By Java file compression, packing a bag collector tar.gz

First, how to package Java files

Maven 1.1 add-dependent

<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.12</version>
</dependency>

　

1.2 Packaging core code

By means packing idea is as follows:Apachecompress

• ①: Create an FileOutputStreamoutput file (.tar.gz) files.

• ②: create a GZIPOutputStream, used to wrap FileOutputStreamthe object.

• ③: create a TarArchiveOutputStream, used to wrap GZIPOutputStreamthe object.

• ④: Then, read all the files in the folder.

• ⑤: If it is a directory, it is added to TarArchiveEntry.

• ⑥: if the file still add it to TarArchiveEntry, and then the contents of the file needs to be written TarArchiveOutputStreamin.

 

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
import org.apache.commons.io.IOUtils;

import java.io.*;
import java.util.zip.GZIPOutputStream;

{class TarUtils public 
    public static void the compress (sourceFolder String, String tarGzPath) throws IOException { 
        createTarFile (sourceFolder, tarGzPath); 
    } 
    Private static void createTarFile (sourceFolder String, String tarGzPath) { 
        TarArchiveOutputStream TAROS = null; 
        the try { 
            // Create a FileOutputStream to the output file (.tar.gz) FileOutputStream fos = new new FileOutputStream (tarGzPath); 
            // Create a GZIPOutputStream, for packaging new new FileOutputStream object as GZIPOutputStream = GOS as GZIPOutputStream (BufferedOutputStream the new new (fos)); 
            // Create a TarArchiveOutputStream, for packaging GZIPOutputStream objects 
            tarOs = new TarArchiveOutputStream (gos);
            // If this mode is set when the file name of more than 100 bytes will throw an exception, the exception is as follows: 
            // IS TOO Long (> 100 bytes) 
            // specifically refer to the official document: http: // commons. apache.org/proper/commons-compress/tar.html#Long_File_Names 
            tarOs.setLongFileMode (TarArchiveOutputStream.LONGFILE_POSIX); 
            addFilesToTarGZ (sourceFolder, "", TAROS); 
        } the catch (IOException E) { 
            e.printStackTrace (); 
        } {the finally 
            {the try 
                tarOs.close (); 
            } the catch (IOException E) { 
                e.printStackTrace (); 
            } 
        } 
    }

    public static void addFilesToTarGZ(String filePath, String parent, TarArchiveOutputStream tarArchive) throws IOException {
        File file = new File(filePath);
        // Create entry name relative to parent file pat
        String entryName = parent + file.getName();
        // 添加 tar ArchiveEntry
        tarArchive.putArchiveEntry(new TarArchiveEntry(file, entryName));
        if (file.isFile()) {
            FileInputStream fis = new FileInputStream(file);
            BufferedInputStream bis = new BufferedInputStream(fis);
            // 写入文件
            IOUtils.copy(bis, tarArchive);
            tarArchive.closeArchiveEntry();
            bis.close();
        IF the else} (file.isDirectory ()) { 
            // folder because, without writing the contents, can be closed 
            tarArchive.closeArchiveEntry (); 
            // read the folder and all files 
            for (File f: file.listFiles ( )) { 
                // recursive 
                addFilesToTarGZ (f.getAbsolutePath (), + the File.separator entryName, tarArchive); 
            } 
        } 
    } 

    public static void main (String [] args) throws IOException { 
        // test wave, the filebeat-7.1. 0-linux-x86_64 package name as filebeat-7.1.0-linux-x86_64.tar.gz the tar package 
        compress ( "/ Users / a123123 / Work / filebeat-7.1.0-linux-x86_64", "/ Users / a123123 /Work/tmp_files/filebeat-7.1.0-linux-x86_64.tar.gz "); 

    } 
}