[Java] Extract TAR, JAR, ZIP (압축풀기)

# Java (자바)

그루비(Groovy)로 코딩되었습니다.

조금만 수정하시면, 자바에서도 사용할 수 있습니다. :D

### Extract TAR (Untar/언타르)

1. Build.gradle

dependencies {
    //GROOVY
    compile 'org.codehaus.groovy:groovy-all:2.1.3'

    //TAR
    compile 'org.apache.commons:commons-compress:1.4.1' 
}

2. xxx.groovy

public void untar(String filePath, String dest){
    println ' - Start Untar'
    byte[] buffer = new byte[2048]

    try{
        /** Ready **/
        FileInputStream fin = new FileInputStream(filePath)
        BufferedInputStream bis = new BufferedInputStream(fin)
        GzipCompressorInputStream gzIn = new GzipCompressorInputStream(bis)
        TarArchiveInputStream tarIn = new TarArchiveInputStream(gzIn)
        TarArchiveEntry entry
        /** Read the tar entries using the getNextEntry method **/
        while ((entry = (TarArchiveEntry) tarIn.getNextEntry()) != null){
            File file = new File(dest, entry.getName())
            println "Extracting: ${file.getAbsolutePath()}"
            if (entry.isDirectory()){
                file.mkdirs()
            }else{
                file.parentFile.mkdirs()
                int len
                FileOutputStream fos = new FileOutputStream(file)
                BufferedOutputStream destOs = new BufferedOutputStream(fos, BUFFER)
                while ((len = tarIn.read(buffer, 0, BUFFER)) != -1){
                    destOs.write(buffer, 0, len)
                }
                destOs.close()
            }
        }
        /** Close the input stream **/
        tarIn.close()
        println "Untar Completed Successfully!!"

    }catch(IOException ex){
        ex.printStackTrace()
    }
}

### Extract ZIP (Unzip/언집)

1. Build.gradle

dependencies {
    //GROOVY
    compile 'org.codehaus.groovy:groovy-all:2.1.3'
}

2. xxx.groovy

public void unzip(String sourcePath, String destPath){
    println ' - Start Unzip'
    byte[] buffer = new byte[2048]

    try{
        /** Ready **/
        ZipInputStream zis = new ZipInputStream(new FileInputStream(sourcePath))
        ZipEntry entry
        /** Read the zip entries using the getNextEntry method **/
        while ((entry = zis.getNextEntry()) != null){
            File file = new File(destPath + File.separator + entry.getName())
            println "Extracting: ${file.getAbsolutePath()}"
            if (entry.isDirectory()){
                file.mkdirs()
            }else{
                file.parentFile.mkdirs()
                FileOutputStream fos = new FileOutputStream(file)
                int len
                while ((len = zis.read(buffer)) > 0) {
                    fos.write(buffer, 0, len)
                }
                fos.close()
            }
        }
        /** Close the input stream **/
        zis.closeEntry()
        zis.close()
        println "Unzip Completed Successfully!!"

    }catch(IOException ex){
        ex.printStackTrace()
    }
}

### Extract JAR (Unjar/언자르)

1. Build.gradle

dependencies {
    //GROOVY
    compile 'org.codehaus.groovy:groovy-all:2.1.3'
}

2. xxx.groovy

public void unjar(String sourcePath, String destPath){
        println ' - Start Unjar'
        byte[] buffer = new byte[2048]

        try{
            /** Ready **/
            java.util.jar.JarFile jar = new java.util.jar.JarFile(sourcePath)
            java.util.Enumeration enumEntries = jar.entries()
            /** Read the jar entries using the nextElement method **/
            while (enumEntries.hasMoreElements()) {
                java.util.jar.JarEntry entry = (java.util.jar.JarEntry) enumEntries.nextElement()
                java.io.File file = new java.io.File(destPath + java.io.File.separator + entry.getName())
                println "Extracting: ${file.getAbsolutePath()}"
                if (entry.isDirectory()) {
                    file.mkdirs()
                }else{
                    file.parentFile.mkdirs()
                    java.io.InputStream is = jar.getInputStream(entry)
                    java.io.FileOutputStream fos = new java.io.FileOutputStream(file)
                    int len
                    while ((len = is.read(buffer)) > 0) {
                        fos.write(buffer, 0, len)
                    }
                    fos.close()
                    is.close()
                }
            }
            /** Close the input stream **/
            jar.close()
            println "Unjar Completed Successfully!!"

        }catch(IOException ex){
            ex.printStackTrace()
        }


    }

### 참고

How to write a Java program which can extract a JAR file and store its data in specified directory (location)?: 

http://stackoverflow.com/questions/1529611/how-to-write-a-java-program-which-can-extract-a-jar-file-and-store-its-data-in-s