java代碼實(shí)現(xiàn)壓縮文件.gz格式，解壓后無(wú)后綴名問題

package com.ctid.cps.util.gzipUtil;

import com.ctid.util.file.FileUtil;
import com.ctid.util.file.GZip;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

/**

• GZIP工具

• @author
  */
  public class GzipUtils {

  public static final int BUFFER = 1024;
  public static final String EXT = “.gz”;

  /**

  • 數(shù)據(jù)壓縮

  • @param data

  • @return

  • @throws Exception
    */
    public static byte[] compress(byte[] data) throws Exception {
    ByteArrayInputStream bais = new ByteArrayInputStream(data);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    // 壓縮
    compress(bais, baos);

    byte[] output = baos.toByteArray();

    baos.flush();
    baos.close();

    bais.close();

    return output;
    }

  /**

  • 文件壓縮
  • @param file
  • @throws Exception
    */
    public static void compress(File file) throws Exception {
    compress(file, true);
    }

  /**

  • 文件壓縮

  • @param file

  • @param delete 是否刪除原始文件

  • @throws Exception
    */
    public static void compress(File file, boolean delete) throws Exception {
    FileInputStream fis = new FileInputStream(file);
    FileOutputStream fos = new FileOutputStream(file.getPath() + EXT);

    compress(fis, fos);

    fis.close();
    fos.flush();
    fos.close();

    if (delete) {
    file.delete();
    }
    }

  /**

  • 數(shù)據(jù)壓縮

  • @param is

  • @param os

  • @throws Exception
    */
    public static void compress(InputStream is, OutputStream os)
    throws Exception {

    GZIPOutputStream gos = new GZIPOutputStream(os);

    int count;
    byte data[] = new byte[BUFFER];
    while ((count = is.read(data, 0, BUFFER)) != -1) {
    gos.write(data, 0, count);
    }

    gos.finish();

    gos.flush();
    gos.close();
    }

  /**

  • 文件壓縮
  • @param path
  • @throws Exception
    */
    public static void compress(String path) throws Exception {
    compress(path, true);
    }

  /**

  • 文件壓縮
  • @param path
  • @param delete 是否刪除原始文件
  • @throws Exception
    */
    public static void compress(String path, boolean delete) throws Exception {
    File file = new File(path);
    compress(file, delete);
    }

  /**

  • 文件壓縮
  • @param
  • @param
  • @throws Exception
    */
    public static void compress(String inputFileName, String outputFileName)
    throws Exception {
    FileInputStream inputFile = new FileInputStream(inputFileName);
    FileOutputStream outputFile = new FileOutputStream(outputFileName);
    compress(inputFile, outputFile);
    inputFile.close();
    outputFile.flush();
    outputFile.close();
    }

  /**

  • 數(shù)據(jù)解壓縮

  • @param data

  • @return

  • @throws Exception
    */
    public static byte[] decompress(byte[] data) throws Exception {
    ByteArrayInputStream bais = new ByteArrayInputStream(data);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    // 解壓縮

    decompress(bais, baos);

    data = baos.toByteArray();

    baos.flush();
    baos.close();

    bais.close();

    return data;
    }

  /**

  • 文件解壓縮
  • @param file
  • @throws Exception
    */
    public static void decompress(File file) throws Exception {
    decompress(file, true, null);
    }

  /**

  • 文件解壓縮

  • @param file 需要解壓的文件

  • @param delete 是否刪除原始文件

  • @param outPath 解壓文件的輸出路徑

  • @throws Exception
    */
    public static void decompress(File file, boolean delete, String outPath)
    throws Exception {
    FileInputStream fis = new FileInputStream(file);
    FileOutputStream fos = null;
    if (outPath == null || outPath == “”) {
    fos = new FileOutputStream(file.getPath().replace(EXT, “”));
    } else {
    File files = new File(outPath);
    //判斷文件是否存在，不存在，則創(chuàng)建
    FileUtil.mkDir(files);//此處調(diào)用了遞歸創(chuàng)建文件夾，沒有寫出，網(wǎng)上很多
    //文件輸出流參數(shù)中，需要指定文件解壓后的文件名，這里，用文件的原名稱
    fos = new FileOutputStream(outPath + File.separator
    + file.getName().replace(EXT, “”));
    }

    decompress(fis, fos);
    fis.close();
    fos.flush();
    fos.close();

    if (delete) {
    file.delete();
    }
    }

  /**

  • 文件解壓縮
  • @param
  • @param
  • @throws Exception
    */
    public static void decompress(String inputFileName, String outputFileName)
    throws Exception {
    FileInputStream inputFile = new FileInputStream(inputFileName);
    FileOutputStream outputFile = new FileOutputStream(outputFileName);
    decompress(inputFile, outputFile);
    inputFile.close();
    outputFile.flush();
    outputFile.close();
    }

  /**

  • 數(shù)據(jù)解壓縮

  • @param is

  • @param os

  • @throws Exception
    */
    public static void decompress(InputStream is, OutputStream os)
    throws Exception {
    GZIPInputStream gis = new GZIPInputStream(is);
    //GZIPInputStream gis = new GZIPInputStream(new BufferedInputStream(is));
    int count;
    byte data[] = new byte[BUFFER];
    while ((count = gis.read(data, 0, BUFFER)) != -1) {
    os.write(data, 0, count);
    }

    gis.close();
    }

  /**

  • 文件解壓縮
  • @param path
  • @throws Exception
    */
    public static void decompress(String path) throws Exception {
    decompress(path, true, null);
    }

  /**

  • 文件解壓縮(解壓?jiǎn)蝹€(gè)文件)
  • @param path 需要解壓的文件路徑（包含文件名稱）
  • @param delete 是否刪除原始文件（true：刪除；false：保留）
  • @param outPath 解壓后文件的輸出路徑，如果該參數(shù)的值為 null，則輸出解壓文件到當(dāng)前文件夾
  • @throws Exception
    */
    public static void decompress(String path, boolean delete, String outPath)
    throws Exception {
    File file = new File(path);
    decompress(file, delete, outPath);
    }

  //測(cè)試，通過遍歷，解壓一個(gè)文件夾中的所有文件
  /* public static void main(String[] args) throws Exception {
  long startTime = System.currentTimeMillis();// 記錄開始時(shí)間
  String path = “D:\compreFile\test2”;
  File file = new File(path);
  String files[] = file.list();
  System.out.println(“共 " + files.length + " 個(gè)文件”);
  Thread.sleep(2000);
  int num = 0;
  List list = new ArrayList();
  for (int x = 0; x < files.length; x++) {
  try {
  //調(diào)用解壓方法
  decompress(path + “\” + files[x], false, “D:\compreFile\test2”);
  //GZip.unpackTarGZ(file,“D:\compreFile\test2”);
  } catch (Exception e) {
  list.add(files[x]);
  continue;
  }
  ++num;
  System.out.println(“第 " + num + " 個(gè)文件.tar.gz解壓成功！！”);
  }
  // String tarPath = “D:\compreFile\test2\”;
  // File fileTar = new File(tarPath);
  // String filesTar[] = fileTar.list();
  // int nber = 0;
  // for (int j = 0; j < filesTar.length; j++) {
  // try {
  // //調(diào)用解壓方法
  // tarToFile.uncompress(tarPath + filesTar[j], “D:\compreFile\test”);
  // } catch (Exception e) {
  // list.add(files[j]);
  // continue;
  // }
  // ++nber;
  // System.out.println(“第 " + nber + " 個(gè)文件.tar解壓成功！！”);
  // }
  for(int x=0;x<list.size();x++){
  System.out.println(list.get(x).toString());
  }
  System.out.println("問題文件 " + list.size() + " 個(gè) ");

  public static void main(String[] args) throws Exception {
  TarToFile tarToFile = new TarToFile();
  long startTime = System.currentTimeMillis();// 記錄開始時(shí)間
  String path = “D:\JAVA壓縮解壓\”;
  File file = new File(path);
  String files[] = file.list();
  System.out.println(“共 " + files.length + " 個(gè)文件”);
  Thread.sleep(2000);
  int num = 0;
  List list = new ArrayList();
  for (int x = 0; x < files.length; x++) {
  try {
  //調(diào)用壓縮方法
  compress(path + files[x], “D:\compreFile\test2\ceshi1” + num + “.gz”);
  System.out.println(path + files[x]);
  } catch (Exception e) {
  System.out.println(e);
  list.add(files[x]);
  continue;
  }
  ++num;
  System.out.println(“第 " + num + " 個(gè)文件壓縮成功！！”);
  }
  System.out.println("問題文件 " + list.size() + " 個(gè) ");
  long endTime = System.currentTimeMillis();// 記錄結(jié)束時(shí)間
  float excTime = (float) (endTime - startTime) / 1000;
  System.out.println(“執(zhí)行時(shí)間：” + excTime + “s”);
  System.out.println(“完成！！”);
  }
  }

這是我的代碼，找了一個(gè)小時(shí)的問題，為什么解壓以后無(wú)后綴，最終是發(fā)現(xiàn)壓縮的時(shí)候在.gz 前面加上文件后綴，比如你要壓縮一個(gè) .java文件
（ //調(diào)用壓縮方法的時(shí)候
compress(path + files[x], “D:\compreFile\test2\ceshi1” + num + “.java.gz”);）//把文件后綴得加上去

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