive(null,newRandomAccessFileInStream(randomAccessFile));

ISimpleInArchivesimpleInArchive=inArchive.getSimpleInterface();

for(finalISimpleInArchiveItemitem:simpleInArchive.getArchiveItems()){

finalint[]hash=newint[]{0};

if(!item.isFolder()){

ExtractOperationResultresult;

finallong[]sizeArray=newlong[1];

FileoutFile=newFile(outDir+item.getPath());

Fileparent=outFile.getParentFile();

if((!parent.exists())(!parent.mkdirs())){

continue;

if(StringUtils.isNotBlank(passWord)){

result=item.extractSlow(data-{

try{

IOUtils.write(data,newFileOutputStream(outFile,true));

}catch(Exceptione){

e.printStackTrace();

hash[0]^=Arrays.hashCode(data);//Consumedata

sizeArray[0]+=data.length;

returndata.length;//Returnamountofconsumed

},passWord);

}else{

result=item.extractSlow(data-{

try{

IOUtils.write(data,newFileOutputStream(outFile,true));

}catch(Exceptione){

e.printStackTrace();

hash[0]^=Arrays.hashCode(data);//Consumedata

sizeArray[0]+=data.length;

returndata.length;//Returnamountofconsumed

if(result==ExtractOperationResult.OK){

log.error("解壓rar成功...."+String.format("%9X|%10s|%s",hash[0],sizeArray[0],item.getPath()));

}elseif(StringUtils.isNotBlank(passWord)){

log.error("解壓rar成功：密碼錯誤或者其他錯誤...."+result);

return"password";

}else{

return"rarerror";

}catch(Exceptione){

log.error("unRarerror",e);

returne.getMessage();

}finally{

try{

inArchive.close();

randomAccessFile.close();

}catch(Exceptione){

e.printStackTrace();

return"";

4、7z解壓

privatestaticStringun7z(StringrootPath,StringsourceRarPath,StringdestDirPath,StringpassWord){

try{

FilesrcFile=newFile(rootPath+sourceRarPath);//獲取當前壓縮文件

//判斷源文件是否存在

if(!srcFile.exists()){

thrownewException(srcFile.getPath()+"所指文件不存在");

//開始解壓

SevenZFilezIn=null;

if(StringUtils.isNotBlank(passWord)){

zIn=newSevenZFile(srcFile,passWord.toCharArray());

}else{

zIn=newSevenZFile(srcFile);

SevenZArchiveEntryentry=null;

Filefile=null;

while((entry=zIn.getNextEntry())!=null){

if(!entry.isDirectory()){

file=newFile(rootPath+destDirPath,entry.getName());

if(!file.exists()){

newFile(file.getParent()).mkdirs();//創(chuàng)建此文件的上級目錄

OutputStreamout=newFileOutputStream(file);

BufferedOutputStreambos=newBufferedOutputStream(out);

intlen=-1;

byte[]buf=newbyte[1024];

while((len=zIn.read(buf))!=-1){

bos.write(buf,0,len);

//關(guān)流順序，先打開的后關(guān)閉

bos.close();

out.close();

}catch(Exceptione){

log.error("un7ziserror",e);

returne.getMessage();

return"";

5、解壓統(tǒng)一入口封裝

publicstaticMapString,ObjectunFile(StringrootPath,StringsourcePath,StringdestDirPath,StringpassWord){

MapString,ObjectresultMap=newHashMapString,Object

Stringresult="";

if(sourcePath.toLowerCase().endsWith(".zip")){

//Wrongpassword!

result=unZip(rootPath,sourcePath,destDirPath,passWord);

}elseif(sourcePath.toLowerCase().endsWith(".rar")){

//java.security.InvalidAlgorithmParameterException:passwordshouldbespecified

result=unRar(rootPath,sourcePath,destDirPath,passWord);

System.out.println(result);

}elseif(sourcePath.toLowerCase().endsWith(".7z")){

//PasswordRequiredException:CannotreadencryptedcontentfromG:\ziptest\11111111.7zwithoutapassword

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+"==============");

returnresultMap;

6、測試代碼

Longstart=System.currentTimeMillis();

unFile("D:/rarfetch0628/","apache-tomcat-8.5.69.zip","apache-tomcat-zip","222");

longend=System.currentTimeMillis();

System.out.println("zip解壓耗時=="+(end-start)+"毫秒");

System.out.println("============================================================");

Longrar4start=System.currentTimeMillis();

unFile("D:/rarfetch0628/","apache-tomcat-8.5.69-4.rar","apache-tomcat-rar4","222");

longrar4end=System.currentTimeMillis();

System.out.println("rar4解壓耗時=="+(rar4end-rar4start)+"毫秒");

System.out.println("============================================================");

Longrar5start=System.currentTimeMillis();

unFile("D:/rarfetch0628/","apache-tomcat-8.5.69-5.rar","apache-tomcat-rar5","222");

longrar5end=System.currentTimeMillis();

System.out.println("rar5解壓耗時=="+(rar5end-rar5start)+"毫秒");

System.out.println("============================================================");

Longzstart=System.currentTimeMillis();

unFile("D:/rarfetch0628/","apache-tomcat-z","apache-tomcat-7z","222");

longzend=System.currentTimeMillis();

System.out.println("7z解壓耗時=="+(zend-zstart)+"毫秒");

System.out.println("============================================================");

在控制臺中可以看到以下結(jié)果：

總結(jié)：本文采用java語言實現(xiàn)了對zip和rar、7z文件的解壓統(tǒng)一算法。并對比了相應的解壓速度，支持傳入密碼進行在線解壓。

本文參考代碼在補充內(nèi)容里，不過代碼直接運行有問題，這里進行了調(diào)整，主要優(yōu)化的點如下：

1、pom.xml遺漏了slf4j、commons-lang3、xdocreport等依賴

2、zip路徑優(yōu)化

3、去掉一些無用信息

4、優(yōu)化異常信息

補充

1.maven引用

dependency

groupIdnet.lingala.zip4j/groupId

artifactIdzip4j/artifactId

version2.9.0/version

/dependency

dependency

groupIdnet.sf.sevenzipjbinding/groupId

artifactIdsevenzipjbinding