Java Zip uncompressed __java

Recent Android projects require a built-in data file, zip compression to reduce the volume of packets, and the need to unzip the zip file at the client. summed up the information on the Internet predecessors, wrote a decompression zip tool class, in order to reuse.

Ziputils.java

Package com.example.zip;
Import java.io.*;
Import java.util.ArrayList;
Import java.util.Collection;
Import java.util.Enumeration;
Import Java.util.zip.ZipEntry;
Import java.util.zip.ZipException;
Import Java.util.zip.ZipFile;

Import Java.util.zip.ZipOutputStream; 

    /** * Java utils Implementation of the ZIP tool */public class Ziputils {private static final int buff_size = 1024 * 1024;//1M Byte /** * Batch compressed file (clip) * * @param resfilelist List of files (folders) to compress * @param compressed files generated by ZipFile * @throws Ioexc Eption throws/public static void Zipfiles (Collection<file> resfilelist, File ZipFile) throws when an error occurs in the compression process (IOEXCEP
                tion {zipoutputstream zipout = new Zipoutputstream (New Bufferedoutputstream (
        ZipFile), buff_size);
        for (File resfile:resfilelist) {zipfile (resfile, ZipOut, "");
    } zipout.close (); /** * Batch compressed files (clips) * * @param resfilelist List of files (folders) to compress * @param zipfile generated pressureShrink file * @param Comment Compressed file comments * @throws IOException throw/public static void Zipfiles when the compression process fails (Collection <File> resfilelist, File ZipFile, String comment) throws IOException {Zipoutputstream =
        New Zipoutputstream (New Bufferedoutputstream (New FileOutputStream (ZipFile), buff_size));
        for (File resfile:resfilelist) {zipfile (resfile, ZipOut, "");
        } zipout.setcomment (comment);
    Zipout.close (); /** * Extract a file * * @param zipfile Compressed file * @param folderpath uncompressed target directory * @throws IOException when
        Thrown/public static void Upzipfile (File zipfile, String folderpath) throws zipexception when the decompression process fails, IOException {
        File Desdir = new file (FolderPath);
        if (!desdir.exists ()) {desdir.mkdirs ();
        ZipFile ZF = new ZipFile (ZipFile); for (enumeration<?> entries = Zf.entries (); entries.hasmoreelements ();)
   {         ZipEntry entry = ((ZipEntry) entries.nextelement ());
            InputStream in = Zf.getinputstream (entry);
            String str = folderpath + file.separator + entry.getname ();
            str = new String (str.getbytes ("8859_1"), "GB2312");
            File Desfile = new file (str);
                if (!desfile.exists ()) {File Fileparentdir = Desfile.getparentfile ();
                if (!fileparentdir.exists ()) {fileparentdir.mkdirs ();
            } desfile.createnewfile ();
            } outputstream out = new FileOutputStream (desfile);
            byte buffer[] = new Byte[buff_size];
            int reallength;
            while ((Reallength = in.read (buffer)) > 0) {out.write (buffer, 0, reallength);
            } in.close ();
        Out.close (); /** * Extract file name containing incoming text * * @param zipfile Compressed file * @param folderpath destination folder * @param name COntains incoming file matching name * @throws zipexception Compressed format error thrown * @throws IOException IO error throw/public static Arrayl Ist<file> Upzipselectedfile (File zipfile, String folderpath, String namecontains) throws Zipexception, I

        oexception {arraylist<file> filelist = new arraylist<file> ();
        File Desdir = new file (FolderPath);
        if (!desdir.exists ()) {Desdir.mkdir ();
        ZipFile ZF = new ZipFile (ZipFile); for (enumeration<?> entries = Zf.entries (); entries.hasmoreelements ();)
            {ZipEntry entry = (zipentry) entries.nextelement ());
                if (Entry.getname (). Contains (Namecontains)) {InputStream in = Zf.getinputstream (entry);
                String str = folderpath + file.separator + entry.getname ();
                str = new String (str.getbytes ("8859_1"), "GB2312"); Str.getbytes ("GB2312"), "8859_1" Output//Str.getbytes ("8859_1"), "GB2312 "Enter File Desfile = new file (str);
                    if (!desfile.exists ()) {File Fileparentdir = Desfile.getparentfile ();
                    if (!fileparentdir.exists ()) {fileparentdir.mkdirs ();
                } desfile.createnewfile ();
                } outputstream out = new FileOutputStream (desfile);
                byte buffer[] = new Byte[buff_size];
                int reallength;
                while ((Reallength = in.read (buffer)) > 0) {out.write (buffer, 0, reallength);
                } in.close ();
                Out.close ();
            Filelist.add (Desfile);
    } return filelist; /** * Obtain compressed file list * * @param zipfile Compressed file * @return Compressed file name * @throws zipexception Compressed file Throw * @throws IOException When an error occurs in the decompression process * * public static arraylist<string> geTentriesnames (File zipfile) throws Zipexception, IOException {arraylist<string> entrynames = new ArrayList& Lt
        String> ();
        enumeration<?> entries = getentriesenumeration (ZipFile);
            while (Entries.hasmoreelements ()) {ZipEntry entry = ((ZipEntry) entries.nextelement ());
        Entrynames.add (New String (Getentryname (Entry). GetBytes ("GB2312"), "8859_1");
    return entrynames; /** * Get compressed file to obtain its properties * @param zipfile Compressed file * @return Returns a list of compressed files * @throws zipexcept Ion compressed file with incorrect format throw * @throws IOException IO operation is incorrect throw/public static enumeration<?> getentriesenumeration (
        File ZipFile) throws Zipexception, IOException {zipfile ZF = new ZipFile (ZipFile);

    return Zf.entries (); /** * Get a comment on a compressed file object * * @param entry Compressed File object * @return A comment for a compressed file object * @throws Unsupportedencodin Gexception */public static String getEntrycomment (ZipEntry entry) throws Unsupportedencodingexception {return new String (Entry.getcomment (). GetBytes ("
    GB2312 ")," 8859_1 "); /** * Gets the name of the compressed file object * * @param entry Compressed File object * @return The name of the compressed file object * @throws Unsupportedencodin Gexception */public static String Getentryname (ZipEntry entry) throws Unsupportedencodingexception {RET
    Urn New String (Entry.getname (). GetBytes ("GB2312"), "8859_1"); 
     /** * Compressed File * * @param resfile files (folders) to be compressed * @param zipout Compressed file * @param rootpath Compressed Files path * @throws FileNotFoundException can not find the file thrown * @throws IOException when the compression process error, throw/private static void Zipfi
        Le (File resfile, Zipoutputstream zipout, String rootpath) throws FileNotFoundException, IOException { RootPath = RootPath + (Rootpath.trim (). Length () = 0?
        "": file.separator) + resfile.getname (); RootPath = new String (rootpath.getbytes ("8859_1"), "GB2312 ");
            if (Resfile.isdirectory ()) {file[] filelist = Resfile.listfiles ();
            for (file file:filelist) {zipfile (file, zipout, RootPath);
            } else {byte buffer[] = new Byte[buff_size];
            Bufferedinputstream in = new Bufferedinputstream (new FileInputStream (resfile), buff_size);
            Zipout.putnextentry (New ZipEntry (RootPath));
            int reallength;
            while ((Reallength = in.read (buffer))!=-1) {zipout.write (buffer, 0, reallength);
            } in.close ();
            Zipout.flush ();
        Zipout.closeentry ();
 }
    }
}

Test class Test.java

Package com.example.zip;
Import Java.io.File;
Import java.io.IOException;
Import Java.util.Arrays;
Import java.util.List;

Import java.util.zip.ZipException; public class Test {/** * @param args */public static void main (string[] args) {String Sourcedirpath = "d:/fbb
		/test/";
		String Destdirpath = "d:/fbb/ziptest/";

		String fileName = "Test.zip";
		
		Testunzip (Sourcedirpath, FileName, Destdirpath);
	Testzip (Sourcedirpath,destdirpath); /** * Test Generation ZIP Package * @param sourcedirpath * @param destdirpath * * private static void Testzip (String sourcedirpa
		
		Th, String destdirpath) {file dir = new file (Sourcedirpath);
		String zipfilename = "Test.zip";
		
		File ZipFile = new file (destdirpath+zipfilename);
		
		List<file> resfilelist = null;
			if (dir.exists () && dir.isdirectory ()) {file[] files = dir.listfiles ();
		Resfilelist = arrays.aslist (files);
			
			try {ziputils.zipfiles (resfilelist, ZipFile); System.out.println ("ZIP Success ");
		catch (IOException e) {e.printstacktrace (); }/** * Test extract Zip Package * @param sourcedirpath * @param fileName * @param destdirpath/private static void Te Stunzip (String Sourcedirpath, String fileName, String destdirpath) {File ZipFile = new File (Sourcedirpath + filen

		AME);

			try {ziputils.upzipfile (ZipFile, Destdirpath);
		System.out.println ("unzip success");
		catch (Zipexception e) {e.printstacktrace ();
		catch (IOException e) {e.printstacktrace ();
 }
	}

}