JAVA解压.TAR.Z及.ZIP文件

Posted 2020-08-24 程序员在职场

 解压.ZIP文件

package app.qdupr.Method;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
 
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
 
/**
 * ZIP文件解压
 * @author Administrator
 *
 */
public class ZipUncompress {
  
 private static int bufSize = 8096;    //size of byte
 
 public static void main(String[] args) throws Exception  
    {  
        
  
        String tmpFile = "C:\\Users\\Administrator\\Desktop\\20151101.rar";  
        ZipUncompress.unZip(tmpFile, tmpFile.substring(0, tmpFile.lastIndexOf(".")));  
        // -----------------  
        System.out.println("Usage:");  
        System.out.println("解压:java ZipFileUtils -unzip fileName.zip");  
        System.out.println();  
    }  
 public static String unZip(String unZipFileName, String destFileName)  
    {  
        File unzipFile = new File(unZipFileName);  
  
        if(destFileName == null || destFileName.trim().length() == 0)  
        {  
            destFileName = unzipFile.getParent();  
        }  
  
        File destFile;  
        ZipFile zipFile = null;  
        try  
        {  
            zipFile = new ZipFile(unzipFile, "GBK");  
            for(Enumeration entries = zipFile.getEntries(); entries.hasMoreElements();)  
            {  
                ZipEntry entry = (ZipEntry) entries.nextElement();  
                destFile = new File(destFileName, entry.getName());  
  
                unZipFile(destFile, zipFile, entry); //执行解压  
            }  
        } catch(Exception e)  
        {  
            return e.getMessage();  
        }  
        finally  
        {  
            try  
            {  
                assert zipFile != null;  
                zipFile.close();  
            } catch(Exception e)  
            {  
                e.printStackTrace();
            }  
        }  
        return null;  
    }  
 private static void unZipFile(File destFile, ZipFile zipFile, ZipEntry entry)  
        throws IOException  
    {  
        InputStream inputStream;  
        FileOutputStream fileOut;  
        if(entry.isDirectory()) //是目录，则创建之  
        {  
            destFile.mkdirs();  
        }  
        else //是文件  
        {  
            //如果指定文件的父目录不存在,则创建之.  
            File parent = destFile.getParentFile();  
            if(parent != null && !parent.exists())  
            {  
                parent.mkdirs();  
            }  
  
            inputStream = zipFile.getInputStream(entry);  
  
            fileOut = new FileOutputStream(destFile);  
            byte[] buf = new byte[bufSize];  
            int readedBytes;  
            while((readedBytes = inputStream.read(buf)) > 0)  
            {  
                fileOut.write(buf, 0, readedBytes);  
            }  
            fileOut.close();  
  
            inputStream.close();  
        }  
    } 
}     

解压.TAR.Z文件
所需jar包 commons-compress-1.7及以上

package app.qdupr.Method;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
 
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.compressors.z.ZCompressorInputStream;
/**
 * 自动解压.Z格式的文件
 * @author Administrator
 *
 */
 
public class ZCompress {
 
/**
 * 测试方法
 * @param args
 */
public static void main(String[] args) {
ZCompress zip = new ZCompress();
  File dir = new File("E:\\Test");
  File[] subs = dir.listFiles();
  for (File sub : subs) {
  
  String file=sub.getParent()+File.separator+sub.getName();
  zip.uncompress(file);
      System.out.println(file);
   }
}
 
 
/**
 * 获取文件夹下全部文件
 * @param file
 */
public static void findAllfile(String file) {
ZCompress zip = new ZCompress();
  File dir = new File(file);
  File[] subs = dir.listFiles();
  for (File sub : subs) {
  String newfile=sub.getParent()+File.separator+sub.getName();
  zip.uncompress(newfile);
   }
}
/**
 * .Z文件解压
 * @param file
 */
public  void  uncompress(String file) {
//File file =new File("E:\\BEA20151101.Z");
ZCompress.deCompressTZFile(file);
}
/**
 * 将String型转换为File类型
 * @param file
 * @return
 */
public static File deCompressTZFile(String file) {
return deCompressZFile(new File(file));
}
/**
 * 执行解压
 * @param file
 * @return
 */
private static File deCompressZFile(File file) {
int buffersize = 2048;
FileOutputStream out = null;
ZCompressorInputStream zIn = null;
try {
FileInputStream fin = new FileInputStream(file);
BufferedInputStream in = new BufferedInputStream(fin);
//解压后的文件存放路径及文件名
String  name = file.getName().substring(0, file.getName().indexOf("."));
File outFile = new File("E:\\File\\"+name);
out = new FileOutputStream(outFile);
zIn = new ZCompressorInputStream(in);
final byte[] buffer = new byte[buffersize];
int n = 0;
while (-1 != (n = zIn.read(buffer))) {
out.write(buffer, 0, n);
}
return outFile;
} catch (Exception e) {
e.printStackTrace();
return null;
} finally {
try {
out.close();
zIn.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
 
/**
 * .TAR格式文件解压
 * @param file
 */
private static void deCompressTARFile(File file) {
int buffersize = 2048;
String basePath = file.getParent() + File.separator;
TarArchiveInputStream is = null;
try {
is = new TarArchiveInputStream(new FileInputStream(file));
while (true) {
TarArchiveEntry entry = is.getNextTarEntry();
if (entry == null) {
break;
}
if (entry.isDirectory()) {// 这里貌似不会运行到，跟ZipEntry有点不一样
new File(basePath + entry.getName()).mkdirs();
} else {
FileOutputStream os = null;
try {
File f = new File(basePath + entry.getName());
if (!f.getParentFile().exists()) {
f.getParentFile().mkdirs();
}
if (!f.exists()) {
f.createNewFile();
}
os = new FileOutputStream(f);
byte[] bs = new byte[buffersize];
int len = -1;
while ((len = is.read(bs)) != -1) {
os.write(bs, 0, len);
}
os.flush();
} catch (Exception e) {
e.printStackTrace();
} finally {
os.close();
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
is.close();
file.delete();
} catch (IOException e) {
e.printStackTrace();
}
}
 
}
 
}