Use Java to extract the encrypted Chinese ZIP archive package

In recent projects, you need to unzip the zip archive and then store the extracted content in the specified directory.

The characteristics of the package:

1. Use standard ZIP compression format (compression algorithm not explored in depth)
2. Package with directory and directory name in Chinese
3. Add a password when compressing

Because the java.util.zip.* package that comes with the JRE does not support Chinese and encryption compression, the ZIP4J package is selected.

Here is the extracted implementation code:

1  Public classUnZip {2     Private Final intBuff_size = 4096;3     4     /*5 get the file name and directory name in the zip file6     */7      Public voidgetentrynames (String zipfilepath, string password) {8List<string> entrylist =NewArraylist<string>();9 ZipFile ZF;Ten         Try { OneZF =NewZipFile (zipfilepath); AZf.setfilenamecharset ("GBK");//By default UTF8, if the file name in the compressed package is GBK it will appear garbled -             if(zf.isencrypted ()) { -Zf.setpassword (password);//set a compressed password the             } -              for(Object obj:zf.getFileHeaders ()) { -Fileheader Fileheader =(fileheader) obj; -String fileName = Fileheader.getfilename ();//the file name will be with the hierarchy directory information + Entrylist.add (fileName); -             } +}Catch(zipexception e) { A e.printstacktrace (); at         } -         returnentrylist; -     } -  -     /* - unzip the files in the ZIP package to the specified directory in     */ -      Public voidExtract (String zipfilepath, string password, string destDir) { toInputStream is =NULL; +OutputStream OS =NULL; - ZipFile ZF; the         Try { *ZF =NewZipFile (ZipFile); $Zf.setfilenamecharset ("GBK");Panax Notoginseng             if(zf.isencrypted ()) { - Zf.setpassword (PASSWORD); the             } +              A              for(Object obj:zf.getFileHeaders ()) { theFileheader Fileheader =(fileheader) obj; +String destfile = DestDir + "/" +fileheader.getfilename (); -                 if(!Destfile.getparentfile (). exists ()) { $Destfile.getparentfile (). Mkdirs ();//Create a directory $                 } -is =Zf.getinputstream (fileheader); -OS =NewFileOutputStream (destfile); the                 intReadlen =-1; -                 byte[] Buff =New byte[buff_size];Wuyi                  while((Readlen = Is.read (buff))! =-1) { theOs.write (Buff, 0, Readlen); -                 } Wu             } -}Catch(Exception e) { About e.printstacktrace (); $}finally{ -             //Close Resource -             Try{ -                 if(Is! =NULL){ A is.close (); +                 } the}Catch(IOException IoE) {} -              $             Try{ the                 if(OS! =NULL){ the os.close (); the                 } the}Catch(IOException IoE) {} -         } in     } the}

The above code is not tested and is only used as a pseudo-code reference

Use Java to extract the encrypted Chinese ZIP archive package