Post a Java read HDFs unzip the gz zip tar.gz saved to HDFs code

Source: Internet
Author: User

Package Main.java;

Import java.io.*;
Import java.util.LinkedList;
Import java.util.List;
Import java.util.zip.*;


Import org.apache.commons.compress.archivers.ArchiveException;

Import Org.apache.commons.compress.archivers.ArchiveInputStream;

Import Org.apache.commons.compress.archivers.ArchiveStreamFactory;

Import Org.apache.commons.compress.archivers.tar.TarArchiveEntry;

Import java.io.IOException;
Import Java.net.URI;

Import Org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;
Import org.apache.hadoop.conf.Configuration;
Import Org.apache.hadoop.fs.FileSystem;
Import Org.apache.hadoop.fs.Path;
Import Org.apache.hadoop.fs.FSDataInputStream;
import Org.apache.hadoop.fs.FSDataOutputStream;;


/**

* Unzip the tar.gz zip GZ package where the data source and output directory are HDFs

*

*/

public class Gziphdfs {


Private Bufferedoutputstream Bufferedoutputstream;
String zipfilename = null;


Public Gziphdfs (String fileName) {

This.zipfilename = FileName;

}

/*

* Execute the Portal, Rarfilename for the file path to be extracted (specific to the file), Destdir to extract the target path path to HDFs

*/

Public list<string> Untargzfile (string rarfilename, String destDir) throws IOException {

Gziphdfs Gziphdfs = new Gziphdfs (rarfilename);
Configuration conf = new configuration ();
FileSystem fs = Filesystem.get (Uri.create (DestDir), conf);
Boolean result = Fs.isdirectory (new Path (DestDir));
if (!result) {
Fs.mkdirs (New Path (DestDir));
}
String outputdirectory = DestDir;

list<string> r = gziphdfs.defuntargzfile (OutputDirectory, FS);
Fs.close ();
return R;

}


Public list<string> defuntargzfile (String outputdirectory, FileSystem FS) {

FileInputStream FIS = null;
Archiveinputstream in = null;
Bufferedinputstream bufferedinputstream = null;
list<string> tarlist = new linkedlist<string> ();

try {

Fsdatainputstream Hdfsinputstream = Fs.open (new Path (Zipfilename));


Gzipinputstream is = new Gzipinputstream (New Bufferedinputstream (
Hdfsinputstream));

in = new Archivestreamfactory (). Createarchiveinputstream ("Tar", is);

Bufferedinputstream = new Bufferedinputstream (in);

Tararchiveentry entry = (tararchiveentry) in.getnextentry ();


while (entry! = NULL) {

String name = Entry.getname ();

string[] names = Name.split ("/");

String fileName = outputdirectory;

for (int i = 0; i < names.length; i++) {

String str = names[i];

filename = filename + "/" + str;

}

Fsdataoutputstream Hdfsoutstream = fs.create (new Path (FileName));


Bufferedoutputstream = new Bufferedoutputstream (
Hdfsoutstream);

int b;

while ((b = Bufferedinputstream.read ())! =-1) {

Bufferedoutputstream.write (b);

}

Bufferedoutputstream.flush ();

Bufferedoutputstream.close ();


Entry = (tararchiveentry) in.getnextentry ();

Tarlist.add (name);

}


} catch (FileNotFoundException e) {

E.printstacktrace ();

} catch (IOException e) {

E.printstacktrace ();

} catch (Archiveexception e) {

E.printstacktrace ();

} finally {

try {

if (bufferedinputstream! = null) {

Bufferedinputstream.close ();


}

} catch (IOException e) {

E.printstacktrace ();

}

}
return tarlist;

}
/*

* Execute the Portal, Rarfilename for the file path to be extracted (specific to the file), Destdir to extract the target path path to HDFs

*/

Public list<string> Unzipfile (string rarfilename, String destDir) throws IOException {

Gziphdfs Gziphdfs = new Gziphdfs (rarfilename);
Configuration conf = new configuration ();

FileSystem fs = Filesystem.get (Uri.create (DestDir), conf);
Boolean result = Fs.isdirectory (new Path (DestDir));
if (!result) {
Fs.mkdirs (New Path (DestDir));
}
String outputdirectory = DestDir;

list<string> r = gziphdfs.defunzipfile (OutputDirectory, FS);
Fs.close ();
return R;

}


Public list<string> defunzipfile (String outputdirectory, FileSystem FS) {

FileInputStream FIS = null;
Archiveinputstream in = null;
Bufferedinputstream bufferedinputstream = null;
list<string> ziplist = new linkedlist<string> ();

try {


Fsdatainputstream Hdfsinputstream = Fs.open (new Path (Zipfilename));
Zipinputstream is = new Zipinputstream (New Bufferedinputstream (
Hdfsinputstream));


Bufferedinputstream = new Bufferedinputstream (IS);
ZipEntry entry =is.getnextentry ();


while (entry! = NULL) {

String name = Entry.getname ();

string[] names = Name.split ("/");

String fileName = outputdirectory;

for (int i = 0; i < names.length; i++) {

String str = names[i];

filename = filename + "/" + str;

}

Fsdataoutputstream Hdfsoutstream = fs.create (new Path (FileName));

Bufferedoutputstream = new Bufferedoutputstream (
Hdfsoutstream);

int b;

while ((b = Bufferedinputstream.read ())! =-1) {

Bufferedoutputstream.write (b);

}

Bufferedoutputstream.flush ();

Bufferedoutputstream.close ();

Entry = (zipentry) is.getnextentry ();

Ziplist.add (name);

}


} catch (FileNotFoundException e) {

E.printstacktrace ();

} catch (IOException e) {

E.printstacktrace ();

} finally {

try {

if (bufferedinputstream! = null) {

Bufferedinputstream.close ();


}

} catch (IOException e) {

E.printstacktrace ();

}

}
return ziplist;

}
/*

* Execute the Portal, Rarfilename for the file path to be extracted (specific to the file), Destdir to extract the target path path to HDFs

*/


Public list<string> Ungzipfile (string rarfilename, String destDir) throws IOException {

Gziphdfs Gziphdfs = new Gziphdfs (rarfilename);
Configuration conf = new configuration ();
FileSystem fs = Filesystem.get (Uri.create (DestDir), conf);
Boolean result = Fs.isdirectory (new Path (DestDir));
if (!result) {
Fs.mkdirs (New Path (DestDir));
}
String outputdirectory = DestDir;

list<string> r = gziphdfs.defungzipfile (OutputDirectory, FS);
Fs.close ();
return R;

}


Public list<string> defungzipfile (String outputdirectory, FileSystem FS) {

FileInputStream FIS = null;
Archiveinputstream in = null;
Bufferedinputstream bufferedinputstream = null;
list<string> tarlist = new linkedlist<string> ();

try {

Fsdatainputstream Hdfsinputstream = Fs.open (new Path (Zipfilename));


Gzipcompressorinputstream is = new Gzipcompressorinputstream (New Bufferedinputstream (
Hdfsinputstream));
Bufferedinputstream = new Bufferedinputstream (IS);


string[] NameList = Zipfilename.split ("/");
String name=namelist[namelist.length-1].replace (". Gz", "");
String fileName = outputdirectory+ "/" +name;
Fsdataoutputstream Hdfsoutstream = fs.create (new Path (FileName));
Bufferedoutputstream = new Bufferedoutputstream (
Hdfsoutstream);
int b;
while ((b = Bufferedinputstream.read ())! =-1) {
Bufferedoutputstream.write (b);

}
Bufferedoutputstream.flush ();
Bufferedoutputstream.close ();
Tarlist.add (name);




} catch (FileNotFoundException e) {

E.printstacktrace ();

} catch (IOException e) {

E.printstacktrace ();

} finally {

try {

if (bufferedinputstream! = null) {

Bufferedinputstream.close ();


}

} catch (IOException e) {

E.printstacktrace ();

}

}
return tarlist;

}


}

Post a Java read HDFs unzip the gz zip tar.gz saved to HDFs code

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