Ziputil is the best compression and decompression tool class in history with code

Package COM. example. a; import Java. io. bufferedreader; import Java. io. file; import Java. io. fileinputstream; import Java. io. filenotfoundexception; import Java. io. fileoutputstream; import Java. io. filereader; import Java. io. ioexception; import Java. io. inputstream; import Java. io. printwriter; import Java. security. messagedigest; import Java. util. date; import java.util.zip. zipentry; import java.util.zip. zipinputstream; Import java.util.zip. zipoutputstream; import android. OS. handler; import android. OS. message; /*** tool class for File compression and decompression * @ author MX */public class ziputil {/*** MD5 encrypted ZIP file * @ Param path: compressed file path * @ return */public static string ziptomd5 (string path) {stringbuffer MD5 = new stringbuffer (); fileinputstream FCM = NULL; try {file F = new file (PATH); If (! F. exists () {Throw new runtimeexception (path + "does not exist! ");} Messagedigest MD = messagedigest. getinstance ("MD5"); byte [] STR = new byte [2048]; int length =-1; FD = new fileinputstream (f ); try {While (length = Fi. read (STR ))! =-1) {Md. update (STR, 0, length);} byte [] result = md. digest (); For (INT I = 0; I <result. length; I ++) {md5.append (result [I]) ;}} catch (ioexception e) {e. printstacktrace () ;}} catch (exception e) {e. printstacktrace ();} finally {try {FCM. close ();} catch (ioexception e) {e. printstacktrace () ;}} return md5.tostring () ;}/ *** compress the file into a zip file * @ Param filepath source file path * @ Param zipfilepath ZIP file path */public static Void createzipfile (string filepath, string zipfilepath) {fileoutputstream Fos = NULL; zipoutputstream ZOS = NULL; try {Fos = new fileoutputstream (zipfilepath); ZOS = new zipoutputstream (FOS ); writezipfile (new file (filepath), ZOS, "");} catch (filenotfoundexception e) {e. printstacktrace ();} finally {try {If (ZOS! = NULL) ZOS. Close () ;}catch (ioexception e) {e. printstacktrace () ;}try {If (FOS! = NULL) FOS. close ();} catch (ioexception e) {e. printstacktrace () ;}} Private Static void writezipfile (file F, zipoutputstream ZOS, string hiberarchy) {If (F. exists () {If (F. isdirectory () {hiberarchy + = f. getname () + "/"; file [] fif = f. listfiles (); For (INT I = 0; I <fif. length; I ++) {writezipfile (FIF [I], ZOS, hiberarchy) ;}} else {fileinputstream FCM = NULL; try {FD = new fileinputstream (f); zipentry Ze = new zipentry (hiberarchy + F. getname (); ZOS. putnextentry (ze); byte [] B = new byte [1024]; while (FCM. read (B )! =-1) {ZOS. write (B); B = new byte [1024];} catch (filenotfoundexception e) {e. printstacktrace ();} catch (ioexception e) {e. printstacktrace ();} finally {try {If (FS! = NULL) fiis. close ();} catch (ioexception e) {e. printstacktrace ();}}}}} /*** zip compression of the file based on the input stream * @ Param in file input stream * @ Param sdestpath the destination path of the ZIP file * @ Param myhandler UI update through handler */public static void ectract (final inputstream in, final string sdestpath, final handler myhandler) {New thread () {@ overridepublic void run () {try {int length = in. available (); zipinputstream Zins = new zipinputstream (in); zipent Ry ze = NULL; int COUNT = 0; byte ch [] = new byte [2048]; while (ze = Zins. getnextentry ())! = NULL) {file zfile = new file (sdestpath + Ze. getname (); file fpath = new file (zfile. getparentfile (). getpath (); If (Ze. isdirectory () {If (! Zfile. exists () zfile. mkdirs (); Zins. closeentry ();} else {If (! Fpath. exists () fpath. mkdirs (); fileoutputstream Fouts = new fileoutputstream (zfile); int I; while (I = Zins. Read (CH ))! =-1) {count + = I; int downloadprogressvalue = (INT) (float) count/length) * 100); message. obtain (myhandler, 0, downloadprogressvalue ). sendtotarget (); Fouts. write (CH, 0, I);} Zins. closeentry (); Fouts. close () ;}} message. obtain (myhandler, 1 ). sendtotarget (); In. close (); Zins. close ();} catch (exception e) {message. obtain (myhandler, 2 ). sendtotarget ();}}}. start ();}/*** decompress the ZIP file * @ Param szippathfile Z IP file path * @ Param sdestpath the decompressed file path * @ return * @ throws ioexception */public static Boolean ziptofile (string szippathfile, string sdestpath) throws ioexception {Boolean flag = false; fileinputstream fins = NULL; zipinputstream Zins = NULL; fileoutputstream Fouts = NULL; try {fins = new fileinputstream (szippathfile); Zins = new zipinputstream (FINS); zipentry ze = NULL; byte ch [] = new byte [2048]; while (ze = Zins. getnextentry ())! = NULL) {file zfile = new file (sdestpath + "//" + Ze. getname (); file fpath = new file (zfile. getparentfile (). getpath (); If (Ze. isdirectory () {If (! Zfile. exists () zfile. mkdirs (); Zins. closeentry ();} else {If (! Fpath. exists () fpath. mkdirs (); Fouts = new fileoutputstream (zfile); int I; string zfilepath = zfile. getabsolutepath (); While (I = Zins. read (CH ))! =-1) Fouts. write (CH, 0, I); Zins. closeentry (); If (zfilepath. endswith (". zip ") {ziptofile (zfilepath, zfilepath. substring (0, zfilepath. lastindexof (". zip ") ;}}// if you delete the ZIP file after decompression, you can file = new file (szippathfile); file. delete (); flag = true;} catch (exception e) {flag = false; E. printstacktrace ();} finally {If (Fouts! = NULL) Fouts. Close (); If (Zins! = NULL) Zins. Close (); If (fins! = NULL) fins. close () ;}return flag ;} /*** @ Param Delete the compressed package before date * @ Param f * @ Param base * @ throws exception */public static void delzip (date, string path) {try {long d = date. gettime (); file F = new file (PATH); file [] files = f. listfiles (); For (INT I = 0; I <files. length; I ++) {If (files [I]. isfile () {long f_date = files [I]. lastmodified (); If (f_date <D) {files [I]. delete () ;}}} catch (exception E) {E. printstacktrace () ;}/ *** copy file ** @ Param frompath * @ Param topath * @ throws ioexception */public static void copy (string frompath, string topath) throws ioexception {printwriter PFP = NULL; filereader Fr = NULL; bufferedreader BR = NULL; try {file F1 = new file (frompath); If (f1.isdirectory ()) {} else {// Fr = new filereader (frompath); BR = new bufferedreader (FR); string temp = ""; string line = NUL L; while (line = Br. Readline ())! = NULL) {temp + = line? File F2 = new file (topath); f2.mkdir (); file F3 = new file (F2, f1.getname (); PFP = new printwriter (F3); PFP. print (temp) ;}} catch (exception e) {e. getstacktrace ();} finally {If (PFP! = NULL) PFP. Close (); If (BR! = NULL) Br. Close (); If (fr! = NULL) Fr. Close ();}}}